WIP: Add led-activation blocks.

As an example two functions are added:
 - Create notification.
 - Clear notifications.

Makefile

@@ -0,0 +1,45 @@
+
+ROUND_ICONS=app/src/main/res/mipmap-mdpi/ic_launcher_round.png \
+            app/src/main/res/mipmap-hdpi/ic_launcher_round.png \
+            app/src/main/res/mipmap-xhdpi/ic_launcher_round.png \
+            app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
+	
+RECT_ICONS=app/src/main/res/mipmap-mdpi/ic_launcher.png \
+           app/src/main/res/mipmap-hdpi/ic_launcher.png \
+           app/src/main/res/mipmap-xhdpi/ic_launcher.png \
+           app/src/main/res/mipmap-xxhdpi/ic_launcher.png
+	
+ICONS=$(ROUND_ICONS) $(RECT_ICONS)
+RECT_BASE=app/src/main/res/mipmap-xxxhdpi/ic_launcher.png 
+ROUND_BASE=app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
+BASE_ICONS=$(RECT_BASE) $(ROUND_BASE)
+
+.PHONY: all
+
+all: $(ICONS)
+
+app/src/main/res/mipmap-mdpi/ic_launcher_round.png: $(ROUND_BASE)
+	convert $< -resize 48x48 $@
+
+app/src/main/res/mipmap-hdpi/ic_launcher_round.png: $(ROUND_BASE)
+	convert $< -resize 72x72 $@
+	
+app/src/main/res/mipmap-xhdpi/ic_launcher_round.png: $(ROUND_BASE)
+	convert $< -resize 96x96 $@
+	
+app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png: $(ROUND_BASE)
+	convert $< -resize 144x144 $@
+	
+app/src/main/res/mipmap-mdpi/ic_launcher.png: $(RECT_BASE)
+	convert $< -resize 48x48 $@
+
+app/src/main/res/mipmap-hdpi/ic_launcher.png: $(RECT_BASE)
+	convert $< -resize 72x72 $@
+	
+app/src/main/res/mipmap-xhdpi/ic_launcher.png: $(RECT_BASE)
+	convert $< -resize 96x96 $@
+	
+app/src/main/res/mipmap-xxhdpi/ic_launcher.png: $(RECT_BASE)
+	convert $< -resize 144x144 $@
+	
+

app/build.gradle

@@ -1,15 +1,17 @@
 apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android-extensions'
+apply plugin: 'kotlin-android'
 
 android {
-    compileSdkVersion 25
+    compileSdkVersion 29
     buildToolsVersion "27.0.1"
     defaultConfig {
         applicationId "com.codigoparallevar.minicards"
         minSdkVersion 15
-        targetSdkVersion 25
+        targetSdkVersion 29
         versionCode 1
         versionName "1.0"
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
         release {
@@ -17,18 +19,31 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+    compileOptions {
+        sourceCompatibility = 1.8
+        targetCompatibility = 1.8
+    }
 }
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
+    implementation 'androidx.annotation:annotation:1.0.0'
+    implementation 'androidx.lifecycle:lifecycle-extensions:2.0.0'
+    androidTestImplementation('androidx.test.espresso:espresso-core:3.1.0', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
-    implementation 'com.android.support:appcompat-v7:25.4.0'
+    implementation 'androidx.appcompat:appcompat:1.0.0'
     testImplementation 'junit:junit:4.12'
-    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
-    implementation 'com.android.support:design:25.4.0'
-    compile 'com.getbase:floatingactionbutton:1.10.1'
-    compile 'com.larswerkman:HoloColorPicker:1.5'
-    implementation 'com.android.support:cardview-v7:25.4.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'com.google.android.material:material:1.0.0'
+    implementation 'com.getbase:floatingactionbutton:1.10.1'
+    implementation 'com.larswerkman:HoloColorPicker:1.5'
+    implementation 'androidx.cardview:cardview:1.0.0'
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation 'com.google.code.gson:gson:2.8.6'
+
+    implementation group: 'com.squareup.okhttp3', name: 'okhttp', version: '4.7.2'
+}
+repositories {
+    mavenCentral()
 }

app/src/androidTest/java/com/codigoparallevar/minicards/ExampleInstrumentedTest.java

@@ -1,8 +1,8 @@
 package com.codigoparallevar.minicards;
 
 import android.content.Context;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;

app/src/main/AndroidManifest.xml

@@ -3,11 +3,14 @@
     package="com.codigoparallevar.minicards">
 
     <!-- OpenGL ES 2.0 -->
-
     <uses-feature
         android:glEsVersion="0x00020000"
         android:required="true" />
 
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" /> <!-- For Programaker bridge -->
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
@@ -15,9 +18,15 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
+        <service
+            android:name=".bridge.ProgramakerBridgeService"
+            android:enabled="true"
+            android:exported="true" />
+
         <activity android:name=".CardActivity">
             <intent-filter>
                 <action android:name="com.codigoparallevar.minicards.CARD" />
+
                 <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>
         </activity>
@@ -26,10 +35,12 @@
             android:theme="@style/AppTheme.NoActionBar">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
+
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
             <intent-filter>
                 <action android:name="com.codigoparallevar.minicards.DECK" />
+
                 <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>
         </activity>

app/src/main/java/com/codigoparallevar/minicards/CanvasView.java

@@ -4,27 +4,29 @@ import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
-import android.support.annotation.NonNull;
-import android.support.annotation.Nullable;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.MotionEvent;
 import android.view.View;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
 import com.codigoparallevar.minicards.motion.MotionMode;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartConnection;
 import com.codigoparallevar.minicards.types.PartGrid;
 import com.codigoparallevar.minicards.types.Position;
 import com.codigoparallevar.minicards.types.Selectable;
-import com.codigoparallevar.minicards.types.Tuple2;
-import com.codigoparallevar.minicards.types.Tuple4;
 import com.codigoparallevar.minicards.types.connectors.input.AnyInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.BooleanInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.SignalInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.StringInputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple4;
+import com.programaker.api.ProgramakerApi;
 
 import java.io.IOException;
 import java.util.ArrayList;
@@ -32,7 +34,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
-class CanvasView extends View implements PartGrid {
+public class CanvasView extends View implements PartGrid {
 
     @NonNull
     List<Part> parts = new ArrayList<>();
@@ -51,6 +53,7 @@ class CanvasView extends View implements PartGrid {
 
     @NonNull
     private String name = "default";
+    private ProgramakerApi api = null;
     private final static float touchTimeForLongTouchInMillis = 500;
     private boolean _isDragging = false;
     private CardActivity parentActivity = null;
@@ -142,7 +145,7 @@ class CanvasView extends View implements PartGrid {
             part.draw(scrolledCanvas, _devMode);
         }
 
-        Log.d("Render time", System.currentTimeMillis() - renderStartTime + "ms");
+        // Log.d("Render time", System.currentTimeMillis() - renderStartTime + "ms");
     }
 
     private void drawBackground(ScrolledCanvas canvas) {
@@ -236,6 +239,7 @@ class CanvasView extends View implements PartGrid {
                     break;
                 }
 
+                Log.d("CanvasView", "Moving part="+selectedPart);
                 if (selectedPart == null){
                     int xMovement = _mouseDownPoint.item1 - xInScreen;
                     int yMovement = _mouseDownPoint.item2 - yInScreen;
@@ -246,7 +250,7 @@ class CanvasView extends View implements PartGrid {
                     _mouseDownPoint = new Tuple2(xInScreen, yInScreen);
                 }
                 else {
-                    Log.i("Canvas", "X: " + xInScreen + " Y: " + yInScreen
+                    Log.d("Canvas", "X: " + xInScreen + " Y: " + yInScreen
                             + " in drop zone " + _dropToRemoveZone + " : "
                             + inDropZone(xInScreen, yInScreen));
 
@@ -323,22 +327,38 @@ class CanvasView extends View implements PartGrid {
         for (int i = parts.size() - 1; i >= 0; i--){
             final Part part = parts.get(i);
             // First try with output connectors
-            for (OutputConnector outputConnector :  part.getOutputConnectors()){
-                if (outputConnector.containsPoint(x, y)){
+            List<OutputConnector> outputConnectors = part.getOutputConnectors();
+            if (outputConnectors != null) {
+                for (OutputConnector outputConnector : outputConnectors) {
+                    if (outputConnector.containsPoint(x, y)) {
                         return outputConnector;
                     }
                 }
+            }
+
             // Then with input ones
-            for (InputConnector inputConnector :  part.getInputConnectors()){
-                if (inputConnector.containsPoint(x, y)){
+            List<InputConnector> inputConnectors = part.getInputConnectors();
+            if (inputConnectors != null) {
+                for (InputConnector inputConnector : inputConnectors) {
+                    if (inputConnector.containsPoint(x, y)) {
                         return inputConnector;
                     }
                 }
             }
+        }
 
         return null;
     }
 
+    @Override
+    public ProgramakerApi getApi() {
+        if (api == null) {
+            api = new ProgramakerApi();
+            api.setToken(new ConfigManager(this.getContext()).getToken());
+        }
+        return api;
+    }
+
     @Override
     @Nullable
     public SignalInputConnector getSignalInputConnectorOn(int x, int y) {

app/src/main/java/com/codigoparallevar/minicards/CardActivity.java

@@ -2,15 +2,27 @@ package com.codigoparallevar.minicards;
 
 import android.content.Context;
 import android.content.Intent;
-import android.support.design.widget.FloatingActionButton;
-import android.support.v7.app.ActionBar;
-import android.support.v7.app.AppCompatActivity;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.MotionEvent;
 import android.view.View;
 
+import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.app.AppCompatActivity;
+
+import com.codigoparallevar.minicards.toolbox.PartsHolder;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple3;
+import com.codigoparallevar.minicards.ui_helpers.GetAsync;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.programaker.api.ProgramakerApi;
+import com.programaker.api.data.ProgramakerBridgeInfo;
+import com.programaker.api.data.api_results.ProgramakerBridgeCustomBlockResult;
+import com.programaker.api.data.api_results.ProgramakerGetCustomBlocksResult;
+
 import java.io.IOException;
+import java.util.List;
 
 public class CardActivity extends AppCompatActivity {
 
@@ -18,7 +30,7 @@ public class CardActivity extends AppCompatActivity {
     public static final String CARD_PATH_KEY = "CARD_PATH";
     public static final String VISUALIZATION_MODE_KEY = "VISUALIZATION_MODE";
     public static final String DEVELOPER_VISUALIZATION_MODE = "DEVELOPER_VISUALIZATION_MODE";
-
+    public static final String USER_VISUALIZATION_MODE = "USER_VISUALIZATION_MODE";
 
     CanvasView canvasView;
     com.getbase.floatingactionbutton.AddFloatingActionButton AddPartButton;
@@ -34,11 +46,35 @@ public class CardActivity extends AppCompatActivity {
     boolean devMode = false;
     FloatingActionButton removePartFab;
     private PartsHolder partsHolder;
+    private ProgramakerApi ProgramakerApi;
+    private ConfigManager Config;
+    private ProgramakerGetCustomBlocksResult CustomBlocks = null;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        this.Config = new ConfigManager(this);
+        this.ProgramakerApi = new ProgramakerApi();
+        String token = this.Config.getToken();
+        if (token != null) {
+            this.ProgramakerApi.setToken(token);
+        }
+
+        partsHolder = new PartsHolder(this);
+
+        new GetAsync<Tuple2<List<ProgramakerBridgeInfo>, List<ProgramakerBridgeCustomBlockResult>>>()
+                .executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,
+                        new Tuple3<>(() ->
+                                new Tuple2<>(
+                                        CardActivity.this.ProgramakerApi.fetchConnectedBridges(),
+                                        CardActivity.this.ProgramakerApi.fetchCustomBlocks()),
+                                result -> {
+                                    partsHolder.addCustomBlocks(result.item1, result.item2);
+                                    Log.d("CARDActivity", "custom blocks: " + result.toString());
+                                },
+                                exception -> Log.e("CARDActivity", "error retrieving custom blocks: " + exception.toString())));
+
         // Hide action bar
         ActionBar actionBar = getSupportActionBar();
         if (actionBar != null) {
@@ -52,7 +88,6 @@ public class CardActivity extends AppCompatActivity {
         canvasView.setParentActivity(this);
 
         // Initialize auxiliary elements
-        partsHolder = new PartsHolder(this);
 
         removePartFab = (FloatingActionButton) findViewById(R.id.remove_part_fab);
         canvasView.setDropZone(
@@ -97,8 +132,7 @@ public class CardActivity extends AppCompatActivity {
         ShowDeckFromDevModeButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                Intent i = new Intent(DeckPreviewActivity.INTENT);
-                CardActivity.this.startActivity(i);
+                finish();
             }
         });
 
@@ -107,8 +141,7 @@ public class CardActivity extends AppCompatActivity {
         ShowDeckFromUserModeButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                Intent i = new Intent(DeckPreviewActivity.INTENT);
-                CardActivity.this.startActivity(i);
+                finish();
             }
         });
 
@@ -196,12 +229,12 @@ public class CardActivity extends AppCompatActivity {
             if (canvasView.isDragging()){
                 devFabMenu.setVisibility(View.GONE);
                 userFabMenu.setVisibility(View.GONE);
-                removePartFab.setVisibility(View.VISIBLE);
+                ((View)removePartFab).setVisibility(View.VISIBLE);
                 Log.d("Main", "Changing visibility!");
             }
             else {
                 this.setDevMode(devMode);
-                removePartFab.setVisibility(View.GONE);
+                ((View)removePartFab).setVisibility(View.GONE);
                 Log.d("Main", "Now changing visibility!");
             }
             canvasView.setDropZone(
@@ -211,8 +244,16 @@ public class CardActivity extends AppCompatActivity {
     }
 
     public static void openCard(Context context, CardFile cardfile, String visualizationMode) {
+        openCardByPath(context, cardfile.getPath(), visualizationMode);
+    }
+
+    public static void openCard(Context context, PreviewCard cardfile, String visualizationMode) {
+        openCardByPath(context, cardfile.getPath(), visualizationMode);
+    }
+
+    private static void openCardByPath(Context context, String path, String visualizationMode) {
         Intent i = new Intent(INTENT);
-        i.putExtra(CARD_PATH_KEY, cardfile.getPath());
+        i.putExtra(CARD_PATH_KEY, path);
         if (visualizationMode != null) {
             i.putExtra(VISUALIZATION_MODE_KEY, visualizationMode);
         }

app/src/main/java/com/codigoparallevar/minicards/CardFile.java

@@ -4,9 +4,11 @@ import android.annotation.TargetApi;
 import android.content.Context;
 import android.graphics.Color;
 import android.os.Build;
-import android.support.annotation.NonNull;
 import android.util.Log;
 
+import androidx.annotation.NonNull;
+
+import com.codigoparallevar.minicards.parts.ProgramakerCustomBlockPart;
 import com.codigoparallevar.minicards.parts.buttons.RoundButton;
 import com.codigoparallevar.minicards.parts.logic.Ticker;
 import com.codigoparallevar.minicards.parts.logic.Toggle;
@@ -16,7 +18,7 @@ import com.codigoparallevar.minicards.parts.strings.ConvertToString;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartConnection;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 
 import org.json.JSONArray;
 import org.json.JSONException;
@@ -34,7 +36,7 @@ import java.util.UUID;
 
 public class CardFile {
 
-    static final int DEFAULT_BACKGROUND_COLOR = Color.parseColor("#044563");
+    static final int DEFAULT_BACKGROUND_COLOR = Color.parseColor("#4485A3");
     static final String PATH_SEPARATOR = "/";
     @NonNull
     private final String cardsDirectory;
@@ -284,6 +286,13 @@ public class CardFile {
 
             return convertToStringInfo;
         }
+        else if (type.equals(ProgramakerCustomBlockPart.class.getName())){
+            Tuple2<Part, List<PartConnection>> customBlockPartInfo = ProgramakerCustomBlockPart.deserialize(
+                    grid,
+                    jsonObject.getJSONObject("_data"));
+
+            return customBlockPartInfo;
+        }
         else {
             throw new JSONException("Expected known class, found " + type);
         }

app/src/main/java/com/codigoparallevar/minicards/CardPreviewArrayAdapter.java

@@ -4,9 +4,9 @@ import android.app.Dialog;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
-import android.support.annotation.NonNull;
-import android.support.v7.app.AlertDialog;
-import android.support.v7.widget.CardView;
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AlertDialog;
+import androidx.cardview.widget.CardView;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -17,6 +17,8 @@ import android.widget.ImageView;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+
 import java.io.IOException;
 
 class CardPreviewArrayAdapter extends ArrayAdapter<PreviewCard> {
@@ -41,16 +43,18 @@ class CardPreviewArrayAdapter extends ArrayAdapter<PreviewCard> {
         final View row = inflater.inflate(R.layout.card_preview, parent, false);
         final PreviewCard card = this.cards[position];
 
-        row.setOnClickListener(new View.OnClickListener() {
+        TextView nameView = row.findViewById(R.id.card_preview_name);
+        final CardView cardView = row.findViewById(R.id.card_preview_card);
+        final FloatingActionButton settingsButton = row.findViewById(R.id.card_preview_settings_button);
+
+        cardView.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                Intent i = new Intent(CardActivity.INTENT);
-                i.putExtra(CardActivity.CARD_PATH_KEY, card.getPath());
-                CardPreviewArrayAdapter.this.getContext().startActivity(i);
+                CardActivity.openCard(getContext(), card, CardActivity.DEVELOPER_VISUALIZATION_MODE);
             }
         });
 
-        final ImageView settingsButton = (ImageView) row.findViewById(R.id.card_preview_settings_button);
+
         settingsButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
@@ -58,19 +62,8 @@ class CardPreviewArrayAdapter extends ArrayAdapter<PreviewCard> {
             }
         });
 
-        CardView cardView = (CardView) row.findViewById(R.id.card_preview_card);
-        TextView nameView = (TextView) row.findViewById(R.id.card_preview_name);
 
-        int backgroundColor = card.getColor();
-        cardView.setBackgroundColor(backgroundColor);
         nameView.setText(card.getName());
-        if (backgroundColor == CardFile.DEFAULT_BACKGROUND_COLOR){
-            nameView.setTextColor(0xFFF0F0F0);
-        }
-        else {
-            nameView.setTextColor(0xFFFFFF ^ backgroundColor);
-        }
-
         return row;
     }
 
@@ -80,7 +73,7 @@ class CardPreviewArrayAdapter extends ArrayAdapter<PreviewCard> {
         final View openCardOptions = (LayoutInflater.from(getContext())
                 .inflate(R.layout.card_settings_dialog, null));
 
-        final EditText cardNameEditText = (EditText) openCardOptions.findViewById(R.id.card_setting_name_edit_text);
+        final EditText cardNameEditText = openCardOptions.findViewById(R.id.card_setting_name_edit_text);
         cardNameEditText.setText(card.getName());
 
         builder.setTitle("Card settings")
@@ -115,7 +108,7 @@ class CardPreviewArrayAdapter extends ArrayAdapter<PreviewCard> {
 
         final Dialog dialog = builder.create();
 
