Firebase+Android sample app with background Service + local notifications.

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.bgfirebaseapp"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="16"
        android:targetSdkVersion="17" />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.bgfirebaseapp.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <service
            android:name=".FirebaseBackgroundService"
            android:exported="false"
            android:process=":remote" >
            <intent-filter>
                <action android:name="com.example.bgfirebaseapp.FirebaseBackgroundService" />
            </intent-filter>
        </service>

        <receiver android:name=".StartFirebaseAtBoot" >
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" >
                </action>
            </intent-filter>
        </receiver>
    </application>

</manifest>

FirebaseBackgroundService.java

package com.example.bgfirebaseapp;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;

import com.firebase.client.DataSnapshot;
import com.firebase.client.Firebase;
import com.firebase.client.ValueEventListener;

public class FirebaseBackgroundService extends Service {
	
	private Firebase f = new Firebase("https://somedemo.firebaseio-demo.com/");
	private ValueEventListener handler;

	@Override
	public IBinder onBind(Intent arg0) {
		return null;
	}
	
	@Override
	public void onCreate() {
		super.onCreate();
		
		handler = new ValueEventListener() {
			@Override
			public void onDataChange(DataSnapshot arg0) {
				postNotif(arg0.getValue().toString());
			}
			
			@Override
			public void onCancelled() {
			}
		};
		
		f.addValueEventListener(handler);
	}

	private void postNotif(String notifString) {
		NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
		int icon = R.drawable.ic_launcher;
		Notification notification = new Notification(icon, "Firebase" + Math.random(), System.currentTimeMillis());
//		notification.flags |= Notification.FLAG_AUTO_CANCEL;
		Context context = getApplicationContext();
		CharSequence contentTitle = "Background" + Math.random();
		Intent notificationIntent = new Intent(context, MainActivity.class);
		PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
		notification.setLatestEventInfo(context, contentTitle, notifString, contentIntent);
		mNotificationManager.notify(1, notification);
	}

}

MainActivity.java

package com.example.bgfirebaseapp;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		// Start the background Firebase activity
		startService(new Intent(FirebaseBackgroundService.class.getName()));
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}

Screen Shot 2013-08-06 at 5.05.57 PM.png

StartFirebaseAtBoot.java

package com.example.bgfirebaseapp;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

/**
 * Start the service when the device boots.
 * 
 * @author vikrum
 *
 */
public class StartFirebaseAtBoot extends BroadcastReceiver {

	@Override
	public void onReceive(Context context, Intent intent) {
		context.startService(new Intent(FirebaseBackgroundService.class.getName()));
	}
}

How does this affect battery?

Any complaints on battery usage?

In Android 5 intents referring to services must be explicit:
in MainActivity.java:
substitute

startService(new Intent(FirebaseBackgroundService.class.getName()));

with

startService(new Intent(this, FirebaseBackgroundService.class));

and

in StartFirebaseAtBoot.java:

substitute

context.startService(new Intent(FirebaseBackgroundService.class.getName()));

with

context.startService(new Intent(context, FirebaseBackgroundService.class));

Finally, in AndroidManifest.xml, remove the intent-filter element from the service element ("To ensure your app is secure, always use an explicit intent when starting a Service and do not declare intent filters for your services", from: http://developer.android.com/guide/components/intents-filters.html)

and it works!

Thanks for sharing :)

HELP PLZ ? :s

Replace these lines in postNoti function:

NotificationManager notificationManager = (NotificationManager)
getSystemService(NOTIFICATION_SERVICE);

      Intent intent = new Intent(this, EndActivity.class);          
    PendingIntent pIntent = PendingIntent.getActivity(this, (int) System.currentTimeMillis(), intent, 0);

    // build notification
    // the addAction re-use the same intent to keep the example short
    Notification n  = new Notification.Builder(this)
            .setContentTitle("My message")
            .setContentText("Subject")
            .setSmallIcon(R.drawable.MyApplogo)
            .setContentIntent(pIntent)
            .setAutoCancel(true)
            .setStyle(new Notification.BigTextStyle().bigText("")).build();
          //  .addAction(R.drawable.line, "", pIntent).build();
    n.flags |= Notification.FLAG_AUTO_CANCEL;
     notificationManager.notify(0, n); 

Where is Firebase.setContext() ??

