Set base for adding login.

app/build.gradle

@@ -1,4 +1,6 @@
 apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android-extensions'
+apply plugin: 'kotlin-android'
 
 android {
     compileSdkVersion 25
@@ -21,6 +23,8 @@ android {
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'com.android.support:support-annotations:28.0.0'
+    implementation 'android.arch.lifecycle:extensions:1.1.1'
     androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
@@ -28,7 +32,12 @@ dependencies {
     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'
+    implementation 'com.getbase:floatingactionbutton:1.10.1'
-    compile 'com.larswerkman:HoloColorPicker:1.5'
+    implementation 'com.larswerkman:HoloColorPicker:1.5'
     implementation 'com.android.support:cardview-v7:25.4.0'
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation 'com.google.code.gson:gson:2.8.6'
+}
+repositories {
+    mavenCentral()
 }

app/src/main/AndroidManifest.xml

@@ -1,13 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.codigoparallevar.minicards">
-
     <!-- OpenGL ES 2.0 -->
-
     <uses-feature
         android:glEsVersion="0x00020000"
         android:required="true" />
 
+    <uses-permission android:name="android.permission.INTERNET" />
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
@@ -15,9 +15,13 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
+        <activity
+            android:name=".ui.login.LoginActivity"
+            android:label="@string/title_activity_login"></activity>
         <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 +30,12 @@
             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/DeckPreviewActivity.java

@@ -2,6 +2,7 @@ package com.codigoparallevar.minicards;
 
 import android.app.Dialog;
 import android.content.DialogInterface;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.support.design.widget.FloatingActionButton;
 import android.support.v7.app.AlertDialog;
@@ -9,6 +10,7 @@ import android.support.v7.widget.Toolbar;
 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.Toast;
@@ -18,11 +20,18 @@ import java.io.IOException;
 import java.util.List;
 import java.util.Vector;
 
+import com.programaker.api.ProgramakerApi;
+
 public class DeckPreviewActivity extends ReloadableAppCompatActivity {
 
     public static final String INTENT = "com.codigoparallevar.minicards.DECK";
     private ListView listView;
     private CardPreviewArrayAdapter cardArrayAdapter;
+    private ProgramakerApi ProgramakerApi = new ProgramakerApi();
+
+    protected void openLoginForm(View view) {
+
+    }
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -39,7 +48,26 @@ public class DeckPreviewActivity extends ReloadableAppCompatActivity {
             }
         });
 
+        Button loginButton = (Button) findViewById(R.id.login_in_programaker_button);
+        loginButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                DeckPreviewActivity.this.openLoginForm(v);
+            }
+       });
+
         listView = (ListView) findViewById(R.id.card_deck_list);
+
+
+        new AsyncTask<ProgramakerApi, Void, Boolean>() {
+            protected Boolean doInBackground(ProgramakerApi... api) {
+                return api[0].Check();
+            }
+
+            protected void onPostExecute(Boolean result) {
+                Log.d("MiniCards",  "check result: " + result);
+            }
+        }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, this.ProgramakerApi);
     }
 
     @Override

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

@@ -0,0 +1,72 @@
+package com.programaker.api
+
+import android.os.Build
+import android.util.JsonReader
+import android.util.Log
+import com.google.gson.Gson
+import com.google.gson.GsonBuilder
+import java.io.*
+import java.lang.reflect.Type
+import java.net.HttpURLConnection
+import java.net.URL
+import java.net.URLConnection
+import javax.net.ssl.HttpsURLConnection
+
+
+class ProgramakerApi(private val ApiRoot: String="https://programaker.com/api") {
+    private val LogTag: String = "ProgramakerApi"
+    private val TokenEntry: String = "ProgramakerAuthToken"
+
+    // 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
+        }
+        return result.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/ping"
+    }
+
+    private fun addAuthHeader(conn: URLConnection) {
+        // TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    private fun <T>parseJson(content: InputStream, resultClass: Type): T {
+        val reader = InputStreamReader(content)
+        val gson = Gson()
+        return gson.fromJson(reader, resultClass)
+    }
+}
+
+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}")
+    }
+}

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

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

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

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

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

@@ -0,0 +1,4 @@
+package com.programaker.api
+
+class TokenNotFoundException : ProgramakerConfigurationException() {
+}

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

@@ -11,23 +11,23 @@
         android:layout_height="wrap_content"
 
         android:layout_marginLeft="10dp"
-        android:layout_marginRight="10dp"
         android:layout_marginTop="5dp"
+        android:layout_marginRight="10dp"
 
-        android:paddingBottom="5dp"
         android:paddingLeft="15dp"
-        android:paddingRight="15dp"
         android:paddingTop="5dp"
+        android:paddingRight="15dp"
+        android:paddingBottom="5dp"
         card_view:cardCornerRadius="5dp"
-        card_view:cardPreventCornerOverlap="true"
+        card_view:cardElevation="10dp"
         card_view:cardUseCompatPadding="true"
         tools:layout_editor_absoluteX="8dp"
         tools:layout_editor_absoluteY="3dp">
 
         <RelativeLayout
-            android:minHeight="100dp"
             android:layout_width="match_parent"
-            android:layout_height="wrap_content">
+            android:layout_height="wrap_content"
+            android:minHeight="100dp">
 
             <TextView
                 android:id="@+id/card_preview_name"
@@ -44,9 +44,9 @@
                 android:id="@+id/card_preview_settings_button"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:layout_alignParentTop="true"
                 android:layout_alignParentEnd="true"
                 android:layout_alignParentRight="true"
-                android:layout_alignParentTop="true"
                 android:alpha="1"
                 android:clickable="true"
                 android:src="@drawable/ic_settings_gray" />

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

@@ -8,12 +8,24 @@
     tools:context="com.codigoparallevar.minicards.DeckPreviewActivity"
     tools:showIn="@layout/activity_deck_preview">
 
+    <android.support.v7.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>

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 +1,14 @@
 <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>
 </resources>

build.gradle

@@ -1,13 +1,15 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
+    ext.kotlin_version = '1.3.61'
 
     repositories {
         google()
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.0'
+        classpath 'com.android.tools.build:gradle:3.6.1'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
 
         // NOTE: Do not place your application dependencies here; they belong