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@vikrum
Last active April 6, 2024 12:00
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Firebase+Android sample app with background Service + local notifications.
<?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>
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);
}
}
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;
}
}
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()));
}
}
@Max01010101010101
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Easy way to drain battery, but thank u so much for share

@mushlihun
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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

example code
mainactivity
message

best regards,
Mushlihun

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

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

@eskalera
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@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.

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

@cesarade
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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........

@muslimmuda15
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I cannot push the notification if my app onDestroy.

@badarshahzad
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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

@flodmotorgrodan
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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

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

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