-        final TextView deleteCardLink = (TextView) openCardOptions.findViewById(R.id.card_setting_delete_card);
+        final TextView deleteCardLink = openCardOptions.findViewById(R.id.card_setting_delete_card);
         deleteCardLink.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {

app/src/main/java/com/codigoparallevar/minicards/ConfigManager.java

@@ -0,0 +1,66 @@
+package com.codigoparallevar.minicards;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+
+import static android.content.Context.MODE_PRIVATE;
+
+public class ConfigManager {
+    private final Context context;
+    private static final String PREFERENCES_NAME = "MINICARDS_PREFERENCES";
+    private static final String TOKEN_KEY = "PROGRAMAKER_API_TOKEN";
+    private static final String BRIDGE_ID_KEY = "PROGRAMAKER_BRIDGE_ID";
+    private static final String BRIDGE_CONNECTION_ID_KEY = "PROGRAMAKER_BRIDGE_CONNECTION_ID";
+
+    public ConfigManager(Context ctx) {
+        this.context = ctx;
+    }
+
+    public void setToken(String token) {
+        SharedPreferences preferences = this.context.getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE);
+        SharedPreferences.Editor edit = preferences.edit();
+
+        edit.putString(TOKEN_KEY, token);
+        edit.apply();
+    }
+
+    public String getToken() {
+        SharedPreferences preferences = this.context.getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE);
+        return preferences.getString(TOKEN_KEY, null);
+    }
+
+    public void removeBridgeId() {
+        SharedPreferences preferences = this.context.getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE);
+        SharedPreferences.Editor edit = preferences.edit();
+
+        if (preferences.contains(BRIDGE_ID_KEY)) {
+            edit.remove(BRIDGE_ID_KEY).apply();
+        }
+    }
+
+    public void setBridgeId(String bridgeId) {
+        SharedPreferences preferences = this.context.getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE);
+        SharedPreferences.Editor edit = preferences.edit();
+
+        edit.putString(BRIDGE_ID_KEY, bridgeId);
+        edit.commit();
+    }
+
+    public String getBridgeId() {
+        SharedPreferences preferences = this.context.getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE);
+        return preferences.getString(BRIDGE_ID_KEY, null);
+    }
+
+    public void setBridgeConnectionId(String connectionId) {
+        SharedPreferences preferences = this.context.getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE);
+        SharedPreferences.Editor edit = preferences.edit();
+
+        edit.putString(BRIDGE_CONNECTION_ID_KEY, connectionId);
+        edit.commit();
+    }
+
+    public String getBridgeConnectionId() {
+        SharedPreferences preferences = this.context.getSharedPreferences(PREFERENCES_NAME, MODE_PRIVATE);
+        return preferences.getString(BRIDGE_CONNECTION_ID_KEY, null);
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/DeckPreviewActivity.java

@@ -2,36 +2,158 @@ package com.codigoparallevar.minicards;
 
 import android.app.Dialog;
 import android.content.DialogInterface;
+import android.content.Intent;
+import android.os.AsyncTask;
 import android.os.Bundle;
-import android.support.design.widget.FloatingActionButton;
-import android.support.v7.app.AlertDialog;
-import android.support.v7.widget.Toolbar;
+import android.text.Editable;
+import android.text.TextWatcher;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
+import android.widget.Button;
 import android.widget.EditText;
 import android.widget.ListView;
+import android.widget.TextView;
 import android.widget.Toast;
 
+import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.widget.Toolbar;
+
+import com.codigoparallevar.minicards.bridge.ProgramakerBridgeService;
+import com.codigoparallevar.minicards.types.functional.Consumer;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple3;
+import com.codigoparallevar.minicards.ui_helpers.GetAsync;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.programaker.api.ProgramakerApi;
+
 import java.io.File;
 import java.io.IOException;
 import java.util.List;
 import java.util.Vector;
 
 public class DeckPreviewActivity extends ReloadableAppCompatActivity {
-
     public static final String INTENT = "com.codigoparallevar.minicards.DECK";
+    private static final String LogTag = "DeckPreview";
+
     private ListView listView;
     private CardPreviewArrayAdapter cardArrayAdapter;
+    private ProgramakerApi ProgramakerApi;
+    private ConfigManager Config;
+
+    protected void openLoginDialog(View view) {
+        AlertDialog.Builder builder = new AlertDialog.Builder(this);
+
+        final View loginDialog = (LayoutInflater.from(this)
+                .inflate(R.layout.login_dialog_view, null));
+
+        final EditText loginUsernameText = loginDialog.findViewById(R.id.login_username_text);
+        final EditText loginPasswordText = loginDialog.findViewById(R.id.login_password_text);
+        final Button loginButton = loginDialog.findViewById(R.id.login_dialog_login_button);
+        final Button cancelButton = loginDialog.findViewById(R.id.login_dialog_cancel_button);
+        final TextView messageLabel = loginDialog.findViewById(R.id.login_message_label);
+
+        builder.setTitle("Login").setView(loginDialog);
+        final Dialog dialog = builder.create();
+        dialog.show();
+
+        cancelButton.setOnClickListener(new View.OnClickListener(){
+            @Override
+            public void onClick(View v) {
+                dialog.cancel();
+            }
+        });
+
+        final TextWatcher watcher = (new TextWatcher() {
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {}
+
+            @Override
+            public void afterTextChanged(Editable s) {
+                if ((messageLabel.getVisibility() != View.VISIBLE) &&
+                        (loginUsernameText.getText().length() > 0) &&
+                        (loginPasswordText.getText().length() > 0)) {
+                    loginButton.setEnabled(true);
+                } else {
+                    loginButton.setEnabled(false);
+                }
+            }
+        });
+
+        loginButton.setEnabled(false);
+        loginUsernameText.addTextChangedListener(watcher);
+        loginPasswordText.addTextChangedListener(watcher);
+
+        loginButton.setOnClickListener(new View.OnClickListener(){
+            @Override
+            public void onClick(View v) {
+                messageLabel.setVisibility(View.VISIBLE);
+                messageLabel.setText(R.string.loading);
+                new CheckLogin().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,
+                        new Tuple3<>(
+                                loginUsernameText.getText().toString(),
+                                loginPasswordText.getText().toString(),
+                                token -> {
+                                    if (token == null) {
+                                        messageLabel.setText(R.string.invalid_user_pass);
+                                    } else {
+                                        DeckPreviewActivity.this.Config.setToken(token);
+                                        DeckPreviewActivity.this.ProgramakerApi.setToken(token);
+                                        final Button loginToProgramakerButton = findViewById(R.id.login_in_programaker_button);
+
+                                        loginToProgramakerButton.setVisibility(View.GONE);
+                                        // Re-check... just in case
+                                        checkNeededLoginButton(
+                                                DeckPreviewActivity.this.ProgramakerApi,
+                                                loginToProgramakerButton);
+                                        dialog.cancel();
+                                    }
+                                }));
+            }
+        });
+    }
+
+    static class CheckLogin extends  AsyncTask<Tuple3<String, String, Consumer<String>>,
+            Void, Tuple2<String, Consumer<String>>>{
+        @Override
+        protected Tuple2<String, Consumer<String>> doInBackground(Tuple3<String, String, Consumer<String>>... tuples) {
+            ProgramakerApi api = new ProgramakerApi();
+            String token = null;
+            try {
+                token = api.login(tuples[0]._x, tuples[0]._y);
+            }
+            catch (Exception e) {
+                Log.e("Login to PrograMaker", e.toString(), e);
+            }
+            return new Tuple2<>(token, tuples[0]._z);
+        }
+
+        @Override
+        protected void onPostExecute(Tuple2<String, Consumer<String>> result) {
+            try {
+                result.item2.apply(result.item1);
+            }
+            catch (Throwable ex) {
+                Log.e(LogTag, "Error on login UI update", ex);
+            }
+        }
+    }
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+
+        this.Config = new ConfigManager(this);
+        this.ProgramakerApi = new ProgramakerApi();
+
         setContentView(R.layout.activity_deck_preview);
-        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        Toolbar toolbar = findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
 
-        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.create_new_card_fab);
+        FloatingActionButton fab = findViewById(R.id.create_new_card_fab);
         fab.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
@@ -39,7 +161,43 @@ public class DeckPreviewActivity extends ReloadableAppCompatActivity {
             }
         });
 
-        listView = (ListView) findViewById(R.id.card_deck_list);
+        final Button loginButton = findViewById(R.id.login_in_programaker_button);
+        loginButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                DeckPreviewActivity.this.openLoginDialog(v);
+            }
+       });
+
+        listView = findViewById(R.id.card_deck_list);
+        String token = this.Config.getToken();
+        if (token == null) {
+            loginButton.setVisibility(View.VISIBLE);
+        }
+        else {
+
+            this.ProgramakerApi.setToken(token);
+            loginButton.setVisibility(View.GONE);
+            // Double check that is not needed, token might have been deleted
+            checkNeededLoginButton(this.ProgramakerApi, loginButton);
+        }
+    }
+
+    private void checkNeededLoginButton(ProgramakerApi api, Button loginButton) {
+        new GetAsync<Boolean>().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,
+                new Tuple3<>(
+                        () -> api.check(),
+                        result -> {
+                            if (!result) {
+                                loginButton.setVisibility(View.VISIBLE);
+                                DeckPreviewActivity.this.Config.removeBridgeId();
+                            } else {
+                                Intent intent = new Intent(this, ProgramakerBridgeService.class);
+                                startService(intent);
+                            }
+                        },
+                        ex -> Log.e(LogTag, "Error checking API:" + ex, ex)
+                ));
     }
 
     @Override
@@ -61,7 +219,7 @@ public class DeckPreviewActivity extends ReloadableAppCompatActivity {
         final View openCardOptions = (LayoutInflater.from(this)
                 .inflate(R.layout.create_new_card_view, null));
 
-        final EditText cardNameEditText = (EditText) openCardOptions.findViewById(R.id.card_name_edit_text);
+        final EditText cardNameEditText = openCardOptions.findViewById(R.id.card_name_edit_text);
 
         builder.setTitle("Create a new card")
                 .setView(openCardOptions)

app/src/main/java/com/codigoparallevar/minicards/PartInstantiator.java

@@ -2,7 +2,7 @@ package com.codigoparallevar.minicards;
 
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 
 public abstract class PartInstantiator {
     protected abstract Part instantiate(PartGrid grid, Tuple2<Integer, Integer> center);

app/src/main/java/com/codigoparallevar/minicards/PartsHolder.java

@@ -1,67 +0,0 @@
-package com.codigoparallevar.minicards;
-
-import android.app.Dialog;
-import android.content.Context;
-import android.content.DialogInterface;
-import android.support.v7.app.AlertDialog;
-import android.util.Log;
-
-import com.codigoparallevar.minicards.parts.buttons.RoundButton;
-import com.codigoparallevar.minicards.parts.logic.Ticker;
-import com.codigoparallevar.minicards.parts.logic.Toggle;
-import com.codigoparallevar.minicards.parts.samples.ColorBox;
-import com.codigoparallevar.minicards.parts.strings.ConvertToString;
-import com.codigoparallevar.minicards.types.Part;
-import com.codigoparallevar.minicards.types.Tuple2;
-
-import java.util.List;
-import java.util.Vector;
-
-class PartsHolder {
-    private final Context context;
-
-    private final static List<Tuple2<String, PartInstantiator>> BuiltInParts =
-            new Vector<Tuple2<String, PartInstantiator>>(){{
-                add(new Tuple2<>("Round button", RoundButton.getInstantiator()));
-                add(new Tuple2<>("Ticker", Ticker.getInstantiator()));
-                add(new Tuple2<>("Red/Green box", ColorBox.getInstantiator()));
-                add(new Tuple2<>("Toggle", Toggle.getInstantiator()));
-                add(new Tuple2<>("ToString", ConvertToString.getInstantiator()));
-    }};
-
-    public PartsHolder(Context context) {
-        this.context = context;
-    }
-
-    public void openAddPartModal(final CanvasView canvasView) {
-        AlertDialog.Builder builder = new AlertDialog.Builder(context);
-        builder.setTitle("Choose part type")
-                .setItems(getPartTypes(), new DialogInterface.OnClickListener() {
-                    public void onClick(DialogInterface dialog, int which) {
-                        if ((which >= 0) && (which < BuiltInParts.size())){
-                            Log.d("Minicards partsHolder",
-                                    "Spawning " + BuiltInParts.get(which).item1);
-                            PartInstantiator instantiator = BuiltInParts.get(which).item2;
-                            PartsHolder.this.runInstantiator(instantiator, canvasView);
-                        }
-                    }
-                });
-
-        Dialog dialog = builder.create();
-        dialog.show();
-    }
-
-    private void runInstantiator(PartInstantiator instantiator, CanvasView canvasView) {
-        Part part = instantiator.build(canvasView);
-        canvasView.addPart(part);
-    }
-
-    private static String[] getPartTypes() {
-        String[] partTypes = new String[BuiltInParts.size()];
-        for (int i = 0; i < BuiltInParts.size(); i++){
-            partTypes[i] = BuiltInParts.get(i).item1;
-        }
-
-        return partTypes;
-    }
-}

app/src/main/java/com/codigoparallevar/minicards/ReloadableAppCompatActivity.java

@@ -1,6 +1,6 @@
 package com.codigoparallevar.minicards;
 
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 
 abstract class ReloadableAppCompatActivity extends AppCompatActivity {
     public abstract void reload();

app/src/main/java/com/codigoparallevar/minicards/ScrolledCanvas.java

@@ -4,9 +4,9 @@ import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.Path;
 import android.graphics.Rect;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
 
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 
 public class ScrolledCanvas {
     private final Canvas canvas;

app/src/main/java/com/codigoparallevar/minicards/StubPartGrid.java

@@ -2,10 +2,11 @@ package com.codigoparallevar.minicards;
 
 import com.codigoparallevar.minicards.types.PartGrid;
 import com.codigoparallevar.minicards.types.Selectable;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.input.BooleanInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.SignalInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.StringInputConnector;
+import com.programaker.api.ProgramakerApi;
 
 class StubPartGrid implements PartGrid {
     @Override
@@ -13,6 +14,11 @@ class StubPartGrid implements PartGrid {
         return null;
     }
 
+    @Override
+    public ProgramakerApi getApi() {
+        return null;
+    }
+
     @Override
     public SignalInputConnector getSignalInputConnectorOn(int x, int y) {
         return null;

app/src/main/java/com/codigoparallevar/minicards/bridge/ProgramakerAndroidBridge.java

@@ -0,0 +1,51 @@
+package com.codigoparallevar.minicards.bridge;
+
+import android.content.Context;
+import android.provider.Settings;
+
+import com.codigoparallevar.minicards.ConfigManager;
+import com.codigoparallevar.minicards.bridge.blocks.DefaultAndroidBlocks;
+import com.programaker.bridge.ProgramakerBridge;
+import com.programaker.bridge.ProgramakerBridgeConfiguration;
+
+public class ProgramakerAndroidBridge {
+    private static final String LogTag = "PM Android Bridge";
+    private ProgramakerBridge bridgeRunner = null;
+
+    // Static
+    public static ProgramakerAndroidBridge configure(Context ctx, String userId, String bridgeId) {
+        return new ProgramakerAndroidBridge(ctx, userId, bridgeId);
+    }
+
+    public static String GetBridgeName(Context ctx) {
+        String deviceName = Settings.Secure.getString(ctx.getContentResolver(), "bluetooth_name");
+        String serviceName = "MiniCards on " + deviceName;
+        return serviceName;
+    }
+
+    // Builder
+    private final Context ctx;
+    private final String userId;
+    private final String bridgeId;
+
+    private ProgramakerAndroidBridge(Context ctx, String userId, String bridgeId) {
+        this.ctx = ctx;
+        this.userId = userId;
+        this.bridgeId = bridgeId;
+    }
+
+    public void start(Runnable onReady, Runnable onComplete) {
+        ProgramakerBridgeConfiguration configuration = new ProgramakerBridgeConfiguration(
+                ProgramakerAndroidBridge.GetBridgeName(this.ctx),
+                new ConfigManager(this.ctx),
+                DefaultAndroidBlocks.GetBuilder(this.ctx).Build()
+        );
+
+        this.bridgeRunner = new ProgramakerBridge(this.bridgeId, this.userId, configuration, onReady, onComplete);
+        this.bridgeRunner.run();
+    }
+
+    public void stop() {
+        bridgeRunner.stop();
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/bridge/ProgramakerBridgeService.java

