push notifications in android code example

Example 1: android notification addaction example

public class ActionReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {

    //Toast.makeText(context,"recieved",Toast.LENGTH_SHORT).show();

    String action=intent.getStringExtra("action");
    if(action.equals("action1")){
        performAction1();
    }
    else if(action.equals("action2")){
        performAction2();

    }
    //This is used to close the notification tray
    Intent it = new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
    context.sendBroadcast(it);
}

public void performAction1(){

}

public void performAction2(){

}
}

Example 2: android foreground push notification

// When app is in foreground, notifications are not generated themselves. You need to write some additional code. When message is received onMessageReceived() method is called where you can generate the notification. Here is the code:

public class MyFirebaseMessagingService extends FirebaseMessagingService {
    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        super.onMessageReceived(remoteMessage);
        Log.d("msg", "onMessageReceived: " + remoteMessage.getData().get("message"));
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_ONE_SHOT);
        String channelId = "Default";
        NotificationCompat.Builder builder = new  NotificationCompat.Builder(this, channelId)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle(remoteMessage.getNotification().getTitle())
                .setContentText(remoteMessage.getNotification().getBody()).setAutoCancel(true).setContentIntent(pendingIntent);;
        NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel channel = new NotificationChannel(channelId, "Default channel", NotificationManager.IMPORTANCE_DEFAULT);
            manager.createNotificationChannel(channel);
        }
        manager.notify(0, builder.build());
    }
}