How to get FCM notification data when app is not in task or killed?

Question

I need to get data from FCM notifications in android and store them locally, but the problem is I am only able to do that when app is in foreground and then onMessageRecieved is called or when user taps on notification. I want to get notification's data when user gets notification and app is not running, not even in background or foreground. Please suggest something. Thank you in advance.

Answer 1

You can use BroadcastReceiver

public class FirebaseDataReceiver extends BroadcastReceiver {

    private final String TAG = "FirebaseDataReceiver";

    public void onReceive(Context context, Intent intent) {
        Bundle bundle = intent.getExtras();
        if (bundle != null) {
            Set<String> keys = intent.getExtras().keySet();

            for (String key : bundle.keySet()) {
                Object value = bundle.get(key);
                // You can use key and values here
            }
        }
    }
}

Manifest.xml

<application>

    ............

    <receiver
        android:name="PackageName.FirebaseDataReceiver"
        android:exported="true"
        android:permission="com.google.android.c2dm.permission.SEND">
        <intent-filter>
            <action android:name="com.google.android.c2dm.intent.RECEIVE" />
        </intent-filter>
    </receiver>

    ............

</application>