@@ -0,0 +1,213 @@
+package com.codigoparallevar.minicards.bridge;
+
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.os.AsyncTask;
+import android.os.IBinder;
+import android.os.Process;
+import android.util.Log;
+import android.widget.Toast;
+
+import androidx.core.app.NotificationCompat;
+
+import com.codigoparallevar.minicards.ConfigManager;
+import com.codigoparallevar.minicards.R;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.ui_helpers.DoAsync;
+import com.programaker.api.ProgramakerApi;
+
+public class ProgramakerBridgeService extends Service {
+    public static final String BridgeUserNotificationChannel = "PROGRAMAKER_BRIDGE_USER_NOTIFICATION";
+    public static final CharSequence BridgeUserNotificationChannelName = "User notifications";
+    public static String BridgeUserLedsNotificationChannel = "PROGRAMAKER_BRIDGE_USER_LEDS_NOTIFICATION";
+    public static CharSequence BridgeUserLedsNotificationChannelName = "User LEDs";
+
+    private static String BridgeStatusNotificationChannel = "PROGRAMAKER_BRIDGE_STATUS_NOTIFICATION";
+    private static CharSequence BridgeStatusNotificationChannelName = "Programaker bridge status";
+
+    private static final int BridgeStatusNotificationId = 9999;
+    public static final String COMMAND_PROGRAMAKER_BRIDGE_STOP = "com.programaker.bridge.commands.stop";
+    public static final String COMMAND_PROGRAMAKER_BRIDGE_START = "com.programaker.bridge.commands.start";
+
+    private static final long WAIT_TIME_BEFORE_RESTART_MILLIS = 10000; // 10s
+    private ProgramakerAndroidBridge bridge = null;
+    private static final String LogTag = "PM BridgeService";
+    private boolean stopped = false;
+
+    @Override
+    public void onCreate() {
+        setBridgeStatusNotification(getString(R.string.bridge_service_not_started), true);
+    }
+
+    private void setBridgeStatusNotification(String title, boolean stopped) {
+        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+        assert notificationManager != null;
+
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
+            NotificationChannel channel = new NotificationChannel(
+                    ProgramakerBridgeService.BridgeStatusNotificationChannel,
+                    ProgramakerBridgeService.BridgeStatusNotificationChannelName,
+                    NotificationManager.IMPORTANCE_DEFAULT);
+            notificationManager.createNotificationChannel(channel);
+        }
+
+        Intent stopIntent = new Intent(this, ProgramakerBridgeService.class);
+        stopIntent.setAction(COMMAND_PROGRAMAKER_BRIDGE_STOP);
+        PendingIntent stopPendingIntent =
+                PendingIntent.getService(this, 0, stopIntent, 0);
+
+        Intent startIntent = new Intent(this, ProgramakerBridgeService.class);
+        startIntent.setAction(COMMAND_PROGRAMAKER_BRIDGE_START);
+        PendingIntent startPendingIntent =
+                PendingIntent.getService(this, 0, startIntent, 0);
+
+        NotificationCompat.Builder builder = new NotificationCompat
+                .Builder(this, ProgramakerBridgeService.BridgeStatusNotificationChannel)
+                .setContentTitle(title)
+                .setPriority(NotificationCompat.PRIORITY_DEFAULT);
+
+
+        if (stopped) {
+            builder.addAction(R.drawable.ic_start, getString(R.string.start_bridge), startPendingIntent)
+                    .setSmallIcon(R.drawable.ic_vector_stopped_icon);
+        }
+        else {
+            builder.addAction(R.drawable.ic_cancel, getString(R.string.stop_bridge), stopPendingIntent)
+                    .setSmallIcon(R.drawable.ic_vector_icon);
+        }
+
+        Notification notification = builder.build();
+
+        if (stopped) {
+            notificationManager.notify(BridgeStatusNotificationId, notification);
+        }
+        else {
+            this.startForeground(BridgeStatusNotificationId, notification);
+        }
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        String action = intent.getAction();
+        if (action == null) {
+            action = "";
+        }
+
+        if (action.equals(COMMAND_PROGRAMAKER_BRIDGE_STOP)) {
+            this.stopSelf();
+        }
+        else {
+            connectBridge();
+        }
+
+        // If we get killed, after returning from here, restart
+        return START_STICKY;
+    }
+
+    private void connectBridge() {
+        stopped = false;
+        ConfigManager config = new ConfigManager(this);
+
+        String token = config.getToken();
+        if (token == null) {
+            Toast.makeText(this, "Cannot start bridge", Toast.LENGTH_SHORT).show();
+            Log.e(LogTag, "Cannot start bridge: Token is null");
+            this.stopSelf();
+        }
+
+        if (ProgramakerBridgeService.this.bridge != null) {
+            // Toast.makeText(this, "Bridge already started", Toast.LENGTH_SHORT).show();
+            Log.w(LogTag, "Bridge already started (not null)");
+        }
+
+        // Start up the thread running the service. Note that we create a
+        // separate thread because the service normally runs in the process's
+        // main thread, which we don't want to block. We also make it
+        // background priority so CPU-intensive work doesn't disrupt our UI.
+        Thread thread = new Thread(() -> {
+            try {
+                ProgramakerApi api = new ProgramakerApi();
+                api.setToken(token);
+                String userId = api.getUserId();
+
+                String bridgeIdCheck = config.getBridgeId();
+                if (bridgeIdCheck == null) {
+                    bridgeIdCheck = api.createBridge(ProgramakerAndroidBridge.GetBridgeName(this));
+                    config.setBridgeId(bridgeIdCheck);
+                }
+                final String bridgeId = bridgeIdCheck;
+
+                ProgramakerBridgeService.this.bridge = ProgramakerAndroidBridge.configure(
+                        this,
+                        userId,
+                        bridgeId);
+                ProgramakerBridgeService.this.bridge.start(
+                        () -> { // On ready
+                            setBridgeStatusNotification(getString(R.string.bridge_service_online), false);
+                            if (config.getBridgeConnectionId() == null) {
+                                new DoAsync().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,
+                                        new Tuple2<>(
+                                                () -> {
+                                                    boolean established = api.establishConnection(bridgeId);
+                                                    if (!established) {
+                                                        Log.e(LogTag, "Error establishing connection to bridge");
+                                                    }
+                                                },
+                                                ex -> {
+                                                    Log.e(LogTag, "Error establishing bridge connection: " + ex, ex);
+                                                    ProgramakerBridgeService.this.stopSelf();
+                                                }
+                                        )
+                                );
+                            }
+                        },
+                        () -> { // On completed
+                            ProgramakerBridgeService.this.bridge = null;
+                            onBridgeFailedAfterConnected();
+                        });
+            }
+            catch (Throwable ex) {
+                Log.e(LogTag, "Error on bridge", ex);
+                ProgramakerBridgeService.this.bridge = null;
+            }
+        }, "ServiceStartArguments");
+        thread.setPriority(Process.THREAD_PRIORITY_BACKGROUND);
+
+        setBridgeStatusNotification(getString(R.string.bridge_service_starting), false);
+        thread.start();
+    }
+
+    private void onBridgeFailedAfterConnected() {
+        if (!stopped) {
+            Log.e(LogTag, "Bridge stopped after connected. Waiting 10s then restarting");
+            setBridgeStatusNotification(getString(R.string.bridge_service_failed_restarting), false);
+            try {
+                Thread.sleep(WAIT_TIME_BEFORE_RESTART_MILLIS);
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+            connectBridge();
+        }
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        // We don't provide binding, so return null
+        return null;
+    }
+
+    @Override
+    public void onDestroy() {
+        stopped = true;
+        ProgramakerAndroidBridge bridge = this.bridge;
+        if (bridge != null) {
+            bridge.stop();
+        }
+        setBridgeStatusNotification(getString(R.string.bridge_service_failed_stopping), true);
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/bridge/blocks/BlockArgumentDefinition.java

@@ -0,0 +1,51 @@
+package com.codigoparallevar.minicards.bridge.blocks;
+
+import android.util.Log;
+
+import org.jetbrains.annotations.NotNull;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+class BlockArgumentDefinition {
+    private final static String LogTag = "PM BlockArgument";
+    private final Type type;
+    private final String defaultValue;
+
+    public enum Type {
+        STRING,
+        INT,
+        FLOAT,
+        BOOL,
+    }
+
+    BlockArgumentDefinition(BlockArgumentDefinition.Type type, String defaultValue) {
+        this.type = type;
+        this.defaultValue = defaultValue;
+    }
+
+    @NotNull
+    public JSONObject serialize() throws JSONException {
+        JSONObject obj = new JSONObject();
+
+        obj.put("type", BlockArgumentDefinition.TypeToString(type));
+        obj.put("default", this.defaultValue);
+
+        return obj;
+    }
+
+    private static String TypeToString(Type type) {
+        switch (type) {
+            case STRING:
+                return "string";
+            case INT:
+                return "integer";
+            case FLOAT:
+                return "float";
+            case BOOL:
+                return "bool";
+            default:
+                Log.e(LogTag, "Unknown type: " + type);
+                return "string";
+        }
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/bridge/blocks/BridgeBlockListBuilder.java

@@ -0,0 +1,33 @@
+package com.codigoparallevar.minicards.bridge.blocks;
+
+import com.codigoparallevar.minicards.types.functional.Consumer;
+import com.programaker.bridge.ProgramakerBridgeConfigurationBlock;
+
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+
+public class BridgeBlockListBuilder {
+    private final LinkedList<ProgramakerBridgeConfigurationBlock> blockList;
+
+    public BridgeBlockListBuilder() {
+        this.blockList = new LinkedList<>();
+    }
+
+
+    public List<ProgramakerBridgeConfigurationBlock> Build() {
+        return blockList;
+    }
+
+    public BridgeBlockListBuilder addOperation(String id, String message,
+                                               List<BlockArgumentDefinition> arguments,
+                                               Consumer<List<? extends Object>> operation) {
+        return this.addOperation(new OperationBlockDefinition(id, message, arguments, operation));
+    }
+
+    private BridgeBlockListBuilder addOperation(ProgramakerBridgeConfigurationBlock block) {
+        this.blockList.add(block);
+
+        return this;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/bridge/blocks/DefaultAndroidBlocks.java

@@ -0,0 +1,138 @@
+package com.codigoparallevar.minicards.bridge.blocks;
+
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.content.Context;
+import android.graphics.Color;
+import android.os.Build;
+
+import androidx.core.app.NotificationCompat;
+
+import com.codigoparallevar.minicards.R;
+import com.codigoparallevar.minicards.bridge.ProgramakerBridgeService;
+import com.codigoparallevar.minicards.types.functional.Box;
+
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Random;
+
+public class DefaultAndroidBlocks {
+
+    public static BridgeBlockListBuilder GetBuilder(Context ctx) {
+        // System services
+        String notifServiceId = Context.NOTIFICATION_SERVICE;
+        NotificationManager notificationManager = (NotificationManager) ctx.getSystemService(notifServiceId);
+        assert notificationManager != null;
+
+        Random notificationRandom = new Random();
+        int ledsNotificationId = notificationRandom.nextInt();
+        Box<Integer> currentLedArg = new Box<>(0x00000000);
+
+        NotificationChannel channelPreparation = null;
+        NotificationChannel ledsChannelPreparation = null;
+
+        String notificationChannelId = ProgramakerBridgeService.BridgeUserNotificationChannel;
+        String ledsChannelId = ProgramakerBridgeService.BridgeUserLedsNotificationChannel;
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            channelPreparation = new NotificationChannel(
+                    ProgramakerBridgeService.BridgeUserNotificationChannel,
+                    ProgramakerBridgeService.BridgeUserNotificationChannelName,
+                    NotificationManager.IMPORTANCE_DEFAULT);
+            notificationManager.createNotificationChannel(channelPreparation);
+
+            ledsChannelPreparation = new NotificationChannel(
+                    ledsChannelId,
+                    ProgramakerBridgeService.BridgeUserLedsNotificationChannelName,
+                    NotificationManager.IMPORTANCE_DEFAULT);
+
+            ledsChannelPreparation.enableLights(true);
+
+            notificationManager.createNotificationChannel(ledsChannelPreparation);
+        }
+
+        final NotificationChannel notificationChannel = channelPreparation;
+        final NotificationChannel ledsChannel = ledsChannelPreparation;
+        return new BridgeBlockListBuilder()
+                // Notifications
+                .addOperation(
+                        "notifications_new",
+                        "Create notification. Title: %1, text: %2",
+                        new LinkedList<BlockArgumentDefinition>() {{
+                            add(new BlockArgumentDefinition(BlockArgumentDefinition.Type.STRING, "My notification"));
+                            add(new BlockArgumentDefinition(BlockArgumentDefinition.Type.STRING, "Sample description"));
+                        }},
+                        (List<?> params) -> {
+                            if (params.size() != 2) {
+                                throw new Exception("Expected two (2) arguments, found " + params.size());
+                            }
+                            String title = params.get(0).toString();
+                            String description = params.get(1).toString();
+
+                            Notification notif = new NotificationCompat
+                                    .Builder(ctx, ProgramakerBridgeService.BridgeUserNotificationChannel)
+                                    .setContentTitle(title)
+                                    .setContentText(description)
+                                    .setSmallIcon(R.drawable.ic_center_focus_weak_black) // TODO: Change icon
+                                    .setPriority(NotificationCompat.PRIORITY_DEFAULT)
+                                    .build();
+
+                            int notificationId = notificationRandom.nextInt();
+                            notificationManager.notify(notificationId, notif);
+                        }
+                )
+                .addOperation(
+                        "notifications_clear",
+                        "Clear notifications",
+                        Collections.emptyList(),
+                        (List<?> params) -> {
+                            notificationManager.cancelAll();
+                        }
+                )
+                // Leds
+                .addOperation(
+                        "leds_turn_on",
+                        "Set leds to (r:%1,g:%2,b:%3)",
+                        new LinkedList<BlockArgumentDefinition>() {{
+                            add(new BlockArgumentDefinition(BlockArgumentDefinition.Type.INT, "255"));
+                            add(new BlockArgumentDefinition(BlockArgumentDefinition.Type.INT, "255"));
+                            add(new BlockArgumentDefinition(BlockArgumentDefinition.Type.INT, "255"));
+                        }},
+                        params -> {
+                            if (params.size() != 3) {
+                                throw new Exception("Expected three (3) arguments, found " + params.size());
+                            }
+                            String rStr = params.get(0).toString();
+                            String gStr = params.get(1).toString();
+                            String bStr = params.get(2).toString();
+
+                            int r = Math.min(255, Math.max(0, Integer.parseInt(rStr)));
+                            int g = Math.min(255, Math.max(0, Integer.parseInt(gStr)));
+                            int b = Math.min(255, Math.max(0, Integer.parseInt(bStr)));
+
+                            int ledColor = 0x7f * (1<<24) + r * (1 << 16) + g * (1 << 8) + b;
+
+                            Notification notif = new NotificationCompat
+                                    .Builder(ctx, ledsChannelId)
+                                    .setPriority(NotificationCompat.PRIORITY_LOW)
+                                    .setContentTitle(ctx.getString(R.string.leds_notification))
+                                    .setSmallIcon(R.drawable.ic_center_focus_weak_black) // TODO: Change icon
+                                    .setLights(Color.RED, 0, 0)
+                                    .build();
+
+                            notif.ledARGB = Color.RED;
+                            notif.ledOnMS = 300;
+                            notif.ledOffMS = 300;
+
+                            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                                ledsChannel.setLightColor(Color.RED);
+                            }
+
+                            notificationManager.notify(ledsNotificationId, notif);
+                        }
+                )
+                ;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/bridge/blocks/OperationBlockDefinition.java

@@ -0,0 +1,65 @@
+package com.codigoparallevar.minicards.bridge.blocks;
+
+import android.util.Log;
+
+import com.codigoparallevar.minicards.types.functional.Consumer;
+import com.programaker.bridge.ProgramakerBridgeConfigurationBlock;
+
+import org.jetbrains.annotations.NotNull;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.List;
+
+class OperationBlockDefinition implements ProgramakerBridgeConfigurationBlock {
+    private final static String LogTag = "PM OpBlockDefinition";
+
+    private final String id;
+    private final String message;
+    private final List<BlockArgumentDefinition> args;
+    private final Consumer<List<?>> operation;
+
+    public OperationBlockDefinition(String id, String message, List<BlockArgumentDefinition> args, Consumer<List<? extends Object>> operation) {
+        this.id = id;
+        this.message = message;
+        this.args = args;
+        this.operation = operation;
+    }
+
+    @NotNull
+    @Override
+    public JSONObject serialize() {
+        JSONObject obj = new JSONObject();
+
+        try {
+            JSONArray arguments = new JSONArray();
+            for (BlockArgumentDefinition arg : this.args) {
+                arguments.put(arg.serialize());
+            }
+
+            obj.put("id", this.id);
+            obj.put("function_name", this.id);
+            obj.put("message", this.message);
+            obj.put("block_type", "operation");
+            obj.put("block_result_type", JSONObject.NULL);
+            obj.put("arguments", arguments);
+            obj.put("save_to",  JSONObject.NULL);
+        } catch (JSONException ex) {
+            Log.e(LogTag, "Error serializing block definition: " + ex, ex);
+        }
+
+        return obj;
+    }
+
+    @NotNull
+    @Override
+    public String getFunctionName() {
+        return this.id;
+    }
+
+    @Override
+    public void call(@NotNull List<?> arguments) throws Exception {
+        this.operation.apply(arguments);
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/parts/ProgramakerCustomBlockPart.java

