Implement dummy widget

app/src/main/AndroidManifest.xml

@@ -62,6 +62,16 @@
         <activity android:name=".IntroActivity"
                   android:label=""
                   android:theme="@style/Theme.AppCompat.Light.NoActionBar" />
+
+        <receiver android:name="SmallWidgetProvider">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+            </intent-filter>
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/small_widget_info" />
+        </receiver>
+
     </application>
 
 </manifest>

app/src/main/java/org/isoron/uhabits/SmallWidgetProvider.java

@@ -0,0 +1,66 @@
+/* Copyright (C) 2016 Alinson Santos Xavier
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied  warranty of MERCHANTABILITY or
+ * FITNESS  FOR  A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You  should  have  received  a  copy  of the GNU General Public License
+ * along  with  this  program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.isoron.uhabits;
+
+import android.appwidget.AppWidgetManager;
+import android.appwidget.AppWidgetProvider;
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.util.Log;
+import android.widget.RemoteViews;
+
+import org.isoron.uhabits.views.SmallWidgetView;
+
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+
+public class SmallWidgetProvider extends AppWidgetProvider
+{
+    @Override
+    public void onUpdate(Context context, AppWidgetManager manager, int[] appWidgetIds)
+    {
+        for(int id : appWidgetIds)
+            updateWidget(context, manager, id);
+    }
+
+    private void updateWidget(Context context, AppWidgetManager manager, int widgetId)
+    {
+        RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.small_widget);
+
+        SmallWidgetView widgetView = new SmallWidgetView(context);
+        widgetView.setDrawingCacheEnabled(true);
+        widgetView.measure(200, 200);
+        widgetView.layout(0, 0, 200, 200);
+        widgetView.buildDrawingCache(true);
+
+        Bitmap drawingCache = widgetView.getDrawingCache();
+
+        try
+        {
+            drawingCache.compress(Bitmap.CompressFormat.PNG, 100,
+                    new FileOutputStream(context.getFilesDir() + "/widget.png"));
+        }
+        catch (FileNotFoundException e)
+        {
+            e.printStackTrace();
+        }
+
+        Log.d("SmallWidgetProvider", drawingCache.toString());
+        remoteViews.setImageViewBitmap(R.id.imageView, drawingCache);
+        manager.updateAppWidget(widgetId, remoteViews);
+    }
+}

app/src/main/java/org/isoron/uhabits/views/SmallWidgetView.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2016 Alinson Santos Xavier
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied  warranty of MERCHANTABILITY or
+ * FITNESS  FOR  A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You  should  have  received  a  copy  of the GNU General Public License
+ * along  with  this  program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ */
+
+package org.isoron.uhabits.views;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.util.AttributeSet;
+import android.view.View;
+
+import org.isoron.helpers.ColorHelper;
+
+public class SmallWidgetView extends View
+{
+    private Paint pCircle;
+
+    public SmallWidgetView(Context context)
+    {
+        super(context);
+        init(context);
+    }
+
+    public SmallWidgetView(Context context, AttributeSet attrs)
+    {
+        super(context, attrs);
+        init(context);
+    }
+
+    private void init(Context context)
+    {
+        pCircle = new Paint();
+        pCircle.setColor(ColorHelper.palette[7]);
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas)
+    {
+        super.onDraw(canvas);
+        canvas.drawOval(0, 0, getMeasuredWidth(), getMeasuredHeight(), pCircle);
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
+    {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        setMeasuredDimension(widthMeasureSpec, heightMeasureSpec);
+    }
+
+    @Override
+    protected void onSizeChanged(int w, int h, int oldw, int oldh)
+    {
+        super.onSizeChanged(w, h, oldw, oldh);
+    }
+}

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

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:gravity="center"
+    android:orientation="vertical">
+
+    <ImageView
+        android:id="@+id/imageView"
+        android:layout_width="55dp"
+        android:layout_height="55dp"
+        />
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:shadowColor="#000000"
+        android:shadowDx="1"
+        android:shadowDy="1"
+        android:shadowRadius="3"
+        android:padding="6dp"
+        android:text="Widget"/>
+
+</LinearLayout>

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

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<org.isoron.uhabits.views.SmallWidgetView xmlns:android="http://schemas.android.com/apk/res/android"
+              android:orientation="vertical"
+              android:layout_width="120dp"
+              android:layout_height="120dp">
+
+</org.isoron.uhabits.views.SmallWidgetView>

app/src/main/res/xml/small_widget_info.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+                    android:minHeight="40dp"
+                    android:minWidth="40dp"
+                    android:initialLayout="@layout/small_widget"
+                    android:previewImage="@mipmap/ic_small_widget_preview"
+                    android:resizeMode="none"
+                    android:updatePeriodMillis="3600000"
+                    android:widgetCategory="home_screen">
+
+
+</appwidget-provider>