add some icons

app/src/main/AndroidManifest.xml

@@ -40,7 +40,8 @@
             android:screenOrientation="portrait"/>
 
         <receiver
-            android:name=".MyWidgetProvider">
+            android:name=".MyWidgetProvider"
+            android:icon="@mipmap/flashlight_small">
             <intent-filter>
                 <action android:name="android.appwidget.action.APPWIDGET_UPDATE"/>
             </intent-filter>

app/src/main/java/com/simplemobiletools/flashlight/MainActivity.java

@@ -1,6 +1,7 @@
 package com.simplemobiletools.flashlight;
 
 import android.content.Intent;
+import android.graphics.PorterDuff;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 import android.view.Menu;
@@ -8,7 +9,6 @@ import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.WindowManager;
 import android.widget.ImageView;
-import android.widget.Toast;
 
 import butterknife.BindView;
 import butterknife.ButterKnife;
@@ -82,20 +82,21 @@ public class MainActivity extends AppCompatActivity implements MyCamera {
 
     @Override
     public void enableFlashlight() {
-        toggleBtn.setImageResource(R.mipmap.flashlight_big_on);
+        final int appColor = getResources().getColor(R.color.colorPrimary);
+        toggleBtn.setImageResource(R.mipmap.flashlight_big);
+        toggleBtn.getDrawable().mutate().setColorFilter(appColor, PorterDuff.Mode.SRC_IN);
         getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
     }
 
     @Override
     public void disableFlashlight() {
-        toggleBtn.setImageResource(R.mipmap.flashlight_big_off);
+        toggleBtn.setImageResource(R.mipmap.flashlight_big);
         getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
     }
 
     @Override
     public void cameraUnavailable() {
-        final String errorMsg = getResources().getString(R.string.camera_error);
-        Toast.makeText(this, errorMsg, Toast.LENGTH_SHORT).show();
+        Utils.showToast(this, R.string.camera_error);
         disableFlashlight();
     }
 }

app/src/main/java/com/simplemobiletools/flashlight/MyWidgetProvider.java

@@ -6,14 +6,18 @@ import android.appwidget.AppWidgetProvider;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
 import android.widget.RemoteViews;
 
 public class MyWidgetProvider extends AppWidgetProvider implements MyCamera {
     private static MyCameraImpl cameraImpl;
     private static RemoteViews remoteViews;
+    private static Context cxt;
     private static int[] widgetIds;
     private static AppWidgetManager widgetManager;
     private static final String TOGGLE = "toggle";
+    private static Bitmap coloredBmp;
 
     @Override
     public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
@@ -22,17 +26,22 @@ public class MyWidgetProvider extends AppWidgetProvider implements MyCamera {
     }
 
     private void initVariables(Context context) {
-        final ComponentName component = new ComponentName(context, MyWidgetProvider.class);
+        cxt = context;
+        final ComponentName component = new ComponentName(cxt, MyWidgetProvider.class);
         widgetManager = AppWidgetManager.getInstance(context);
         widgetIds = widgetManager.getAppWidgetIds(component);
 
-        final Intent intent = new Intent(context, MyWidgetProvider.class);
+        final Intent intent = new Intent(cxt, MyWidgetProvider.class);
         intent.setAction(TOGGLE);
 
-        final PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
-        remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget);
+        final PendingIntent pendingIntent = PendingIntent.getBroadcast(cxt, 0, intent, 0);
+        remoteViews = new RemoteViews(cxt.getPackageName(), R.layout.widget);
         remoteViews.setOnClickPendingIntent(R.id.toggle_btn, pendingIntent);
         cameraImpl = new MyCameraImpl(this);
+
+        final Resources res = cxt.getResources();
+        final int appColor = res.getColor(R.color.colorPrimary);
+        coloredBmp = Utils.getColoredIcon(cxt.getResources(), appColor, R.mipmap.flashlight_small);
     }
 
     @Override
@@ -50,7 +59,7 @@ public class MyWidgetProvider extends AppWidgetProvider implements MyCamera {
 
     @Override
     public void enableFlashlight() {
-        remoteViews.setImageViewResource(R.id.toggle_btn, R.mipmap.flashlight_big_on);
+        remoteViews.setImageViewBitmap(R.id.toggle_btn, coloredBmp);
         for (int widgetId : widgetIds) {
             widgetManager.updateAppWidget(widgetId, remoteViews);
         }
@@ -58,7 +67,7 @@ public class MyWidgetProvider extends AppWidgetProvider implements MyCamera {
 
     @Override
     public void disableFlashlight() {
-        remoteViews.setImageViewResource(R.id.toggle_btn, R.mipmap.flashlight_big_off);
+        remoteViews.setImageViewResource(R.id.toggle_btn, R.mipmap.flashlight_small);
         for (int widgetId : widgetIds) {
             widgetManager.updateAppWidget(widgetId, remoteViews);
         }

app/src/main/java/com/simplemobiletools/flashlight/Utils.java

@@ -0,0 +1,30 @@
+package com.simplemobiletools.flashlight;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.Canvas;
+import android.graphics.ColorFilter;
+import android.graphics.Paint;
+import android.graphics.PorterDuff;
+import android.graphics.PorterDuffColorFilter;
+import android.widget.Toast;
+
+public class Utils {
+    public static Bitmap getColoredIcon(Resources res, int newTextColor, int id) {
+        final BitmapFactory.Options options = new BitmapFactory.Options();
+        options.inMutable = true;
+        final Bitmap bmp = BitmapFactory.decodeResource(res, id, options);
+        final Paint paint = new Paint();
+        final ColorFilter filter = new PorterDuffColorFilter(newTextColor, PorterDuff.Mode.SRC_IN);
+        paint.setColorFilter(filter);
+        final Canvas canvas = new Canvas(bmp);
+        canvas.drawBitmap(bmp, 0, 0, paint);
+        return bmp;
+    }
+
+    public static void showToast(Context context, int resId) {
+        Toast.makeText(context, context.getResources().getString(resId), Toast.LENGTH_SHORT).show();
+    }
+}

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

@@ -3,10 +3,13 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:paddingBottom="@dimen/activity_margin">
+    android:background="@android:color/black"
+    android:gravity="center"
+    android:padding="@dimen/activity_margin">
 
     <ImageView
         android:id="@+id/toggle_btn"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"/>
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:src="@mipmap/flashlight_big"/>
 </RelativeLayout>

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

@@ -4,4 +4,5 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:src="@mipmap/flashlight_big_off"/>
+    android:padding="10dp"
+    android:src="@mipmap/flashlight_small"/>