@@ -0,0 +1,609 @@
+package com.codigoparallevar.minicards.parts;
+
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.os.AsyncTask;
+import android.util.Log;
+
+import com.codigoparallevar.minicards.ScrolledCanvas;
+import com.codigoparallevar.minicards.parts.connectors.AnyRoundInputConnector;
+import com.codigoparallevar.minicards.parts.connectors.ConnectorTypeInfo;
+import com.codigoparallevar.minicards.parts.connectors.RoundOutputConnector;
+import com.codigoparallevar.minicards.types.Moveable;
+import com.codigoparallevar.minicards.types.Part;
+import com.codigoparallevar.minicards.types.PartConnection;
+import com.codigoparallevar.minicards.types.PartGrid;
+import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
+import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.types.wireData.Signal;
+import com.codigoparallevar.minicards.types.wireData.WireDataType;
+import com.codigoparallevar.minicards.ui_helpers.DoAsync;
+import com.programaker.api.ProgramakerApi;
+import com.programaker.api.data.ProgramakerCustomBlock;
+import com.programaker.api.data.ProgramakerCustomBlockArgument;
+import com.programaker.api.data.ProgramakerCustomBlockSaveTo;
+import com.programaker.api.data.ProgramakerFunctionCallResult;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.UUID;
+
+public class ProgramakerCustomBlockPart implements Part {
+    private static final int WIDTH_PADDING = 50;
+    private static final int HEIGHT_PADDING = 50;
+    private static final int IO_RADIUS = 50;
+    private static final int IO_PADDING = 20;
+    private static final String LogTag = "PM Custom block part";
+
+    private List<Tuple2<ConnectorTypeInfo, AnyRoundInputConnector>> inputConnectors = null;
+    private List<Tuple2<ConnectorTypeInfo, RoundOutputConnector>> outputConnectors = null;
+
+    private final PartGrid _partGrid;
+    private final String _id;
+    private final ProgramakerCustomBlock _block;
+
+    private int _left;
+    private int _top;
+    private int width = 100;
+    private int height = 100;
+    private String token = null;
+    private Object[] lastValues;
+    private boolean active = true;
+    private Tuple2<ConnectorTypeInfo, RoundOutputConnector> saveToOutput;
+    private RoundOutputConnector pulseOutput;
+
+
+    public ProgramakerCustomBlockPart(String id, PartGrid grid, Tuple2<Integer, Integer> center, ProgramakerCustomBlock block) {
+        this._id = id;
+        this._partGrid = grid;
+        this._block = block;
+
+        this.updateWidthHeight();
+
+        this._left = center.item1 - width / 2;
+        this._top = center.item2 - height / 2;
+        this.initialize();
+    }
+
+    private ProgramakerCustomBlockPart(String id, PartGrid grid, int left, int top, ProgramakerCustomBlock block) {
+        this._id = id;
+        this._partGrid = grid;
+        this._block = block;
+
+        this.updateWidthHeight();
+
+        this._left = left;
+        this._top = top;
+        this.initialize();
+    }
+
+    public ProgramakerCustomBlockPart(PartGrid grid, Tuple2<Integer, Integer> center, ProgramakerCustomBlock block) {
+        this(UUID.randomUUID().toString(), grid, center, block);
+    }
+
+    @Override
+    public int get_left() {
+        return _left;
+    }
+
+    @Override
+    public int get_right() {
+        return _left + width;
+    }
+
+    @Override
+    public int get_top() {
+        return _top;
+    }
+
+    @Override
+    public int get_bottom() {
+        return _top + height;
+    }
+
+    private Paint getTextPaint() {
+        Paint p = new Paint(Paint.ANTI_ALIAS_FLAG);
+        p.setColor(Color.BLACK);
+        p.setTextSize(50);
+        return p;
+    }
+
+    private void updateWidthHeight() {
+        Paint p = getTextPaint();
+        String message = getMessage();
+        Rect bounds = new Rect();
+        p.getTextBounds(message, 0, message.length(), bounds);
+
+        this.height = bounds.height() + HEIGHT_PADDING * 2;
+        this.width = bounds.width() + WIDTH_PADDING * 2;
+    }
+
+    private void initialize() {
+        this.updatePorts();
+        lastValues = new Object[this.inputConnectors.size()];
+    }
+
+    private void updatePorts() {
+        final String type = this._block.getBlock_type() == null ? "" : this._block.getBlock_type();
+        final boolean has_pulse_input = type.equals("operation");
+        final boolean has_pulse_output = has_pulse_input || type.equals("trigger");
+        final boolean hasImplicitOutput = type.equals("getter");
+
+        final List<Tuple2<ConnectorTypeInfo, AnyRoundInputConnector>> inputs = new LinkedList<>();
+        final List<Tuple2<ConnectorTypeInfo, RoundOutputConnector>> outputs = new LinkedList<>();
+
+        RoundOutputConnector pulseOutput = null;
+
+        // Add pulses
+        if (has_pulse_input) {
+            inputs.add(new Tuple2<>(new ConnectorTypeInfo(ConnectorTypeInfo.Type.PULSE),
+                    new AnyRoundInputConnector(this, 0, 0,
+                            IO_RADIUS))
+            );
+        }
+        if (has_pulse_output) {
+            pulseOutput = new RoundOutputConnector(this, this._partGrid, 0, 0,
+                    IO_RADIUS);
+            outputs.add(new Tuple2<>(new ConnectorTypeInfo(ConnectorTypeInfo.Type.PULSE),
+                    pulseOutput)
+            );
+        }
+
+        // Add block IO
+        ProgramakerCustomBlockArgument savedTo = null;
+
+        if (_block.getArguments() != null) {
+            ProgramakerCustomBlockSaveTo saveTo = _block.getSave_to();
+            int skip = -1;
+
+            if (saveTo != null) {
+                if (saveTo.getType() != null
+                        && saveTo.getType().equals("argument")) {
+                    skip = saveTo.getIndex();
+                }
+                else {
+                    Log.w(LogTag, "Unknown save-to type=" + saveTo.getType());
+                }
+            }
+
+            int index = -1;
+            for (ProgramakerCustomBlockArgument arg : _block.getArguments()) {
+                index++;
+                if (skip == index) {
+                    savedTo = arg;
+                }
+                else {
+                    inputs.add(new Tuple2<>(ConnectorTypeInfo.FromTypeName(arg.getType()),
+                            new AnyRoundInputConnector(this, 0, 0, IO_RADIUS)));
+                }
+            }
+        }
+
+        Tuple2<ConnectorTypeInfo, RoundOutputConnector> saveToOutput = null;
+
+        if (savedTo != null) {
+            saveToOutput = new Tuple2<>(ConnectorTypeInfo.FromTypeName(savedTo.getType()),
+                    new RoundOutputConnector(this, this._partGrid, 0, 0, IO_RADIUS));
+            outputs.add(saveToOutput);
+        }
+
+        if (hasImplicitOutput) {
+            outputs.add(new Tuple2<>(ConnectorTypeInfo.FromTypeName(_block.getBlock_result_type()),
+                    new RoundOutputConnector(this, this._partGrid, 0, 0, IO_RADIUS)));
+        }
+
+        // Tie everything
+        inputConnectors = inputs;
+        outputConnectors = outputs;
+        this.saveToOutput = saveToOutput;
+        this.pulseOutput = pulseOutput;
+
+        this.updatePortPositions();
+    }
+    
+    private void updatePortPositions() {
+        {
+            // Update inputs
+            int y = get_top();
+            int x = get_left() + IO_PADDING;
+            for (Tuple2<ConnectorTypeInfo, AnyRoundInputConnector> entry : inputConnectors) {
+                InputConnector input = entry.item2;
+                int new_x = x + IO_PADDING + IO_RADIUS / 2;
+                input.updatePosition(new_x, y);
+                x = x + IO_RADIUS * 2 + IO_PADDING * 2;
+            }
+        }
+        {
+            // Update outputs
+            int y = get_bottom();
+            int x = get_left() + IO_PADDING;
+            for (Tuple2<ConnectorTypeInfo, RoundOutputConnector> entry : outputConnectors) {
+                OutputConnector output = entry.item2;
+                int new_x = x + IO_PADDING + IO_RADIUS / 2;
+                output.updatePosition(new_x, y);
+                x = x + IO_RADIUS * 2 + IO_PADDING * 2;
+            }
+        }
+    }
+
+    private String getMessage() {
+        return this._block.getMessage();
+    }
+
+    @Override
+    public void touched() {
+        Log.i(LogTag, "Part touched (block_fun=" + this._block.getFunction_name() + ")");
+    }
+
+    @Override
+    public List<InputConnector> getInputConnectors() {
+        List<InputConnector> result = new ArrayList<>(inputConnectors.size());
+        for (Tuple2<ConnectorTypeInfo, AnyRoundInputConnector> entry : inputConnectors) {
+            result.add(entry.item2);
+        }
+
+        return result;
+    }
+
+    @Override
+    public List<OutputConnector> getOutputConnectors() {
+        List<OutputConnector> result = new ArrayList<>(outputConnectors.size());
+        for (Tuple2<ConnectorTypeInfo, RoundOutputConnector> entry : outputConnectors) {
+            result.add(entry.item2);
+        }
+
+        return result;
+    }
+
+    @Override
+    public JSONObject serialize() throws JSONException {
+        JSONObject serialized = new JSONObject();
+
+        serialized.put("id", _id);
+        serialized.put("left", _left);
+        serialized.put("top", _top);
+
+        JSONObject blockData = _block.serialize();
+        serialized.put("block", blockData);
+
+        serialized.put("on_string_output_connector", serializeConnectionEndpoints());
+
+        return serialized;
+    }
+
+    private JSONArray serializeConnectionEndpoints() {
+        JSONArray serializedData = new JSONArray();
+
+        for (OutputConnector output : getOutputConnectors()) {
+            JSONArray elements = new JSONArray();
+
+            for (Tuple2<String, String> endpoint : (List<Tuple2<String, String>>) output.getConnectionEndpoints()) {
+                elements.put(PartConnection.serializeToJson(endpoint.item1, endpoint.item2));
+            }
+
+            serializedData.put(elements);
+        }
+        return serializedData;
+    }
+
+    public static Tuple2<Part, List<PartConnection>> deserialize(PartGrid grid, JSONObject data) throws JSONException {
+        String id = data.getString("id");
+        int left = data.getInt("left");
+        int top = data.getInt("top");
+
+        JSONObject el = data.getJSONObject("block");
+        ProgramakerCustomBlock block = ProgramakerCustomBlock.deserialize(el);
+        ProgramakerCustomBlockPart part = new ProgramakerCustomBlockPart(id, grid, left, top, block);
+
+        List<PartConnection> connections = new LinkedList<>();
+
+        JSONArray allConnectorOuts = data.optJSONArray("on_string_output_connector");
+        if (allConnectorOuts == null) {
+            allConnectorOuts = new JSONArray();
+        }
+
+        for (int i = 0; i < allConnectorOuts.length(); i++) {
+            JSONArray connectorOuts = allConnectorOuts.getJSONArray(i);
+            Tuple2<ConnectorTypeInfo, RoundOutputConnector> connector = part.outputConnectors.get(i);
+            for (int j = 0; j < connectorOuts.length(); j++) {
+                connections.add(PartConnection.deserialize(
+                        connector.item2, connectorOuts.getJSONObject(j)));
+            }
+        }
+
+        return new Tuple2<>(part, connections);
+    }
+
+
+    @Override
+    public void send(InputConnector inputConnector, WireDataType signal) {
+        // Log.i(LogTag, "Received signal from Input="+inputConnector);
+        ConnectorTypeInfo info = getConnectorInfo(inputConnector);
+        if (info == null) {
+            Log.e(LogTag, "Unknown connector" + inputConnector);
+            return;
+        }
+
+        if (info.get_type() == ConnectorTypeInfo.Type.PULSE) {
+            wrappedRunOperation();
+        }
+        else {
+            int index = getConnectorIndex(inputConnector);
+            if (index < 0) {
+                return;
+            }
+            this.lastValues[index] = signal.get();
+        }
+    }
+
+    private void wrappedRunOperation() {
+        Log.d(LogTag, "Running block function=" + this._block.getFunction_name());
+        String token = this.prepareStart();
+
+        if (token != null) {
+            try {
+                new DoAsync().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,
+                        new Tuple2<>(() -> {
+                            ProgramakerCustomBlockPart.this.runBlockOperation();
+
+                            ProgramakerCustomBlockPart.this.freeBlock(token);
+                        }, ex -> {
+                            Log.w(LogTag, "Error executing function=" + this._block.getFunction_name()
+                                    + "; Error=" + ex, ex);
+                            ProgramakerCustomBlockPart.this.freeBlock(token);
+                        }));
+            }
+            catch (Exception ex) {
+                Log.e(LogTag, "Error executing function=" + this._block.getFunction_name()
+                        + "; Error=" + ex, ex);
+                this.freeBlock(token);
+            }
+        } else {
+            // An execution is in progress, so nothing is done
+        }
+    }
+
+    private void runBlockOperation() {
+        if (!this.active) {
+            Log.w(LogTag, "Trying to run inactive block function=" + this._block.getFunction_name());
+            return;
+        }
+
+        ProgramakerApi api = this._partGrid.getApi();
+        List<String> arguments = new LinkedList<>();
+
+        int index = -1;
+        for (Tuple2<ConnectorTypeInfo, AnyRoundInputConnector> entry : inputConnectors) {
+            index++;
+            if (entry.item1.get_type() == ConnectorTypeInfo.Type.PULSE) {
+                continue;
+            }
+
+            arguments.add(lastValues[index].toString()); // TODO: Do proper type formatting
+        }
+
+        ProgramakerFunctionCallResult result = api.callBlock(this._block, arguments);
+        Log.d(LogTag, "Execution result="+result.getResult());
+
+        onExecutionCompleted(result);
+    }
+
+    private void onExecutionCompleted(ProgramakerFunctionCallResult result) {
+        Tuple2<ConnectorTypeInfo, RoundOutputConnector> savedTo = this.saveToOutput;
+        if (savedTo != null) {
+            // TODO: Fix output typing
+            // savedTo.item2.send((WireDataType<Object>) () -> result.getResult());
+        }
+
+        RoundOutputConnector pulseOutput = this.pulseOutput;
+        if (pulseOutput != null) {
+            pulseOutput.send(new Signal());
+        }
+    }
+
+    private void freeBlock(String token) {
+        tryUpdateBlock(token, null);
+    }
+
+    private String prepareStart() {
+        String token = UUID.randomUUID().toString();
+        if (tryUpdateBlock(null, token)) {
+            return token;
+        }
+        return null;
+    }
+
+    private synchronized boolean tryUpdateBlock(String oldVal, String newVal) {
+        if (this.token == oldVal) {
+            this.token = newVal;
+            return true;
+        }
+        return false;
+    }
+
+
+    @Override
+    public String get_id() {
+        return _id;
+    }
+
+    @Override
+    public InputConnector getConnectorWithId(String inputConnectorId) {
+        if (inputConnectorId.startsWith("index=")) {
+            String[] chunks = inputConnectorId.split("=");
+            if (chunks.length > 1) {
+                Integer index = null;
+                try {
+                    index = Integer.parseInt(chunks[1]);
+                }
+                catch (NumberFormatException ex) {
+                    Log.e(LogTag, "Error parsing connector id="+inputConnectorId, ex);
+                }
+
+                if (index != null && index < inputConnectors.size()) {
+                    return inputConnectors.get(index).item2;
+                }
+            }
+        }
+        return null;
+    }
+
+    private int getConnectorIndex(InputConnector inputConnector) {
+        int index = 0;
+        for (Tuple2<ConnectorTypeInfo, AnyRoundInputConnector> entry : inputConnectors) {
+            if (entry.item2 == inputConnector) {
+                return index;
+            }
+            index++;
+        }
+
+        return -1;
+    }
+
+    @Override
+    public String getConnectorId(InputConnector inputConnector) {
+        int index = getConnectorIndex(inputConnector);
+        if (index < 0 ) {
+            return null;
+        }
+
+        return "index=" + index;
+    }
+
+    public ConnectorTypeInfo getConnectorInfo(InputConnector inputConnector) {
+        for (Tuple2<ConnectorTypeInfo, AnyRoundInputConnector> entry : inputConnectors) {
+            if (entry.item2 == inputConnector) {
+                return entry.item1;
+            }
+        }
+
+        return null;
+    }
+
+    @Override
+    public void resume() {
+        this.active = true;
+    }
+
+    @Override
+    public void pause() {
+        this.active = false;
+    }
+
+    @Override
+    public void draw(ScrolledCanvas canvas, boolean devMode) {
+
+        updateWidthHeight(); // TODO: Remove after the calculations have stabilized
+
+        if (!devMode) {
+            return; // Logic block, don't show on user-mode
+        }
+
+        drawConnectors(canvas);
+        drawWires(canvas, devMode);
+
+        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        paint.setColor(Color.WHITE);
+        canvas.drawRect(
+                new Rect(get_left(), get_top(),
+                        get_right(), get_bottom()),
+                paint);
+
+        Paint textPaint = getTextPaint();
+        canvas.drawText(getMessage(),
+                get_left() + WIDTH_PADDING,
+                get_bottom() - HEIGHT_PADDING,
+                textPaint);
+    }
+
+    private void drawConnectors(ScrolledCanvas canvas) {
+        if (inputConnectors != null) {
+            for (Tuple2<ConnectorTypeInfo, AnyRoundInputConnector> entry : inputConnectors) {
+                Paint outerInputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+                outerInputConnectorPaint.setColor(entry.item1.getOuterColor());
+
+                canvas.drawCircle(
+                        entry.item2.getX(),
+                        entry.item2.getY(),
+                        entry.item2.getRadius(),
+                        outerInputConnectorPaint);
+
+                Paint innerInputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+                innerInputConnectorPaint.setColor(entry.item1.getInnerColor());
+
+                canvas.drawCircle(
+                        entry.item2.getX(),
+                        entry.item2.getY(),
+                        entry.item2.getRadius() / 2,
+                        innerInputConnectorPaint);
+            }
+        }
+
+        if (outputConnectors != null) {
+            for (Tuple2<ConnectorTypeInfo, RoundOutputConnector> entry : outputConnectors) {
+                Paint outerOutputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+                outerOutputConnectorPaint.setColor(entry.item1.getOuterColor());
+
+                canvas.drawCircle(
+                        entry.item2.getX(),
+                        entry.item2.getY(),
+                        entry.item2.getRadius(),
+                        outerOutputConnectorPaint);
+
+                Paint innerOutputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+                innerOutputConnectorPaint.setColor(entry.item1.getInnerColor());
+
+                canvas.drawCircle(
+                        entry.item2.getX(),
+                        entry.item2.getY(),
+                        entry.item2.getRadius() / 2,
+                        innerOutputConnectorPaint);
+            }
+        }
+    }
+
+    private void drawWires(ScrolledCanvas canvas, boolean devMode) {
+        for (OutputConnector outputConnector : getOutputConnectors()){
+            outputConnector.drawWires(canvas, devMode);
+        }
+    }
+
+    @Override
+    public void moveEnd(int x, int y) {
+        _left = x - width / 2;
+        _top = y - height / 2;
+
+        this.updatePortPositions();
+    }
+
+    @Override
+    public void drop(int x, int y) {
+        moveEnd(x, y);
+    }
+
+    @Override
+    public boolean containsPoint(int x, int y) {
+        return ((x >= this.get_left()) && (x <= this.get_right())
+                && (y >= this.get_top()) && (y <= this.get_bottom()));
+    }
+
+    @Override
+    public Moveable getMoveable() {
+        return this;
+    }
+
+    @Override
+    public void unlink() {
+        this.active = false;
+        for (InputConnector input : getInputConnectors()) {
+            input.unlink();
+        }
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/parts/buttons/RoundButton.java

@@ -7,11 +7,12 @@ import android.util.Log;
 import com.codigoparallevar.minicards.PartInstantiator;
 import com.codigoparallevar.minicards.ScrolledCanvas;
 import com.codigoparallevar.minicards.parts.connectors.RoundOutputConnector;
+import com.codigoparallevar.minicards.parts.style.CardTheme;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartConnection;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
 import com.codigoparallevar.minicards.types.wireData.Signal;
@@ -106,20 +107,27 @@ public class RoundButton implements Part {
     }
 
     private void drawConnector(ScrolledCanvas canvas) {
-        Paint connectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        connectorPaint.setColor(Color.RED);
+        Paint outerConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outerConnectorPaint.setColor(CardTheme.PULSE_CONNECTOR_COLOR_OUTER);
 
         canvas.drawCircle(getOutputConnectorCenterX(), getOutputConnectorCenterY(),
                 getOutputConnectRadius(),
-                connectorPaint);
+                outerConnectorPaint);
+
+        Paint innerConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        innerConnectorPaint.setColor(CardTheme.PULSE_CONNECTOR_COLOR_INNER);
+
+        canvas.drawCircle(getOutputConnectorCenterX(), getOutputConnectorCenterY(),
+                getOutputConnectRadius() / 2,
+                innerConnectorPaint);
     }
 
     private int getOutputConnectorCenterX() {
-        return _xCenter + _outerRadius;
+        return _xCenter;
     }
 
     private int getOutputConnectorCenterY() {
-        return _yCenter;
+        return _yCenter +  _outerRadius;
     }
 
     private int getOutputConnectRadius() {

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/AnyRoundInputConnector.java

@@ -65,6 +65,10 @@ public class AnyRoundInputConnector extends AnyInputConnector {
         return _yposition;
     }
 
+    public float getRadius() {
+        return _radius;
+    }
+
     @Override
     public void send(WireDataType signal) {
         _part.send(this, signal);

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/BooleanRoundOutputConnector.java

@@ -7,7 +7,7 @@ import com.codigoparallevar.minicards.types.Drawable;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.Wiring.BooleanWire;
 import com.codigoparallevar.minicards.types.connectors.input.BooleanInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/ConnectorTypeInfo.java

@@ -0,0 +1,105 @@
+package com.codigoparallevar.minicards.parts.connectors;
+
+import com.codigoparallevar.minicards.parts.style.CardTheme;
+
+public class ConnectorTypeInfo {
+    private final Type _type;
+
+    public static ConnectorTypeInfo FromTypeName(String type) {
+        if (type == null) {
+            return new ConnectorTypeInfo(Type.UNKNOWN);
+        }
+
+        type = type.toLowerCase();
+        if (type.equals("string")) {
+            return new ConnectorTypeInfo(Type.STRING);
+        }
+        else if (type.equals("integer")) {
+            return new ConnectorTypeInfo(Type.INTEGER);
+        }
+        else if (type.equals("float")) {
+            return new ConnectorTypeInfo(Type.FLOAT);
+        }
+        else if (type.equals("boolean")) {
+            return new ConnectorTypeInfo(Type.BOOLEAN);
+        }
+        else if (type.equals("pulse")) {
+            return new ConnectorTypeInfo(Type.PULSE);
+        }
+        else if (type.equals("enum")) {
+            return new ConnectorTypeInfo(Type.ENUM);
+        }
+        else if (type.equals("any")) {
+            return new ConnectorTypeInfo(Type.ANY);
+        }
+        else {
+            return new ConnectorTypeInfo(Type.UNKNOWN);
+        }
+    }
+
+    public int getOuterColor() {
+        switch (_type) {
+            case ANY:
+                return CardTheme.ANY_CONNECTOR_COLOR_OUTER;
+            case ENUM:
+                return CardTheme.ENUM_CONNECTOR_COLOR_OUTER;
+            case FLOAT:
+                return CardTheme.FLOAT_CONNECTOR_COLOR_OUTER;
+            case PULSE:
+                return CardTheme.PULSE_CONNECTOR_COLOR_OUTER;
+            case STRING:
+                return CardTheme.STRING_CONNECTOR_COLOR_OUTER;
+            case BOOLEAN:
+                return CardTheme.BOOLEAN_CONNECTOR_COLOR_OUTER;
+            case INTEGER:
+                return CardTheme.INTEGER_CONNECTOR_COLOR_OUTER;
+            case UNKNOWN:
+                return CardTheme.UNKNOWN_CONNECTOR_COLOR_OUTER;
+            default:
+                return CardTheme.UNKNOWN_CONNECTOR_COLOR_OUTER;
+        }
+    }
+
+
+    public int getInnerColor() {
+        switch (_type) {
+            case ANY:
+                return CardTheme.ANY_CONNECTOR_COLOR_INNER;
+            case ENUM:
+                return CardTheme.ENUM_CONNECTOR_COLOR_INNER;
+            case FLOAT:
+                return CardTheme.FLOAT_CONNECTOR_COLOR_INNER;
+            case PULSE:
+                return CardTheme.PULSE_CONNECTOR_COLOR_INNER;
+            case STRING:
+                return CardTheme.STRING_CONNECTOR_COLOR_INNER;
+            case BOOLEAN:
+                return CardTheme.BOOLEAN_CONNECTOR_COLOR_INNER;
+            case INTEGER:
+                return CardTheme.INTEGER_CONNECTOR_COLOR_INNER;
+            case UNKNOWN:
+                return CardTheme.UNKNOWN_CONNECTOR_COLOR_INNER;
+            default:
+                return CardTheme.UNKNOWN_CONNECTOR_COLOR_INNER;
+        }
+    }
+
+    public enum Type {
+        PULSE,
+        BOOLEAN,
+        STRING,
+        ANY,
+        ENUM,
+        UNKNOWN,
+        FLOAT,
+        INTEGER,
+    }
+
+    public ConnectorTypeInfo(ConnectorTypeInfo.Type type) {
+        this._type = type;
+    }
+
+    public Type get_type() {
+        return _type;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/RoundInputConnector.java

