Android custom push notification sample

custom_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="4dp"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:orientation="horizontal"
        android:background="#80000000"
        android:layout_height="wrap_content">

        <ImageView
            android:src="@mipmap/ic_launcher"
            android:layout_width="50dp"
            android:layout_height="match_parent"
            android:padding="10dp"
            android:layout_marginLeft="5dp"
            android:background="@null"
            android:layout_gravity="center_vertical|center_horizontal"
            android:scaleType="centerCrop"/>
        <TextView
            android:id="@+id/title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"
            android:minHeight="48dp"
            android:paddingBottom="16dp"
            android:paddingLeft="16dp"
            android:paddingRight="16dp"
            android:paddingTop="16dp"
            android:background="@android:color/transparent"
            android:textColor="@android:color/white"
            tools:text="Test"/>
    </LinearLayout>


    <ImageView
        android:id="@+id/image"
        android:layout_width="match_parent"
        android:layout_height="fill_parent"
        android:adjustViewBounds="true"
        android:contentDescription="@null"
        android:scaleType="centerCrop"
        android:src="@drawable/placeholder"/>


</LinearLayout>

GCM.java

public static void createNotification(String title, String body,String image_url, Context context, int notificationsId, String single_id) {
        Intent notificationIntent;

        long when = System.currentTimeMillis();
        int id = (int) System.currentTimeMillis();

        Bitmap bitmap = getBitmapFromURL(image_url);
        NotificationCompat.BigPictureStyle notifystyle = new NotificationCompat.BigPictureStyle();
        notifystyle.bigPicture(bitmap);
        RemoteViews contentView = new RemoteViews(context.getPackageName(), R.layout.custom_notification_layout);
        contentView.setImageViewBitmap(R.id.image, bitmap);
        contentView.setTextViewText(R.id.title, body);

        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context)
                .setSmallIcon(R.drawable.ic_launcher)
                .setStyle(notifystyle)
                .setCustomBigContentView(contentView)
                .setContentText(body);
        NotificationManager mNotificationManager = (NotificationManager) context
                .getSystemService(Context.NOTIFICATION_SERVICE);

        notificationIntent = new Intent(context, SinglePost.class);//Sritapana189
        notificationIntent.putExtra("single_id",single_id);
        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
        PendingIntent contentIntent = PendingIntent.getActivity(context, id, notificationIntent, 0); //Modified
  
        Notification notification = mBuilder.build();
        notification.contentIntent = contentIntent;
        notification.flags |= Notification.FLAG_AUTO_CANCEL;
        notification.defaults |= Notification.DEFAULT_SOUND;
        notification.defaults |= Notification.DEFAULT_VIBRATE;
        mNotificationManager.notify(notificationsId, notification);

    }

    public static Bitmap getBitmapFromURL(String strURL) {
        try {
            URL url = new URL(strURL);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setDoInput(true);
            connection.connect();
            InputStream input = connection.getInputStream();
            Bitmap myBitmap = BitmapFactory.decodeStream(input);
            return myBitmap;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }