Data not being saved to Firebase from Android App

Question

I have an existing application that I am trying to convert to use Firebase Database. Here is some code that I am using when I try to save an Object:

...
private FirebaseDatabase database;
private DatabaseReference waypointRef;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    ...

    database = FirebaseDatabase.getInstance();
    waypointRef = database.getReference(Utils.WAYPOINT_REFERENCE);

    waypointRef.addChildEventListener(new ChildEventListener() {
        @Override
        public void onChildAdded(DataSnapshot dataSnapshot, String previousChildName) {
            FBWaypoint wp = dataSnapshot.getValue(FBWaypoint.class);
            wp.setId(dataSnapshot.getKey());
            Log.e(TAG, String.format("Child Added:  %s, %s, %s, Prev: %s", wp.getName(), wp.getLatitude(), wp.getLongitude(), previousChildName));
        }

        @Override
        public void onChildChanged(DataSnapshot dataSnapshot, String previousChildName) {
            FBWaypoint wp = dataSnapshot.getValue(FBWaypoint.class);
            Log.e(TAG, String.format("Child Changed:  %s, %s, %s, Prev: %s", wp.getName(), wp.getLatitude(), wp.getLongitude(), previousChildName));
        }

        @Override
        public void onChildRemoved(DataSnapshot dataSnapshot) {
            FBWaypoint wp = dataSnapshot.getValue(FBWaypoint.class);
            wp.setId(dataSnapshot.getKey());
            Log.e(TAG, String.format("Child Removed:  %s, %s, %s, Prev: %s", wp.getName(), wp.getLatitude(), wp.getLongitude()));
        }

        @Override
        public void onChildMoved(DataSnapshot dataSnapshot, String previousChildName) {
            FBWaypoint wp = dataSnapshot.getValue(FBWaypoint.class);
            Log.e(TAG, String.format("Child Moved:  %s, %s, %s, Prev: %s", wp.getName(), wp.getLatitude(), wp.getLongitude(), previousChildName));
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
            Log.e(TAG, "Failed to add Child Listener.", databaseError.toException());
        }
    });
    ...
}

After creating an object, I save it like this:

waypointRef.push().setValue(wp);

I do see the callbacks firing in my logs at this point (along with values for the ids generated by firebase:

Child Added:  Hrbrbe, 44.969846, -89.670527, Prev: null
Child Added:  Hdbece, 44.956019, -89.666436, Prev: -KInIzqk6m96lwVWF6Pc
Child Added:  Hebdbr R, 44.970372, -89.673188, Prev: -KInJ17sfsQ4v_fUrAW3

However, I don't see anything in the firebase console for these records. Also when I restart the app, the onChildAdded callback does not get fired.

I also created another app, that just contains the code above...and that works fine. So I am not sure if something I am doing in my existing application is impacting firebase? However, I am not sure what that could be as I also took all of my dependancies and put them in the simple project as well.

Any ideas on what I can check next?

UPDATE: I added the onComplete Listener as recommended. It never gets called. If I add a FirebaseDatabase.purgeOutstandingWrites() after the setValue(), then the onComplete gets called with the following error:

DatabaseError: The write was canceled by the user.

Answer 1

Well I just figured it out. Thinking that there was a difference between my two projects was a red herring. The actual difference was between the two devices that I was deploying the two projects to. The working device was on a cellular connection. The device that wasn't working was on our corporate wifi network behind a proxy.

I do have the proxy set up correctly on the device, and I can access external sites...however, it looks like firebase does not use the proxy settings source.

Would be great if Firebase would use device proxy settings!