@@ -65,12 +65,15 @@ public class RoundInputConnector implements SignalInputConnector {
         return _yposition;
     }
 
+    public float getRadius() {
+        return _radius;
+    }
+
     @Override
     public void send(Signal signal) {
         _part.send(this, signal);
     }
 
-
     @Override
     public void getAttachment(Wire<Signal, SignalInputConnector> wire) {
         _attachments.add(wire);

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/RoundOutputConnector.java

@@ -7,7 +7,7 @@ import com.codigoparallevar.minicards.types.Drawable;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.Wiring.SignalWire;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.SignalInputConnector;
@@ -155,4 +155,16 @@ public class RoundOutputConnector implements Drawable, SignalOutputConnector {
             wire.send(signal);
         }
     }
+
+    public float getX() {
+        return _centerX;
+    }
+
+    public float getY() {
+        return _centerY;
+    }
+
+    public float getRadius() {
+        return _radius;
+    }
 }

app/src/main/java/com/codigoparallevar/minicards/parts/connectors/StringRoundOutputConnector.java

@@ -7,7 +7,7 @@ import com.codigoparallevar.minicards.types.Drawable;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.Wiring.StringWire;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.StringInputConnector;

app/src/main/java/com/codigoparallevar/minicards/parts/logic/Ticker.java

@@ -8,11 +8,12 @@ import android.util.Log;
 import com.codigoparallevar.minicards.PartInstantiator;
 import com.codigoparallevar.minicards.ScrolledCanvas;
 import com.codigoparallevar.minicards.parts.connectors.RoundOutputConnector;
+import com.codigoparallevar.minicards.parts.style.CardTheme;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartConnection;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
 import com.codigoparallevar.minicards.types.wireData.Signal;
@@ -144,12 +145,21 @@ public class Ticker implements Part {
     }
 
     private void drawConnector(ScrolledCanvas canvas) {
-        Paint connectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        connectorPaint.setColor(Color.RED);
+        Paint outerConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outerConnectorPaint.setColor(CardTheme.PULSE_CONNECTOR_COLOR_OUTER);
 
-        canvas.drawCircle(_right, getOutputConnectorCenterY(),
+        canvas.drawCircle(getOutputConnectorCenterX(),
+                getOutputConnectorCenterY(),
                 getOutputConnectRadius(),
-                connectorPaint);
+                outerConnectorPaint);
+
+        Paint innerConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        innerConnectorPaint.setColor(CardTheme.PULSE_CONNECTOR_COLOR_INNER);
+
+        canvas.drawCircle(getOutputConnectorCenterX(),
+                getOutputConnectorCenterY(),
+                getOutputConnectRadius() / 2,
+                innerConnectorPaint);
     }
 
     private void drawWires(ScrolledCanvas canvas, boolean devMode) {
@@ -289,11 +299,11 @@ public class Ticker implements Part {
 
 
     private int getOutputConnectorCenterX() {
-        return _right;
+        return (_left + _right) / 2;
     }
 
     private int getOutputConnectorCenterY() {
-        return (_top + _bottom) / 2;
+        return _bottom;
     }
 
     private int getOutputConnectRadius() {

app/src/main/java/com/codigoparallevar/minicards/parts/logic/Toggle.java

@@ -9,11 +9,12 @@ import com.codigoparallevar.minicards.PartInstantiator;
 import com.codigoparallevar.minicards.ScrolledCanvas;
 import com.codigoparallevar.minicards.parts.connectors.BooleanRoundOutputConnector;
 import com.codigoparallevar.minicards.parts.connectors.RoundInputConnector;
+import com.codigoparallevar.minicards.parts.style.CardTheme;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartConnection;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.SignalInputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
@@ -128,20 +129,41 @@ public class Toggle implements Part {
     }
 
     private void drawConnector(ScrolledCanvas canvas) {
-        Paint inputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        inputConnectorPaint.setColor(Color.YELLOW);
+        // Input
+        Paint outerInputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outerInputConnectorPaint.setColor(CardTheme.PULSE_CONNECTOR_COLOR_OUTER);
 
         canvas.drawCircle(
-                getInputConnectorCenterX(), getInputConnectorCenterY(),
+                getInputConnectorCenterX(),
+                getInputConnectorCenterY(),
                 getInputConnectRadius(),
-                inputConnectorPaint);
+                outerInputConnectorPaint);
 
-        Paint outputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        outputConnectorPaint.setColor(Color.RED);
+        Paint innerInputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        innerInputConnectorPaint.setColor(CardTheme.PULSE_CONNECTOR_COLOR_INNER);
 
-        canvas.drawCircle(_right, getOutputConnectorCenterY(),
+        canvas.drawCircle(
+                getInputConnectorCenterX(),
+                getInputConnectorCenterY(),
+                getInputConnectRadius() / 2,
+                innerInputConnectorPaint);
+
+        // Output
+        Paint outerOutputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outerOutputConnectorPaint.setColor(CardTheme.BOOLEAN_CONNECTOR_COLOR_OUTER);
+
+        canvas.drawCircle(getOutputConnectorCenterX(),
+                getOutputConnectorCenterY(),
                 getOutputConnectRadius(),
-                outputConnectorPaint);
+                outerOutputConnectorPaint);
+
+        Paint innerOutputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        innerOutputConnectorPaint.setColor(CardTheme.BOOLEAN_CONNECTOR_COLOR_INNER);
+
+        canvas.drawCircle(getOutputConnectorCenterX(),
+                getOutputConnectorCenterY(),
+                getOutputConnectRadius() / 2,
+                innerOutputConnectorPaint);
     }
 
     private void drawWires(ScrolledCanvas canvas, boolean devMode) {
@@ -306,7 +328,7 @@ public class Toggle implements Part {
     }
 
     public int getInputConnectorCenterX() {
-        return get_left();
+        return (get_left() + get_right()) / 2;
     }
 
     private int getInputConnectRadius() {
@@ -314,15 +336,15 @@ public class Toggle implements Part {
     }
 
     public int getInputConnectorCenterY() {
-        return (get_top() + get_bottom()) / 2;
+        return get_top();
     }
 
     private int getOutputConnectorCenterX() {
-        return _right;
+        return (get_left() + get_right()) / 2;
     }
 
     private int getOutputConnectorCenterY() {
-        return (_top + _bottom) / 2;
+        return get_bottom();
     }
 
     private int getOutputConnectRadius() {

app/src/main/java/com/codigoparallevar/minicards/parts/samples/ColorBox.java

@@ -8,10 +8,11 @@ import android.util.Log;
 import com.codigoparallevar.minicards.PartInstantiator;
 import com.codigoparallevar.minicards.ScrolledCanvas;
 import com.codigoparallevar.minicards.parts.connectors.BooleanRoundInputConnector;
+import com.codigoparallevar.minicards.parts.style.CardTheme;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.input.BooleanInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
@@ -105,13 +106,23 @@ public class ColorBox implements Part {
     }
 
     private void drawConnector(ScrolledCanvas canvas) {
-        Paint connectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        connectorPaint.setColor(Color.YELLOW);
+        Paint outerInputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outerInputConnectorPaint.setColor(CardTheme.BOOLEAN_CONNECTOR_COLOR_OUTER);
 
         canvas.drawCircle(
-                getInputConnectorCenterX(), getInputConnectorCenterY(),
+                getInputConnectorCenterX(),
+                getInputConnectorCenterY(),
                 getInputConnectRadius(),
-                connectorPaint);
+                outerInputConnectorPaint);
+
+        Paint innerInputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        innerInputConnectorPaint.setColor(CardTheme.BOOLEAN_CONNECTOR_COLOR_INNER);
+
+        canvas.drawCircle(
+                getInputConnectorCenterX(),
+                getInputConnectorCenterY(),
+                getInputConnectRadius() / 2,
+                innerInputConnectorPaint);
     }
 
     @Override
@@ -238,7 +249,7 @@ public class ColorBox implements Part {
     }
 
     public int getInputConnectorCenterX() {
-        return get_left();
+        return (get_left() + get_right()) / 2;
     }
 
     private int getInputConnectRadius() {
@@ -246,7 +257,7 @@ public class ColorBox implements Part {
     }
 
     public int getInputConnectorCenterY() {
-        return (get_top() + get_bottom()) / 2;
+        return get_top();
     }
 
     public static PartInstantiator getInstantiator() {

app/src/main/java/com/codigoparallevar/minicards/parts/strings/ConvertToString.java

@@ -3,21 +3,23 @@ package com.codigoparallevar.minicards.parts.strings;
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.Rect;
-import android.support.annotation.NonNull;
 import android.util.Log;
 
+import androidx.annotation.NonNull;
+
 import com.codigoparallevar.minicards.PartInstantiator;
 import com.codigoparallevar.minicards.ScrolledCanvas;
 import com.codigoparallevar.minicards.parts.connectors.AnyRoundInputConnector;
 import com.codigoparallevar.minicards.parts.connectors.StringRoundOutputConnector;
+import com.codigoparallevar.minicards.parts.style.CardTheme;
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;
 import com.codigoparallevar.minicards.types.PartConnection;
 import com.codigoparallevar.minicards.types.PartGrid;
-import com.codigoparallevar.minicards.types.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.input.AnyInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
 import com.codigoparallevar.minicards.types.connectors.output.OutputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.wireData.StringSignal;
 import com.codigoparallevar.minicards.types.wireData.WireDataType;
 import com.codigoparallevar.minicards.utils.Serializations;
@@ -110,7 +112,7 @@ public class ConvertToString implements Part {
             drawWires(canvas, devMode);
 
             Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
-            paint.setColor(Color.WHITE);
+            paint.setColor(Color.BLACK);
             canvas.drawRect(
                     new Rect(_left, _top,
                             _right, _bottom),
@@ -120,27 +122,48 @@ public class ConvertToString implements Part {
             textPaint.setColor(Color.GREEN);
             textPaint.setTextSize(100);
             canvas.drawText(_lastValue,
-                    _left,
-                    _top - 5,
+                    _left + 10,
+                    _bottom - 10,
                     textPaint);
         }
     }
 
     private void drawConnector(ScrolledCanvas canvas) {
-        Paint inputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        inputConnectorPaint.setColor(Color.YELLOW);
+        // Input
+        Paint inputOuterConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        inputOuterConnectorPaint.setColor(CardTheme.ANY_CONNECTOR_COLOR_OUTER);
 
         canvas.drawCircle(
-                getInputConnectorCenterX(), getInputConnectorCenterY(),
+                getInputConnectorCenterX(),
+                getInputConnectorCenterY(),
                 getInputConnectRadius(),
-                inputConnectorPaint);
+                inputOuterConnectorPaint);
 
-        Paint outputConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        outputConnectorPaint.setColor(Color.RED);
+        Paint inputInnerConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        inputInnerConnectorPaint.setColor(CardTheme.ANY_CONNECTOR_COLOR_INNER);
 
-        canvas.drawCircle(_right, getOutputConnectorCenterY(),
+        canvas.drawCircle(
+                getInputConnectorCenterX(),
+                getInputConnectorCenterY(),
+                getInputConnectRadius() / 2,
+                inputInnerConnectorPaint);
+
+        // Output
+        Paint outputOuterConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outputOuterConnectorPaint.setColor(CardTheme.STRING_CONNECTOR_COLOR_OUTER);
+
+        canvas.drawCircle(getOutputConnectorCenterX(),
+                getOutputConnectorCenterY(),
                 getOutputConnectRadius(),
-                outputConnectorPaint);
+                outputOuterConnectorPaint);
+
+        Paint outputInnerConnectorPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+        outputInnerConnectorPaint.setColor(CardTheme.STRING_CONNECTOR_COLOR_INNER);
+
+        canvas.drawCircle(getOutputConnectorCenterX(),
+                getOutputConnectorCenterY(),
+                getOutputConnectRadius() / 2,
+                outputInnerConnectorPaint);
     }
 
     private void drawWires(ScrolledCanvas canvas, boolean devMode) {
@@ -228,7 +251,6 @@ public class ConvertToString implements Part {
     public void send(InputConnector roundInputConnector, WireDataType signal) {
         String encoded = "null";
         Object value = signal.get();
-
         if (value != null){
             encoded = value.toString();
         }
@@ -315,7 +337,7 @@ public class ConvertToString implements Part {
     }
 
     public int getInputConnectorCenterX() {
-        return get_left();
+        return (get_left() + get_right()) / 2;
     }
 
     private int getInputConnectRadius() {
@@ -323,15 +345,15 @@ public class ConvertToString implements Part {
     }
 
     public int getInputConnectorCenterY() {
-        return (get_top() + get_bottom()) / 2;
+        return get_top();
     }
 
     private int getOutputConnectorCenterX() {
-        return _right;
+        return (get_left() + get_right()) / 2;
     }
 
     private int getOutputConnectorCenterY() {
-        return (_top + _bottom) / 2;
+        return get_bottom();
     }
 
     private int getOutputConnectRadius() {

app/src/main/java/com/codigoparallevar/minicards/parts/style/CardTheme.java

@@ -0,0 +1,31 @@
+package com.codigoparallevar.minicards.parts.style;
+
+import android.graphics.Color;
+
+public class CardTheme {
+    public static final int DEFAULT_COLOR_INNER = Color.parseColor("#000000");
+
+    public static final int PULSE_CONNECTOR_COLOR_OUTER = Color.parseColor("#f0c000");
+    public static final int PULSE_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+
+    public static final int BOOLEAN_CONNECTOR_COLOR_OUTER = Color.parseColor("#dd4444");
+    public static final int BOOLEAN_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+
+    public static final int STRING_CONNECTOR_COLOR_OUTER = Color.parseColor("#44dd44");
+    public static final int STRING_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+
+    public static final int ANY_CONNECTOR_COLOR_OUTER = Color.parseColor("#dd44dd");
+    public static final int ANY_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+
+    public static final int ENUM_CONNECTOR_COLOR_OUTER = Color.parseColor("#888888");
+    public static final int ENUM_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+
+    public static final int FLOAT_CONNECTOR_COLOR_OUTER = Color.parseColor("#44dddd");
+    public static final int FLOAT_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+
+    public static final int INTEGER_CONNECTOR_COLOR_OUTER = Color.parseColor("#4444ff");
+    public static final int INTEGER_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+
+    public static final int UNKNOWN_CONNECTOR_COLOR_OUTER = Color.parseColor("#7f7f7f");
+    public static final int UNKNOWN_CONNECTOR_COLOR_INNER = DEFAULT_COLOR_INNER;
+}

app/src/main/java/com/codigoparallevar/minicards/toolbox/PartCategory.java

@@ -0,0 +1,24 @@
+package com.codigoparallevar.minicards.toolbox;
+
+import com.codigoparallevar.minicards.PartInstantiator;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+
+import java.util.List;
+
+class PartCategory {
+    private final String _name;
+    private final List<Tuple2<String, PartInstantiator>> _parts;
+
+    public PartCategory(String name, List<Tuple2<String, PartInstantiator>> parts) {
+        this._name = name;
+        this._parts = parts;
+    }
+
+    public String getName() {
+        return _name;
+    }
+
+    public List<Tuple2<String, PartInstantiator>> getParts() {
+        return this._parts;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/toolbox/PartsHolder.java

