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android – Send notification automatically from Firebase

Posted by: admin June 16, 2020 Leave a comment

Questions:

I am developing an android app using Firebase.
Can Firebase send push notifications automatically when a record inserted to a table or I must implement my own server.

How to&Answers:

Since the 9th of march 2017 Firebase introduced “Firebase Functions”.It helps to trigger some events on specific dataset changes.These events could be then available in the Firebase Notifications Console to trigger the push Notification.

Take a look at https://firebase.googleblog.com/2017/03/introducing-cloud-functions-for-firebase.html

Answer:

Firebase provides push notification but not on database table changes.
What you can do, you can create listeners in a background service and fire a notification from those listeners.

For instance, for listening to changes in ‘User’ node.

 FirebaseDatabase myFirebaseRef = FirebaseDatabase.getInstance();
 DatabaseReference myRef = myFirebaseRef.getReference("User");

 ValueEventListener valueEventListener = new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {

                 //put your notification code here
            }

        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
            Log.i("FirebaseError", databaseError.getMessage());
        }
    };

 myRef.addValueEventListener(valueEventListener);