I'd like to see that too @giautm

hello thanks for the code, but I have this errors and don't know why, thaks for you help.

You are using latest version of firebase on "your" project. But the version provided in this project is older. So update your code appropriately to match the new version. See them here

Easy way to drain battery, but thank u so much for share

How to app push notification from firebase to app with notif and alert dialog example : message notif whatsapp
help to me to be result example whatsapp

example code

best regards,
Mushlihun

Hi, I create my code version, and it doesn't work well.
It's very sensibility, the notification trigger it self. What's happing ?

my firebase version is also new how can i update my code appropriately to match the new version

@Max01010101010101, Why does this drain battery?
I was using Firebase Cloud Functions together with FirebaseMessagingService for notifications and I was now considering moving to this solution in order to save some Cloud Functions quota, besides, I think it would be faster.

Any thoughts?
Regards.

Nivaldo-de-Arruda found a solution to that? the notification trigger it self

I did something that worked for me, but I think there might be something better:

Date hoy = Calendar.getInstance().getTime();
String fecha = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(hoy);

Carga carga=new Carga("transportista","arribo",control ? 1 : 2,hoy,hoy);
databaseReference.child("cargas").child(fecha).setValue(carga);

fecha is the current date and the id of the object carga. In the service I do the following:

databaseReference = FirebaseDatabase.getInstance().getReference();
query = databaseReference.child("cargas").orderByChild("fechaRegistro").limitToLast(1);

With this always getting the last object entered. Working for a better solution........

I cannot push the notification if my app onDestroy.

Hi @gthb619 @vikrum,
Thank you to share your knowledge with us. I am just confuse on this point what to do and follow.
Like as you said follow this

Use this
startService(new Intent(this, FirebaseBackgroundService.class));

instead of this

startService(new Intent(FirebaseBackgroundService.class.getName()));

StartFirebaseAtBoot.java:
Use this

context.startService(new Intent(context, FirebaseBackgroundService.class));

instead of this

context.startService(new Intent(FirebaseBackgroundService.class.getName()));

So, to follow above mentioned suggestion by @gthb619 does I have to remove this

<service
            android:name=".FirebaseBackgroundService"
            android:exported="false"
            android:process=":remote" >
            <intent-filter>
                <action android:name="com.example.bgfirebaseapp.FirebaseBackgroundService" />
            </intent-filter>
        </service>

        <receiver android:name=".StartFirebaseAtBoot" >
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" >
                </action>
            </intent-filter>
        </receiver>

Someone can tell me what is the right way to do nowadays.

Thank you

One other solution is using server side Firebase Functions

Functions can be implemented to monitor database events and send cloud messages.

Then a FirebaseMessagingService service can be implemented in the Android app to listen for "com.google.firebase.MESSAGING_EVENT" sent from the funtion.

If notification field is set null the message can even awake the service even if system is in doze mode. Best strategy is then to create a notification. Keep it short and exit. Each message will start the service so no wories.

The Cloud message HTTP body sent from the server function would look like this

{
   "registration_ids":[
      "user_token_0_here", "user_token_n_here", "and so on"
   ],
   "notification":null,
   "data":{
      "par1":"AAA",
      "par2":"BBB",
      "par3":"CCC"
   },
   "android":null,
   "webpush":null,
   "priority":10
}

The AndroidManifest.xml may have the service declared like this:

<service
        android:name=".SimpleFirebaseMessagingService"
        android:exported="false">
    <intent-filter>
        <action android:name="com.google.firebase.MESSAGING_EVENT"/>
    </intent-filter>
</service>

Full details Set up a Firebase Cloud Messaging client app on Android

You are calling the service once by receiver and once by main activity is there a chance the same service is started twice?