@@ -0,0 +1,132 @@
+package com.codigoparallevar.minicards.toolbox;
+
+import android.app.Dialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import androidx.appcompat.app.AlertDialog;
+import android.util.Log;
+
+import com.codigoparallevar.minicards.CanvasView;
+import com.codigoparallevar.minicards.PartInstantiator;
+import com.codigoparallevar.minicards.parts.buttons.RoundButton;
+import com.codigoparallevar.minicards.parts.logic.Ticker;
+import com.codigoparallevar.minicards.parts.logic.Toggle;
+import com.codigoparallevar.minicards.parts.samples.ColorBox;
+import com.codigoparallevar.minicards.parts.strings.ConvertToString;
+import com.codigoparallevar.minicards.types.Part;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.programaker.api.data.ProgramakerBridgeInfo;
+import com.programaker.api.data.ProgramakerCustomBlock;
+import com.programaker.api.data.api_results.ProgramakerBridgeCustomBlockResult;
+
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Vector;
+
+public class PartsHolder {
+    private final Context context;
+
+    private final static List<Tuple2<String, PartInstantiator>> BuiltInParts =
+            new Vector<Tuple2<String, PartInstantiator>>(){{
+                add(new Tuple2<>("Round button", RoundButton.getInstantiator()));
+                add(new Tuple2<>("Ticker", Ticker.getInstantiator()));
+                add(new Tuple2<>("Red/Green box", ColorBox.getInstantiator()));
+                add(new Tuple2<>("Toggle", Toggle.getInstantiator()));
+                add(new Tuple2<>("ToString", ConvertToString.getInstantiator()));
+    }};
+
+    private final static List<PartCategory> Categories = new Vector<PartCategory>() {{
+        add(new PartCategory("Testing", BuiltInParts));
+    }};
+    private Map<String, ProgramakerBridgeInfo> bridgeInfoMap;
+
+    public PartsHolder(Context context) {
+        this.context = context;
+    }
+
+    public void openAddPartModal(final CanvasView canvasView) {
+        AlertDialog.Builder builder = new AlertDialog.Builder(context);
+        Map<String, PartCategory> categoryOptions = getPartCategories();
+        String[] categoryNames = categoryOptions.keySet().toArray(new String[0]);
+
+        builder.setTitle("Choose part category")
+                .setItems(categoryNames, new DialogInterface.OnClickListener() {
+                    public void onClick(DialogInterface dialog, int whichCategory) {
+                        if ((whichCategory >= 0) && (whichCategory < categoryNames.length)){
+                            Map<String, PartInstantiator> parts = getPartTypes(categoryOptions.get(categoryNames[whichCategory]));
+                            String[] partNames = parts.keySet().toArray(new String[0]);
+
+                            builder.setTitle("Choose part type")
+                                    .setItems(partNames, (dialog1, whichPart) -> {
+                                        if ((whichPart >= 0) && (whichPart < partNames.length)) {
+                                            String partName = partNames[whichPart];
+
+                                            Log.d("Minicards partsHolder",
+                                                    "Spawning " + partName);
+
+                                            PartInstantiator instantiator = parts.get(partName);
+                                            PartsHolder.this.runInstantiator(instantiator, canvasView);
+                                        }
+                                    });
+
+                            Dialog dialog2 = builder.create();
+                            dialog2.show();
+                        }
+                    }
+                });
+
+        Dialog dialog = builder.create();
+        dialog.show();
+    }
+
+    private void runInstantiator(PartInstantiator instantiator, CanvasView canvasView) {
+        Part part = instantiator.build(canvasView);
+        canvasView.addPart(part);
+    }
+
+    private static Map<String,PartCategory> getPartCategories() {
+        Map<String, PartCategory> partTypes = new LinkedHashMap<>(Categories.size());
+        for (int i = 0; i < Categories.size(); i++){
+            partTypes.put(Categories.get(i).getName(), Categories.get(i));
+        }
+
+        return partTypes;
+    }
+
+    private static Map<String, PartInstantiator> getPartTypes(PartCategory categoryOption) {
+        HashMap<String, PartInstantiator> partMap = new LinkedHashMap<>();
+
+        for (Tuple2<String, PartInstantiator> part : categoryOption.getParts()) {
+            partMap.put(part.item1, part.item2);
+        }
+
+        return partMap;
+    }
+
+    public void addCustomBlocks(List<ProgramakerBridgeInfo> bridgeInfo, List<ProgramakerBridgeCustomBlockResult> customBlocks) {
+        Map<String, ProgramakerBridgeInfo> bridgeInfoMap = new LinkedHashMap<>();
+        for (ProgramakerBridgeInfo info : bridgeInfo) {
+            bridgeInfoMap.put(info.getId(), info);
+        }
+
+        this.bridgeInfoMap = bridgeInfoMap;
+
+        for (ProgramakerBridgeCustomBlockResult res : customBlocks) {
+
+            List<Tuple2<String, PartInstantiator>> parts = new LinkedList<>();
+            for (ProgramakerCustomBlock block : res.getBlocks()) {
+                parts.add(new Tuple2<>(block.getMessage(), new ProgramakerCustomBlockInstantiator(block)));
+            }
+
+            if (bridgeInfoMap.containsKey(res.getBridge_id())) {
+                Categories.add(new PartCategory(bridgeInfoMap.get(res.getBridge_id()).getName(), parts));
+            }
+            else {
+                Categories.add(new PartCategory("Bridge ID="+res.getBridge_id(), parts));
+            }
+        }
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/toolbox/ProgramakerCustomBlockInstantiator.java

@@ -0,0 +1,22 @@
+package com.codigoparallevar.minicards.toolbox;
+
+import com.codigoparallevar.minicards.PartInstantiator;
+import com.codigoparallevar.minicards.parts.ProgramakerCustomBlockPart;
+import com.codigoparallevar.minicards.parts.buttons.RoundButton;
+import com.codigoparallevar.minicards.types.Part;
+import com.codigoparallevar.minicards.types.PartGrid;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.programaker.api.data.ProgramakerCustomBlock;
+
+class ProgramakerCustomBlockInstantiator extends PartInstantiator {
+    private final ProgramakerCustomBlock _block;
+
+    public ProgramakerCustomBlockInstantiator(ProgramakerCustomBlock block) {
+        this._block = block;
+    }
+
+    @Override
+    protected Part instantiate(PartGrid grid, Tuple2<Integer, Integer> center) {
+        return new ProgramakerCustomBlockPart(grid, center, this._block);
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/types/PartConnection.java

@@ -38,4 +38,17 @@ public class PartConnection {
 
         return serialized;
     }
+
+    public static JSONObject serializeToJson(final String inputConnectorId, final String inputPartId) {
+
+        JSONObject serialized = new JSONObject();
+        try {
+            serialized.put(PartConnection.INPUT_CONNECTOR_ID_KEY, inputConnectorId);
+            serialized.put(PartConnection.INPUT_PART_ID_KEY, inputPartId);
+        } catch (JSONException e) {
+            e.printStackTrace();
+        }
+
+        return serialized;
+    }
 }

app/src/main/java/com/codigoparallevar/minicards/types/PartGrid.java

@@ -3,9 +3,12 @@ package com.codigoparallevar.minicards.types;
 import com.codigoparallevar.minicards.types.connectors.input.BooleanInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.SignalInputConnector;
 import com.codigoparallevar.minicards.types.connectors.input.StringInputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.programaker.api.ProgramakerApi;
 
 public interface PartGrid {
     Selectable getPartOn(int x, int y);
+    ProgramakerApi getApi();
 
     SignalInputConnector getSignalInputConnectorOn(int x, int y);
     BooleanInputConnector getBooleanInputConnectorOn(int x, int y);

app/src/main/java/com/codigoparallevar/minicards/types/connectors/Wiring/Wire.java

@@ -53,13 +53,13 @@ public class Wire<T extends WireDataType, InputConnectorType extends InputConnec
 
         samplePath.moveTo(_xinit, _yinit);
         samplePath.cubicTo(
-                _xinit + _pathRunWay, _yinit,
-                _xend - _pathRunWay, _yend,
+                _xinit, _yinit + _pathRunWay,
+                _xend, _yend - _pathRunWay,
                 _xend, _yend);
 
         Paint pathPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        pathPaint.setColor(Color.GREEN);
-        pathPaint.setStrokeWidth(5.0f);
+        pathPaint.setColor(Color.parseColor("#44FF44"));
+        pathPaint.setStrokeWidth(10.0f);
         pathPaint.setStrokeCap(Paint.Cap.ROUND);
         pathPaint.setStyle(Paint.Style.STROKE);
 

app/src/main/java/com/codigoparallevar/minicards/types/connectors/input/AnyInputConnector.java

@@ -1,6 +1,6 @@
 package com.codigoparallevar.minicards.types.connectors.input;
 
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
 
 import com.codigoparallevar.minicards.types.Moveable;
 import com.codigoparallevar.minicards.types.Part;

app/src/main/java/com/codigoparallevar/minicards/types/connectors/output/OutputConnector.java

@@ -3,9 +3,9 @@ package com.codigoparallevar.minicards.types.connectors.output;
 import com.codigoparallevar.minicards.ScrolledCanvas;
 import com.codigoparallevar.minicards.types.Dropper;
 import com.codigoparallevar.minicards.types.Selectable;
-import com.codigoparallevar.minicards.types.Tuple2;
 import com.codigoparallevar.minicards.types.connectors.Wiring.Wire;
 import com.codigoparallevar.minicards.types.connectors.input.InputConnector;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
 import com.codigoparallevar.minicards.types.wireData.WireDataType;
 
 import java.util.List;

app/src/main/java/com/codigoparallevar/minicards/types/functional/Action.java

@@ -0,0 +1,5 @@
+package com.codigoparallevar.minicards.types.functional;
+
+public interface Action {
+    void run() throws InterruptedException;
+}

app/src/main/java/com/codigoparallevar/minicards/types/functional/Box.java

@@ -0,0 +1,13 @@
+package com.codigoparallevar.minicards.types.functional;
+
+public class Box<T> {
+    private T value;
+
+    public Box(T value) {
+        this.value = value;
+    }
+
+    public void set(T value) {
+        this.value = value;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/types/functional/Consumer.java

@@ -0,0 +1,5 @@
+package com.codigoparallevar.minicards.types.functional;
+
+public interface Consumer<T> {
+    void apply(T param) throws Exception;
+}

app/src/main/java/com/codigoparallevar/minicards/types/functional/Producer.java

@@ -0,0 +1,5 @@
+package com.codigoparallevar.minicards.types.functional;
+
+public interface Producer<T> {
+    T get();
+}

app/src/main/java/com/codigoparallevar/minicards/types/functional/Tuple2.java

@@ -1,4 +1,4 @@
-package com.codigoparallevar.minicards.types;
+package com.codigoparallevar.minicards.types.functional;
 
 public class Tuple2<T1, T2> {
     public final T1 item1;

app/src/main/java/com/codigoparallevar/minicards/types/functional/Tuple3.java

@@ -0,0 +1,19 @@
+package com.codigoparallevar.minicards.types.functional;
+
+public class Tuple3<T, T1, T2> {
+
+    public final T _x;
+    public final T1 _y;
+    public final T2 _z;
+
+    public Tuple3(T x, T1 y, T2 z) {
+        _x = x;
+        _y = y;
+        _z = z;
+    }
+
+    @Override
+    public String toString(){
+        return "(" + _x + " - " + _y + ", " + _z + ")";
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/types/functional/Tuple4.java

@@ -1,4 +1,4 @@
-package com.codigoparallevar.minicards.types;
+package com.codigoparallevar.minicards.types.functional;
 
 public class Tuple4<T, T1, T2, T3> {
 

app/src/main/java/com/codigoparallevar/minicards/ui_helpers/DoAsync.java

@@ -0,0 +1,27 @@
+package com.codigoparallevar.minicards.ui_helpers;
+
+import android.os.AsyncTask;
+import android.util.Log;
+
+import com.codigoparallevar.minicards.types.functional.Action;
+import com.codigoparallevar.minicards.types.functional.Consumer;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+
+public class DoAsync extends AsyncTask<Tuple2<Action, Consumer<Throwable>>,
+        Void, Void> {
+
+    @Override
+    protected Void doInBackground(Tuple2<Action, Consumer<Throwable>>... data) {
+        try {
+            data[0].item1.run();
+        }
+        catch (Throwable ex) {
+            try {
+                data[0].item2.apply(ex);
+            } catch (Throwable subEx) {
+                Log.e("DoAsync", "Error handling exception", subEx);
+            }
+        }
+        return null;
+    }
+}

app/src/main/java/com/codigoparallevar/minicards/ui_helpers/GetAsync.java

@@ -0,0 +1,46 @@
+package com.codigoparallevar.minicards.ui_helpers;
+
+import android.os.AsyncTask;
+import android.util.Log;
+
+import com.codigoparallevar.minicards.types.functional.Consumer;
+import com.codigoparallevar.minicards.types.functional.Producer;
+import com.codigoparallevar.minicards.types.functional.Tuple2;
+import com.codigoparallevar.minicards.types.functional.Tuple3;
+
+public class GetAsync<T> extends AsyncTask<Tuple3<Producer<T>, Consumer<T>, Consumer<Throwable>>,
+        Void,
+        Tuple2<T, Consumer<T>>> {
+
+    @Override
+    protected Tuple2<T, Consumer<T>> doInBackground(Tuple3<Producer<T>, Consumer<T>, Consumer<Throwable>>... data) {
+        try {
+            T result = data[0]._x.get();
+            return new Tuple2<>(result, data[0]._y);
+        }
+        catch (Throwable ex) {
+            try {
+                data[0]._z.apply(ex);
+            }
+            catch (Throwable subEx) {
+                Log.d("GetAsync", "Error handling exception", subEx);
+            }
+            return null;
+        }
+    }
+
+    @Override
+    protected void onPostExecute(Tuple2<T, Consumer<T>> result) {
+        if (result == null) {
+            return;
+        }
+        else {
+            try {
+                result.item2.apply(result.item1);
+            }
+            catch (Throwable ex) {
+                Log.e("GetAsync", "Error on UI thread", ex);
+            }
+        }
+    }
+}

app/src/main/java/com/programaker/api/ProgramakerApi.kt

@@ -0,0 +1,319 @@
+package com.programaker.api
+
+import android.os.Build
+import android.util.Log
+import com.google.gson.Gson
+import com.google.gson.GsonBuilder
+import com.programaker.api.data.ProgramakerBridgeInfo
+import com.programaker.api.data.ProgramakerCustomBlock
+import com.programaker.api.data.ProgramakerFunctionCallResult
+import com.programaker.api.data.api_results.*
+import com.programaker.api.exceptions.ProgramakerLoginRequiredException
+import com.programaker.api.exceptions.ProgramakerProtocolException
+import com.programaker.api.exceptions.TokenNotFoundException
+import org.json.JSONArray
+import org.json.JSONObject
+import java.io.DataOutputStream
+import java.io.FileNotFoundException
+import java.io.InputStream
+import java.io.InputStreamReader
+import java.lang.reflect.Type
+import java.net.HttpURLConnection
+import java.net.URL
+import java.net.URLConnection
+
+
+class ProgramakerApi(private val ApiRoot: String="https://programaker.com/api") {
+    private val LogTag: String = "ProgramakerApi"
+
+    private var userId: String? = null
+    private var userName: String? = null
+    var token: String? = null
+
+    // API
+    fun check(): Boolean {
+        val conn = URL(getCheckUrl()).openConnection() as HttpURLConnection
+        if (conn == null){
+            Log.e(LogTag, "URL Connection not established, set to NULL")
+            return false
+        }
+        try {
+            addAuthHeader(conn)
+        } catch(ex: TokenNotFoundException) {
+            return false
+        }
+
+        val result: ProgramakerCheckResult
+        try {
+            result = parseJson(conn.inputStream, ProgramakerCheckResult::class.java)
+        } catch(ex: JsonParseException) {
+            ex.logError(LogTag)
+            return false
+        } catch (ex: FileNotFoundException) {
+            ex.logError(LogTag)
+            return false
+        }
+
+        if (result.success) {
+            this.userId = result.user_id;
+            this.userName = result.username;
+        }
+
+        return result.success
+    }
+
+
+    fun login(user: String, password: String): String {
+        val conn = URL(getLoginUrl()).openConnection() as HttpURLConnection
+        conn.setRequestProperty("Content-Type", "application/json")
+
+        conn.requestMethod = "POST";
+        conn.doOutput = true;
+
+        val postData = JSONObject()
+        postData.put("username", user)
+        postData.put("password", password)
+
+        val wr = DataOutputStream(conn.outputStream)
+        wr.writeBytes(postData.toString());
+        wr.flush();
+        wr.close();
+
+        val result: ProgramakerLoginResult
+        result = parseJson(conn.inputStream, ProgramakerLoginResult::class.java)
+        return result.token
+    }
+
+    fun fetchCustomBlocks(): List<ProgramakerBridgeCustomBlockResult> {
+        val conn = URL(getCustomBlocksUrl()).openConnection() as HttpURLConnection
+
+        addAuthHeader(conn)
+
+        val result: ProgramakerGetCustomBlocksResult
+
+        try {
+            val builder = GsonBuilder()
+            builder.registerTypeAdapter(ProgramakerGetCustomBlocksResult::class.java, ProgramakerGetCustomBlocksResultTypeAdapter())
+
+            val gson = builder.create()
+            val reader = InputStreamReader(conn.inputStream)
+
+            result = gson.fromJson(reader, ProgramakerGetCustomBlocksResult::class.java)
+        } catch(ex: JsonParseException) {
+            ex.logError(LogTag)
+            throw ProgramakerProtocolException()
+        } catch (ex: FileNotFoundException) {
+            ex.logError(LogTag)
+            throw ProgramakerProtocolException()
+        }
+        catch (ex: Exception) {
+            Log.e(LogTag, "Unexpected exception: " + ex, ex)
+            throw ProgramakerProtocolException()
+        }
+        return result.result
+    }
+
+    fun fetchConnectedBridges(): List<ProgramakerBridgeInfo> {
+        val conn = URL(getConnectedBridgesUrl()).openConnection() as HttpURLConnection
+
+        addAuthHeader(conn)
+
+        val result: ProgramakerGetBridgeInfoResult
+
+        try {
+            val builder = GsonBuilder()
+            builder.registerTypeAdapter(ProgramakerGetBridgeInfoResult::class.java, ProgramakerGetBridgeInfoTypeAdapter())
+
+            val gson = builder.create()
+            val reader = InputStreamReader(conn.inputStream)
+
+            result = gson.fromJson(reader, ProgramakerGetBridgeInfoResult::class.java)
+        } catch(ex: JsonParseException) {
+            ex.logError(LogTag)
+            throw ProgramakerProtocolException()
+        } catch (ex: FileNotFoundException) {
+            ex.logError(LogTag)
+            throw ProgramakerProtocolException()
+        }
+        return result.result
+    }
+
+    fun callBlock(block: ProgramakerCustomBlock, arguments: List<String>): ProgramakerFunctionCallResult {
+        val conn = URL(getBlockUrl(block)).openConnection() as HttpURLConnection
+        conn.setRequestProperty("Content-Type", "application/json")
+        addAuthHeader(conn)
+
+        conn.requestMethod = "POST";
+        conn.doOutput = true;
+
+        val postData = JSONObject(hashMapOf(
+                "arguments" to JSONArray(arguments)
+        ) as Map<*, *>)
+
+        val wr = DataOutputStream(conn.outputStream)
+        wr.writeBytes(postData.toString());
+        wr.flush();
+        wr.close();
+
+        val result: ProgramakerFunctionCallResult
+        result = parseJson(conn.inputStream, ProgramakerFunctionCallResult::class.java)
+        return result
+    }
+
+    fun createBridge(name: String): String {
+        val conn = URL(getCreateBridgeUrl()).openConnection() as HttpURLConnection
+        conn.setRequestProperty("Content-Type", "application/json")
+        addAuthHeader(conn)
+
+        conn.requestMethod = "POST";
+        conn.doOutput = true;
+
+        val postData = JSONObject(hashMapOf(
+                "name" to name
+        ) as Map<*, *>)
+
+        val wr = DataOutputStream(conn.outputStream)
+        wr.writeBytes(postData.toString());
+        wr.flush();
+        wr.close();
+
+        val result: ProgramakerCreateBridgeResult
+        result = parseJson(conn.inputStream, ProgramakerCreateBridgeResult::class.java)
+        return result.getBridgeId()
+    }
+
+    fun establishConnection(bridgeId: String): Boolean {
+        // NOTE: This establishes a connection to a bridge as long as it can be done without interaction
+
+        // Prepare connection
+        val prepareConn = URL(getPrepareConnectionUrl(bridgeId)).openConnection() as HttpURLConnection
+        addAuthHeader(prepareConn)
+
+        val prepareResult: ProgramakerPrepareConnectionResult
+        prepareResult = parseJson(prepareConn.inputStream, ProgramakerPrepareConnectionResult::class.java)
+        if (prepareResult.type != "direct") {
+            throw Exception("Expected 'direct' connection type, found '${prepareResult.type}'")
+        }
+
+        // Establish connection
+        val establishConn = URL(getEstablishConnectionUrl(bridgeId)).openConnection() as HttpURLConnection
+        establishConn.setRequestProperty("Content-Type", "application/json")
+        addAuthHeader(establishConn)
+
+        establishConn.requestMethod = "POST";
+        establishConn.doOutput = true;
+
+        val establishWrite = DataOutputStream(establishConn.outputStream)
+        establishWrite.writeBytes(JSONObject().toString());
+        establishWrite.flush();
+        establishWrite.close();
+
+        val establishResult: ProgramakerEstablishDirectConnectionResult
+        establishResult = parseJson(establishConn.inputStream, ProgramakerEstablishDirectConnectionResult::class.java)
+        return establishResult.success
+    }
+
+    // Initialization
+    init {
+        // Disable connection reuse if necessary
+        // HTTP connection reuse which was buggy pre-froyo
+        if (Build.VERSION.SDK.toInt() < Build.VERSION_CODES.FROYO) {
+            System.setProperty("http.keepAlive", "false")
+        }
+    }
+
+    // Private functions
+    private fun getCheckUrl(): String {
+        return "$ApiRoot/v0/sessions/check"
+    }
+
+    private fun getLoginUrl(): String {
+        return "$ApiRoot/v0/sessions/login"
+    }
+
+    private fun getCustomBlocksUrl(): String {
+        this.withUserName()
+        return "$ApiRoot/v0/users/$userName/custom-blocks/"
+    }
+
+    private fun getConnectedBridgesUrl(): String {
+        this.withUserName()
+        return "$ApiRoot/v0/users/$userName/bridges/"
+    }
+
+    private fun getBlockUrl(block: ProgramakerCustomBlock): String {
+        this.withUserId()
+        return "$ApiRoot/v0/users/id/$userId/bridges/id/${block.bridge_id}/functions/${block.function_name}"
+    }
+
+    private fun getCreateBridgeUrl(): String {
+        this.withUserName()
+        return "$ApiRoot/v0/users/$userName/bridges"
+    }
+
+    private fun getPrepareConnectionUrl(bridgeId: String): String {
+        this.withUserName()
+        return "$ApiRoot/v0/users/$userName/services/id/$bridgeId/how-to-enable"
+    }
+
+    private fun getEstablishConnectionUrl(bridgeId: String): String {
+        this.withUserName()
+        return "$ApiRoot/v0/users/$userName/services/id/$bridgeId/register"
+    }
+
+    fun getUserId(): String? {
+        this.withUserId()
+        return userId;
+    }
+
+    private fun withUserName() {
+        if (userName == null) {
+            if (token == null) {
+                throw ProgramakerLoginRequiredException()
+            }
+
+            this.check();
+            if (userName == null) {
+                throw ProgramakerProtocolException()
+            }
+        }
+    }
+
+    private fun withUserId() {
+        if (userId == null) {
+            if (token == null) {
+                throw ProgramakerLoginRequiredException()
+            }
+
+            this.check();
+            if (userId == null) {
+                throw ProgramakerProtocolException()
+            }
+        }
+    }
+
+    private fun addAuthHeader(conn: URLConnection) {
+        if (token != null) {
+            conn.setRequestProperty("Authorization", token)
+        }
+        else {
+            throw TokenNotFoundException()
+        }
+    }
+
+    private fun <T>parseJson(content: InputStream, resultClass: Type): T {
+        val reader = InputStreamReader(content)
+        val gson = Gson()
+        return gson.fromJson(reader, resultClass)
+    }
+}
+
+private fun FileNotFoundException.logError(tag: String) {
+    Log.e(tag, "Cannot open: ${this.message}")
+}
+
+class JsonParseException(private val content: String, private val cls: Type) : Exception() {
+    fun logError(tag: String) {
+        Log.e(tag, "Cannot JSON parse: ${this.content} as ${this.cls}", this)
+    }
+}

app/src/main/java/com/programaker/api/data/ProgramakerBridgeInfo.kt

@@ -0,0 +1,9 @@
+package com.programaker.api.data
+
+class ProgramakerBridgeInfo (
+   val id: String,
+   val name: String
+   // val is_connected: boolean
+   // val icon: Map<String, Object>
+) {
+}

app/src/main/java/com/programaker/api/data/ProgramakerCustomBlock.kt

@@ -0,0 +1,62 @@
+package com.programaker.api.data
+
+import org.json.JSONArray
+import org.json.JSONObject
+
+class ProgramakerCustomBlock(
+        val block_id: String,
+        val function_name: String,
+        val message: String,
+        val arguments: List<ProgramakerCustomBlockArgument>?,
+        val block_type: String?,
+        val block_result_type: String?,
+        var bridge_id: String?,
+        val save_to: ProgramakerCustomBlockSaveTo?
+) {
+    fun serialize(): JSONObject {
+
+        val serializedArguments = JSONArray()
+        if (arguments != null) {
+            for (value in arguments) {
+                serializedArguments.put(value.serialize())
+            }
+        }
+
+        var saveToSerialized: JSONObject? = null
+        if (save_to != null) {
+            saveToSerialized = save_to.serialize()
+        }
+
+        val serialized = hashMapOf(
+                "block_id" to block_id,
+                "function_name" to function_name,
+                "message" to message,
+                "arguments" to serializedArguments,
+                "block_type" to block_type,
+                "block_result_type" to block_result_type,
+                "bridge_id" to bridge_id,
+                "save_to" to saveToSerialized
+        );
+
+        return JSONObject(serialized as Map<*, *>)
+    }
+    companion object {
+        @JvmStatic
+        fun deserialize(obj: JSONObject): ProgramakerCustomBlock {
+            var block = ProgramakerCustomBlock(
+                    obj.getString("block_id"),
+                    obj.getString("function_name"),
+                    obj.getString("message"),
+                    ProgramakerCustomBlockArgument.deserialize(obj.optJSONArray("arguments")),
+                    obj.getString("block_type"),
+                    obj.getString("block_result_type"),
+                    obj.optString("bridge_id"),
+                    ProgramakerCustomBlockSaveTo.deserialize(obj.optJSONObject("save_to"))
+            )
+
+            return block
+        }
+    }
+
+}
+

app/src/main/java/com/programaker/api/data/ProgramakerCustomBlockArgument.kt

@@ -0,0 +1,57 @@
+package com.programaker.api.data
+
+import android.util.Log
+import org.json.JSONArray
+import org.json.JSONObject
+import java.util.*
+
+class ProgramakerCustomBlockArgument(
+        val type: String?,
+        val default_value: String?,
+        // val class: String,
+        val callback: String?
+) {
+    fun serialize():  JSONObject {
+        val serialized = hashMapOf<String, String?>(
+                "type" to type,
+                "default_value" to default_value,
+                "callback" to callback
+        )
+
+        return JSONObject(serialized as Map<*, *>)
+    }
+
+    companion object {
+        @JvmStatic
+        fun deserialize(arguments: JSONArray?): List<ProgramakerCustomBlockArgument> {
+            if (arguments == null) {
+                return listOf();
+            }
+            val results: MutableList<ProgramakerCustomBlockArgument> = LinkedList()
+
+            var i = 0;
+            while (i < arguments.length()) {
+                val obj = arguments.getJSONObject(i)
+                if (obj == null) {
+                    Log.e("PMCustomBlockArgument", "Looped into a null value!?")
+                }
+                else {
+                    results.add(deserialize(obj))
+                }
+
+                i += 1;
+            }
+
+            return results
+        }
+
+        private fun deserialize(arguments: JSONObject): ProgramakerCustomBlockArgument {
+            val type: String? = arguments.optString("type")
+            val default_value: String? = arguments.optString("default_value")
+            val callback: String? = arguments.optString("callback")
+
+            return ProgramakerCustomBlockArgument(type, default_value, callback)
+        }
+    }
+
+}

app/src/main/java/com/programaker/api/data/ProgramakerCustomBlockSaveTo.kt

@@ -0,0 +1,28 @@
+package com.programaker.api.data
+
+import org.json.JSONObject
+
+class ProgramakerCustomBlockSaveTo (
+        val type: String,
+        val index: Int
+) {
+    fun serialize(): JSONObject {
+        return JSONObject(hashMapOf(
+                "type" to type,
+                "index" to index
+        ) as Map<*, *>)
+    }
+
+    companion object {
+        @JvmStatic
+        fun deserialize(save_to: JSONObject?): ProgramakerCustomBlockSaveTo? {
+            if (save_to == null) {
+                return null;
+            }
+
+            return ProgramakerCustomBlockSaveTo(save_to.getString("type"),
+                    save_to.getInt("index"))
+        }
+    }
+
+}

app/src/main/java/com/programaker/api/data/ProgramakerFunctionCallResult.kt

@@ -0,0 +1,10 @@
+package com.programaker.api.data
+
+import java.util.*
+
+class ProgramakerFunctionCallResult (
+        var success: Boolean,
+        var result: Object
+) {
+
+}

app/src/main/java/com/programaker/api/data/api_results/ProgramakerBridgeCustomBlockResult.kt

@@ -0,0 +1,6 @@
+package com.programaker.api.data.api_results
+
+import com.programaker.api.data.ProgramakerCustomBlock
+
+class ProgramakerBridgeCustomBlockResult(val bridge_id: String, val blocks: List<ProgramakerCustomBlock>) {
+}

app/src/main/java/com/programaker/api/data/api_results/ProgramakerCheckResult.kt

@@ -0,0 +1,4 @@
+package com.programaker.api.data.api_results
+
+class ProgramakerCheckResult(val success: Boolean, val user_id: String, val username: String) {
+}

app/src/main/java/com/programaker/api/data/api_results/ProgramakerCreateBridgeResult.kt

@@ -0,0 +1,17 @@
+package com.programaker.api.data.api_results
+
+class ProgramakerCreateBridgeResult (
+        val control_url: String
+) {
+    fun getBridgeId(): String {
+        val url = control_url.trim('/');
+        if (url.endsWith("communication")) {
+            val no_communication = url.substring(0, url.length - "communication".length);
+            val chunks = no_communication.trim('/').split("/");
+            return chunks[chunks.size - 1]
+        }
+        else {
+            throw IllegalArgumentException("Unknown control_url format")
+        }
+    }
+}

app/src/main/java/com/programaker/api/data/api_results/ProgramakerEstablishDirectConnectionResult.kt

@@ -0,0 +1,5 @@
+package com.programaker.api.data.api_results
+
+class ProgramakerEstablishDirectConnectionResult(val success: Boolean) {
+
+}

app/src/main/java/com/programaker/api/data/api_results/ProgramakerGetBridgeInfoResult.kt

@@ -0,0 +1,6 @@
+package com.programaker.api.data.api_results
+
+import com.programaker.api.data.ProgramakerBridgeInfo
+
+internal class ProgramakerGetBridgeInfoResult(val result: List<ProgramakerBridgeInfo>) {
+}

app/src/main/java/com/programaker/api/data/api_results/ProgramakerGetBridgeInfoTypeAdapter.kt

@@ -0,0 +1,28 @@
+package com.programaker.api.data.api_results
+
+import com.google.gson.*
+import com.programaker.api.data.ProgramakerBridgeInfo
+import com.programaker.api.data.ProgramakerCustomBlock
+import java.lang.reflect.Type
+import java.util.*
+
+internal class ProgramakerGetBridgeInfoTypeAdapter : JsonSerializer<ProgramakerGetBridgeInfoResult?>, JsonDeserializer<ProgramakerGetBridgeInfoResult> {
+    var gson = Gson()
+    override fun serialize(customBlock: ProgramakerGetBridgeInfoResult?, typeOfT: Type, context: JsonSerializationContext): JsonElement {
+        throw NotImplementedError()
+    }
+
+    @Throws(JsonParseException::class)
+    override fun deserialize(element: JsonElement, typeOfT: Type, context: JsonDeserializationContext): ProgramakerGetBridgeInfoResult {
+        val array = element.asJsonArray
+        val bridges: MutableList<ProgramakerBridgeInfo> = LinkedList()
+
+        for (value in array) {
+
+            val bridge = gson.fromJson(value, ProgramakerBridgeInfo::class.java)
+            bridges.add(bridge)
+        }
+
+        return ProgramakerGetBridgeInfoResult(bridges)
+    }
+}

app/src/main/java/com/programaker/api/data/api_results/ProgramakerGetCustomBlocksResult.kt

@@ -0,0 +1,4 @@
+package com.programaker.api.data.api_results
+
+internal class ProgramakerGetCustomBlocksResult(val result: List<ProgramakerBridgeCustomBlockResult>) {
+}

app/src/main/java/com/programaker/api/data/api_results/ProgramakerGetCustomBlocksResultTypeAdapter.kt

@@ -0,0 +1,36 @@
+package com.programaker.api.data.api_results
+
+import com.google.gson.*
+import com.programaker.api.data.ProgramakerCustomBlock
+import java.lang.reflect.Type
+import java.util.*
+
+internal class ProgramakerGetCustomBlocksResultTypeAdapter : JsonSerializer<ProgramakerGetCustomBlocksResult?>, JsonDeserializer<ProgramakerGetCustomBlocksResult> {
+    var gson = Gson()
+    override fun serialize(customBlock: ProgramakerGetCustomBlocksResult?, typeOfT: Type, context: JsonSerializationContext): JsonElement {
+        throw NotImplementedError()
+    }
+
+    @Throws(JsonParseException::class)
+    override fun deserialize(element: JsonElement, typeOfT: Type, context: JsonDeserializationContext): ProgramakerGetCustomBlocksResult {
+        val json = element.asJsonObject
+        val bridges: MutableList<ProgramakerBridgeCustomBlockResult> = LinkedList()
+
+        for ((bridgeId, value1) in json.entrySet()) {
+
+            val blocks: MutableList<ProgramakerCustomBlock> = LinkedList()
+
+            for (value in value1.asJsonArray) {
+                val block = gson.fromJson(value, ProgramakerCustomBlock::class.java)
+                block.bridge_id = bridgeId
+                blocks.add(block)
+            }
+
+            val bridge = ProgramakerBridgeCustomBlockResult(bridgeId, blocks)
+
+            bridges.add(bridge)
+        }
+
+        return ProgramakerGetCustomBlocksResult(bridges)
+    }
+}

app/src/main/java/com/programaker/api/data/api_results/ProgramakerLoginResult.kt

@@ -0,0 +1,5 @@
+package com.programaker.api.data.api_results
+
+class ProgramakerLoginResult(val user_id: String, val token: String, val success: Boolean) {
+
+}

app/src/main/java/com/programaker/api/data/api_results/ProgramakerPrepareConnectionResult.kt

@@ -0,0 +1,5 @@
+package com.programaker.api.data.api_results
+
+class ProgramakerPrepareConnectionResult(val type: String) {
+
+}

app/src/main/java/com/programaker/api/exceptions/ProgramakerConfigurationException.kt

@@ -0,0 +1,5 @@
+package com.programaker.api.exceptions
+
+open class ProgramakerConfigurationException : Exception() {
+
+}

app/src/main/java/com/programaker/api/exceptions/ProgramakerLoginRequiredException.kt

@@ -0,0 +1,5 @@
+package com.programaker.api.exceptions
+
+class ProgramakerLoginRequiredException : Throwable() {
+
+}

app/src/main/java/com/programaker/api/exceptions/ProgramakerNetworkException.kt

@@ -0,0 +1,5 @@
+package com.programaker.api.exceptions
+
+class ProgramakerNetworkException : Throwable() {
+
+}

app/src/main/java/com/programaker/api/exceptions/ProgramakerProtocolException.kt

@@ -0,0 +1,6 @@
+package com.programaker.api.exceptions
+
+import java.lang.Exception
+
+class ProgramakerProtocolException() : Exception() {
+}

app/src/main/java/com/programaker/api/exceptions/TokenNotFoundException.kt

@@ -0,0 +1,6 @@
+package com.programaker.api.exceptions
+
+import com.programaker.api.exceptions.ProgramakerConfigurationException
+
+class TokenNotFoundException : ProgramakerConfigurationException() {
+}

app/src/main/java/com/programaker/bridge/ProgramakerBridge.kt

@@ -0,0 +1,176 @@
+package com.programaker.bridge
+
+import android.util.Log
+import com.google.gson.Gson
+import okhttp3.*
+import okio.ByteString
+import org.json.JSONException
+import org.json.JSONObject
+import java.nio.charset.Charset
+import java.util.concurrent.TimeUnit
+
+
+class ProgramakerBridge(
+        private val bridge_id: String,
+        private val user_id: String,
+        private val config: ProgramakerBridgeConfiguration,
+        private val onReady: Runnable,
+        private val onComplete: Runnable
+) : WebSocketListener() {
+    private var webSocket: WebSocket? = null
+    private val utf8: Charset = Charset.forName("UTF-8")
+    private val gson = Gson()
+
+    private val PING_PERIOD_MILLIS: Long = 15000
+    private val apiRoot: String = "wss://programaker.com/api"
+    private val LogTag = "ProgramakerBridge"
+
+    // Connection establishment
+    fun run() {
+        val client: OkHttpClient = OkHttpClient.Builder()
+                .pingInterval(PING_PERIOD_MILLIS, TimeUnit.MILLISECONDS)
+                .readTimeout(0, TimeUnit.MILLISECONDS)
+                .build()
+
+        val request: Request = Request.Builder()
+                .url(getBridgeControlUrl())
+                .build()
+        client.newWebSocket(request, this)
+
+        // Trigger shutdown of the dispatcher's executor so this process can exit cleanly.
+        client.dispatcher.executorService.shutdown()
+    }
+
+    private fun getBridgeControlUrl(): String {
+        return "$apiRoot/v0/users/id/$user_id/bridges/id/$bridge_id/communication"
+    }
+
+    // Websocket management
+    override fun onOpen(webSocket: WebSocket, response: Response) {
+        this.webSocket = webSocket
+        webSocket.send(config.serialize())
+        onReady.run()
+    }
+
+    override fun onMessage(webSocket: WebSocket, bytes: ByteString) {
+        onMessage(webSocket, bytes.string(utf8))
+    }
+
+    override fun onMessage(webSocket: WebSocket, text: String) {
+        Log.d(LogTag, "Message: $text")
+        val json = gson.fromJson(text, HashMap::class.java)
+        if (json == null) {
+            this.onFailure(webSocket, JSONException("Error decoding: $text"), null)
+        }
+        else {
+            try {
+                this.onCommand(webSocket, json)
+            }
+            catch (ex: Throwable ) {
+                Log.e(LogTag, "Error on command handling: $ex", ex)
+            }
+        }
+    }
+
+    override fun onClosing(webSocket: WebSocket, code: Int, reason: String) {
+        webSocket.close(1000, null)
+        Log.i(LogTag, "Closing bridge socket {code=$code, reason=$reason}")
+        onComplete.run()
+    }
+
+    override fun onFailure(webSocket: WebSocket, t: Throwable, response: Response?) {
+        Log.e(LogTag, "Error: $t", t)
+        webSocket.close(1000, null)
+    }
+
+    // Protocol handling
+    private fun onCommand(webSocket: WebSocket, json: Map<*, *>) {
+        val type = json.get("type") as String
+        val messageId = json.get("message_id") as String
+        val value = json.get("value") as Map<*, *>
+        var userId: String? = null
+        var extraData: Map<*, *>? = null
+        if (json.containsKey("user_id")) {
+            userId = json.get("user_id") as String
+        }
+        if (json.containsKey("extra_data")) {
+            extraData = json.get("extra_data") as Map<*, *>
+        }
+
+        when (type) {
+            "GET_HOW_TO_SERVICE_REGISTRATION" -> handleGetServiceRegistrationInfo(webSocket, value, messageId, userId, extraData)
+            "REGISTRATION" -> handlePerformRegistration(webSocket, value, messageId, userId, extraData)
+            "FUNCTION_CALL" -> handleFunctionCall(webSocket, value, messageId, userId, extraData)
+            else ->
+            {
+                Log.w(LogTag, "Unknown command type: $type")
+            }
+        }
+    }
+
+    private fun handleFunctionCall(webSocket: WebSocket, value: Map<*, *>, messageId: String, userId: String?, extraData: Map<*, *>?) {
+        val functionName = value.get("function_name") as String
+        val arguments = value.get("arguments") as List<*>
+
+        try {
+            config.callFunction(functionName, arguments)
+
+            val result = JSONObject.NULL
+            webSocket.send(
+                    JSONObject(
+                            hashMapOf(
+                                    "message_id" to messageId,
+                                    "success" to true,
+                                    "result" to result
+                            ) as Map<*, *>
+                    ).toString()
+            )
+        }
+        catch (ex: Throwable) {
+            Log.w(LogTag, "Error on bridge call to $functionName", ex)
+            webSocket.send(
+                    JSONObject(
+                            hashMapOf(
+                                    "message_id" to messageId,
+                                    "success" to false
+                            ) as Map<*, *>
+                    ).toString()
+            )
+        }
+
+    }
+
+    private fun handleGetServiceRegistrationInfo(webSocket: WebSocket, value: Map<*, *>, messageId: String?, userId: String?, extraData: Map<*, *>?) {
+        // Registration is automatic
+        webSocket.send(
+                JSONObject(
+                        hashMapOf(
+                                "message_id" to messageId,
+                                "success" to true,
+                                "result" to null
+                        ) as Map<*, *>
+                ).toString()
+        )
+    }
+
+    private fun handlePerformRegistration(webSocket: WebSocket, value: Map<*, *>, messageId: String, userId: String?, extraData: Map<*, *>?) {
+        // Registration is automatic
+        if (userId == null) {
+            throw Exception("No connection ID received")
+        }
+
+        webSocket.send(
+                JSONObject(
+                        hashMapOf(
+                                "message_id" to messageId,
+                                "success" to true
+                        ) as Map<*, *>
+                ).toString()
+        )
+        this.config.configManager.bridgeConnectionId = userId
+    }
+
+    fun stop() {
+        webSocket?.close(1000, null)
+    }
+}

app/src/main/java/com/programaker/bridge/ProgramakerBridgeConfiguration.kt

@@ -0,0 +1,48 @@
+package com.programaker.bridge
+
+import com.codigoparallevar.minicards.ConfigManager
+import org.json.JSONObject
+
+class ProgramakerBridgeConfiguration(
+        val serviceName: String,
+        val configManager: ConfigManager,
+        val blocks: List<ProgramakerBridgeConfigurationBlock>
+        // val is_public: boolean, // No reason for this use case
+        // val registration: ???, // No reason for this use case
+        // val allow_multiple_connections: boolean // No reason for this use case
+        // val icon: ???, // Not supported yet // TODO: Add support
+) {
+
+    fun serialize(): String {
+        var serializedBlocks = listOf<JSONObject>()
+        if (blocks != null) {
+            serializedBlocks = blocks.map { it.serialize() }
+        }
+
+        val config = JSONObject(hashMapOf(
+                "service_name" to serviceName,
+                "is_public" to false,
+                "registration" to null,
+                "allow_multiple_connections" to null,
+                "icon" to null,
+                "blocks" to serializedBlocks
+        ) as Map<*, *>)
+
+        val wrapper = JSONObject(hashMapOf(
+                "type" to "CONFIGURATION",
+                "value" to config
+        ) as Map<*, *>)
+
+        return wrapper.toString()
+    }
+
+    fun callFunction(functionName: String, arguments: List<*>) {
+        for (block in blocks) {
+            if (block.getFunctionName() == functionName) {
+                return block.call(arguments)
+            }
+        }
+
+        throw IllegalArgumentException("Bridge function (name=$functionName) not found")
+    }
+}

app/src/main/java/com/programaker/bridge/ProgramakerBridgeConfigurationBlock.kt

@@ -0,0 +1,11 @@
+package com.programaker.bridge
+
+import org.json.JSONObject
+
+interface ProgramakerBridgeConfigurationBlock {
+    fun serialize() : JSONObject;
+    fun getFunctionName(): String;
+
+    @Throws(Exception::class)
+    fun call(arguments: List<*>)
+}

app/src/main/res/drawable/ic_cancel.xml

@@ -0,0 +1,5 @@
+<vector android:alpha="0.99" android:height="24dp"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M12,2C6.47,2 2,6.47 2,12s4.47,10 10,10 10,-4.47 10,-10S17.53,2 12,2zM17,15.59L15.59,17 12,13.41 8.41,17 7,15.59 10.59,12 7,8.41 8.41,7 12,10.59 15.59,7 17,8.41 13.41,12 17,15.59z"/>
+</vector>

app/src/main/res/drawable/ic_exit_to_app.xml

@@ -0,0 +1,5 @@
+<vector android:alpha="0.99" android:height="24dp"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF7F7F7F" android:pathData="M10.09,15.59L11.5,17l5,-5 -5,-5 -1.41,1.41L12.67,11H3v2h9.67l-2.58,2.59zM19,3H5c-1.11,0 -2,0.9 -2,2v4h2V5h14v14H5v-4H3v4c0,1.1 0.89,2 2,2h14c1.1,0 2,-0.9 2,-2V5c0,-1.1 -0.9,-2 -2,-2z"/>
+</vector>

app/src/main/res/drawable/ic_start.xml

@@ -0,0 +1,5 @@
+<vector android:alpha="0.99" android:autoMirrored="true"
+    android:height="24dp" android:viewportHeight="24.0"
+    android:viewportWidth="24.0" android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM10,16.5v-9l6,4.5 -6,4.5z"/>
+</vector>

app/src/main/res/drawable/ic_vector_icon.xml

@@ -0,0 +1,12 @@
+<vector android:alpha="0.99" android:autoMirrored="true"
+    android:height="328.6dp" android:viewportHeight="328.6"
+    android:viewportWidth="322" android:width="322dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#00000000"
+        android:pathData="M90.79,152.763 L287.19,286.563 173.29,25.493c0,0 -12.3,-23.91 -26,0.37 -13.6,24.3 -56.5,126.9 -56.5,126.9z"
+        android:strokeAlpha="1" android:strokeColor="#000000"
+        android:strokeLineCap="butt" android:strokeLineJoin="miter" android:strokeWidth="30.2362"/>
+    <path android:fillColor="#00000000"
+        android:pathData="M32.25,290.863 L132.09,230.763 74.8,191.163Z"
+        android:strokeAlpha="1" android:strokeColor="#000000"
+        android:strokeLineCap="butt" android:strokeLineJoin="miter" android:strokeWidth="30.2362"/>
+</vector>

app/src/main/res/drawable/ic_vector_stopped_icon.xml

@@ -0,0 +1,16 @@
+<vector android:alpha="0.99" android:autoMirrored="true"
+    android:height="328.6dp" android:viewportHeight="328.6"
+    android:viewportWidth="322" android:width="322dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#00000000"
+        android:pathData="M90.79,152.763 L287.19,286.563 173.29,25.493c0,0 -12.3,-23.91 -26,0.37 -13.6,24.3 -56.5,126.9 -56.5,126.9z"
+        android:strokeAlpha="1" android:strokeColor="#000000"
+        android:strokeLineCap="butt" android:strokeLineJoin="miter" android:strokeWidth="30.2362"/>
+    <path android:fillColor="#00000000"
+        android:pathData="M32.25,290.863 L132.09,230.763 74.8,191.163Z"
+        android:strokeAlpha="1" android:strokeColor="#000000"
+        android:strokeLineCap="butt" android:strokeLineJoin="miter" android:strokeWidth="30.2362"/>
+    <path android:fillColor="#000000"
+        android:pathData="M-14.73,211.691l338.429,-119.798l12.181,33.237l-338.429,119.798z"
+        android:strokeColor="#ff00ff" android:strokeLineCap="square"
+        android:strokeLineJoin="miter" android:strokeWidth="0"/>
+</vector>

app/src/main/res/layout/activity_deck_preview.xml

@@ -1,28 +1,28 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context="com.codigoparallevar.minicards.DeckPreviewActivity">
 
-    <android.support.design.widget.AppBarLayout
+    <com.google.android.material.appbar.AppBarLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:theme="@style/AppTheme.AppBarOverlay">
 
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
             android:background="?attr/colorPrimary"
             app:popupTheme="@style/AppTheme.PopupOverlay" />
 
-    </android.support.design.widget.AppBarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
 
     <include layout="@layout/content_deck_preview" />
 
-    <android.support.design.widget.FloatingActionButton
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/create_new_card_fab"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
@@ -31,4 +31,4 @@
         android:theme="@style/AppTheme"
         app:srcCompat="@drawable/ic_add_black" />
 
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout/activity_main.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout
+<androidx.coordinatorlayout.widget.CoordinatorLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
@@ -26,11 +26,11 @@
 
     <com.codigoparallevar.minicards.CanvasView
         android:id="@+id/canvasView"
-        android:layout_width="383dp"
+        android:layout_width="match_parent"
         android:layout_height="match_parent"
         tools:layout_editor_absoluteX="1dp" />
 
-    <android.support.design.widget.FloatingActionButton
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/remove_part_fab"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
@@ -63,7 +63,8 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             fab:fab_colorNormal="@color/white"
-            fab:fab_title="Show deck"
+            app:fab_icon="@drawable/ic_exit_to_app"
+            app:fab_title="@string/go_back"
             fab:fab_colorPressed="@color/white_pressed"/>
 
         <com.getbase.floatingactionbutton.FloatingActionButton
@@ -115,9 +116,10 @@
             android:id="@+id/show_deck_from_dev_mode_button"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
+            app:fab_icon="@drawable/ic_exit_to_app"
+            app:fab_title="@string/go_back"
             fab:fab_colorNormal="@color/white"
-            fab:fab_title="Show deck"
-            fab:fab_colorPressed="@color/white_pressed"/>
+            fab:fab_colorPressed="@color/white_pressed" />
 
         <com.getbase.floatingactionbutton.FloatingActionButton
             android:id="@+id/set_user_mode_button"
@@ -129,4 +131,4 @@
 
     </com.getbase.floatingactionbutton.FloatingActionsMenu>
 
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout/card_preview.xml

@@ -1,58 +1,76 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v7.widget.LinearLayoutCompat xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:card_view="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content">
 
-    <android.support.v7.widget.CardView
+    <androidx.cardview.widget.CardView
         android:id="@+id/card_preview_card"
-        android:layout_width="match_parent"
+        android:layout_width="0dp"
         android:layout_height="wrap_content"
 
-        android:layout_marginLeft="10dp"
-        android:layout_marginRight="10dp"
-        android:layout_marginTop="5dp"
-
-        android:paddingBottom="5dp"
+        android:layout_marginStart="4dp"
+        android:layout_marginLeft="4dp"
+        android:layout_marginTop="1dp"
+        android:layout_marginEnd="4dp"
+        android:layout_marginRight="4dp"
+        android:layout_marginBottom="8dp"
+        android:clickable="true"
+        android:focusable="auto"
+        android:foreground="?android:attr/selectableItemBackground"
         android:paddingLeft="15dp"
-        android:paddingRight="15dp"
         android:paddingTop="5dp"
-        card_view:cardCornerRadius="5dp"
-        card_view:cardPreventCornerOverlap="true"
+        android:paddingRight="15dp"
+        android:paddingBottom="5dp"
+        card_view:cardCornerRadius="2dp"
+        card_view:cardElevation="4dp"
         card_view:cardUseCompatPadding="true"
-        tools:layout_editor_absoluteX="8dp"
-        tools:layout_editor_absoluteY="3dp">
+        card_view:layout_constraintBottom_toBottomOf="parent"
+        card_view:layout_constraintEnd_toEndOf="parent"
+        card_view:layout_constraintStart_toStartOf="parent"
+        card_view:layout_constraintTop_toTopOf="parent">
 
-        <RelativeLayout
-            android:minHeight="100dp"
+        <androidx.constraintlayout.widget.ConstraintLayout
             android:layout_width="match_parent"
-            android:layout_height="wrap_content">
+            android:layout_height="100dp"
+            android:height="100dp">
 
             <TextView
                 android:id="@+id/card_preview_name"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:layout_alignParentBottom="true"
+                android:layout_marginStart="20dp"
                 android:layout_marginLeft="20dp"
                 android:layout_marginTop="10dp"
-                android:text="TextView"
-                android:textSize="25dp"
-                tools:layout_editor_absoluteX="8dp"
-                tools:layout_editor_absoluteY="3dp" />
+                android:layout_marginEnd="20dp"
+                android:layout_marginRight="20dp"
+                android:layout_marginBottom="30dp"
+                android:text="@string/placeholder_text"
+                android:textColor="?android:attr/colorForeground"
+                android:textSize="25sp"
+                card_view:layout_constraintBottom_toBottomOf="parent"
+                card_view:layout_constraintEnd_toEndOf="parent"
+                card_view:layout_constraintStart_toStartOf="parent"
+                card_view:layout_constraintTop_toTopOf="parent" />
 
-            <ImageView
+        </androidx.constraintlayout.widget.ConstraintLayout>
+
+    </androidx.cardview.widget.CardView>
+
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/card_preview_settings_button"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-                android:layout_alignParentEnd="true"
-                android:layout_alignParentRight="true"
-                android:layout_alignParentTop="true"
-                android:alpha="1"
+
+        android:layout_marginBottom="4dp"
         android:clickable="true"
-                android:src="@drawable/ic_settings_gray" />
+        android:focusable="true"
+        card_view:elevation="4dp"
+        card_view:hoveredFocusedTranslationZ="4dp"
+        card_view:layout_constraintBottom_toBottomOf="parent"
+        card_view:layout_constraintEnd_toEndOf="parent"
+        card_view:srcCompat="@drawable/ic_settings_black" />
 
-        </RelativeLayout>
-
-    </android.support.v7.widget.CardView>
-
-</android.support.v7.widget.LinearLayoutCompat>
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/content_deck_preview.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
@@ -8,12 +8,24 @@
     tools:context="com.codigoparallevar.minicards.DeckPreviewActivity"
     tools:showIn="@layout/activity_deck_preview">
 
+    <androidx.appcompat.widget.AppCompatButton
+        android:id="@+id/login_in_programaker_button"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="#FFFFFF"
+        android:text="@string/login_in_programaker"
+        android:textAllCaps="false"
+        app:backgroundTint="@color/colorAccent"
+        app:layout_constraintBottom_toTopOf="@id/card_deck_list"
+        app:layout_constraintTop_toTopOf="parent" />
+
     <ListView
         android:id="@+id/card_deck_list"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
+        android:layout_height="wrap_content"
         android:divider="@null"
+        android:dividerHeight="2dp"
         android:paddingTop="5dp"
-        android:dividerHeight="2dp" />
+        app:layout_constraintTop_toBottomOf="@id/login_in_programaker_button" />
 
-</android.support.constraint.ConstraintLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/login_dialog_view.xml

@@ -0,0 +1,111 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:layout_centerHorizontal="true">
+
+    <RelativeLayout
+        android:layout_marginLeft="10dp"
+        android:layout_marginTop="5dp"
+        android:layout_centerHorizontal="true"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content">
+
+        <TextView
+            android:id="@+id/login_username_label"
+            android:layout_width="81dp"
+            android:layout_height="wrap_content"
+            android:text="Username"
+            android:layout_alignBaseline="@id/login_username_text"
+            />
+
+        <EditText
+            android:id="@+id/login_username_text"
+            android:layout_width="225dp"
+            android:layout_height="wrap_content"
+            android:layout_marginRight="20dp"
+            android:layout_toRightOf="@id/login_username_label"
+            android:ems="10"
+            android:text="" />
+    </RelativeLayout>
+    <RelativeLayout
+        android:layout_marginLeft="10dp"
+        android:layout_marginTop="5dp"
+        android:layout_centerHorizontal="true"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content">
+
+        <TextView
+            android:id="@+id/login_password_label"
+            android:layout_width="81dp"
+            android:layout_height="wrap_content"
+            android:text="Password"
+            android:layout_alignBaseline="@id/login_password_text"
+            />
+
+        <EditText
+            android:id="@+id/login_password_text"
+            android:layout_width="225dp"
+            android:layout_height="wrap_content"
+            android:layout_marginRight="20dp"
+            android:layout_toRightOf="@id/login_password_label"
+            android:ems="10"
+            android:inputType="textPassword"
+            android:text="" />
+    </RelativeLayout>
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <Button
+            android:id="@+id/login_dialog_login_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:layout_marginEnd="16dp"
+            android:layout_marginRight="16dp"
+            android:layout_marginBottom="16dp"
+            android:background="@color/colorAccent"
+            android:text="@string/action_login_short"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+
+        <Button
+            android:id="@+id/login_dialog_cancel_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:layout_marginEnd="16dp"
+            android:layout_marginRight="16dp"
+            android:layout_marginBottom="16dp"
+            android:background="@android:color/transparent"
+            android:text="@android:string/cancel"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toStartOf="@+id/login_dialog_login_button"
+            app:layout_constraintTop_toTopOf="parent" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+
+        <TextView
+            android:id="@+id/login_message_label"
+            android:layout_width="81dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:layout_marginBottom="16dp"
+            android:visibility="invisible"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+</LinearLayout>

app/src/main/res/values/dimens.xml

@@ -1,3 +1,6 @@
 <resources>
     <dimen name="fab_margin">16dp</dimen>
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
 </resources>

app/src/main/res/values/strings.xml

@@ -1,4 +1,29 @@
 <resources>
     <string name="app_name">mini-cards</string>
     <string name="title_activity_deck_preview">DeckPreviewActivity</string>
+    <string name="login_in_programaker">Login in PrograMaker</string>
+    <string name="title_activity_login">Sign in</string>
+    <string name="prompt_email">Email</string>
+    <string name="prompt_password">Password</string>
+    <string name="action_sign_in">Sign in or register</string>
+    <string name="action_sign_in_short">Sign in</string>
+    <string name="welcome">"Welcome !"</string>
+    <string name="invalid_username">Not a valid username</string>
+    <string name="invalid_password">Password must be >5 characters</string>
+    <string name="login_failed">"Login failed"</string>
+    <string name="login_username_label">Username</string>
+    <string name="action_login_short">Login</string>
+    <string name="loading">Loading...</string>
+    <string name="invalid_user_pass">Invalid username/password</string>
+    <string name="placeholder_text">Placeholder text</string>
+    <string name="back_to_deck">Back to card Deck</string>
+    <string name="go_back">Go back</string>
+    <string name="bridge_service_not_started">Programaker bridge not started</string>
+    <string name="bridge_service_starting">Programaker bridge starting</string>
+    <string name="bridge_service_online">Programaker bridge online</string>
+    <string name="bridge_service_failed_restarting">Programaker bridge failed, restarting...</string>
+    <string name="bridge_service_failed_stopping">Programaker bridge stopped</string>
+    <string name="stop_bridge">Stop bridge</string>
+    <string name="start_bridge">Start bridge</string>
+    <string name="leds_notification">LED activated</string>
 </resources>

asset-src/ic_vector_icon.svg

@@ -0,0 +1,72 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   version="1.1"
+   id="svg2693"
+   width="322"
+   height="328.6"
+   viewBox="0 0 322 328.6"
+   sodipodi:docname="ic_vector_icon.svg"
+   inkscape:version="1.0 (4035a4fb49, 2020-05-01)">
+  <metadata
+     id="metadata2699">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs2697" />
+  <sodipodi:namedview
+     inkscape:document-rotation="0"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1364"
+     inkscape:window-height="746"
+     id="namedview2695"
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