FirebaseRecyclerAdapter unable to populate result [duplicate]

Answer 1

To solve this, first make your adapter variable global:

private FirebaseRecyclerAdapter<UserInformation, EmployeeViewHolder> adapter;

Then you need to add the following lines of code in your onStart() and onStop() methods:

@Override
protected void onStart() {
    super.onStart();
    adapter.startListening();
}

@Override
protected void onStop() {
    super.onStop();
    if(adapter != null) {
        adapter.stopListening();
    }
}

Because the adapter uses a listener to check for database changes, in order to make it work, we need to start listening first. And when we close the application, we need to stop listening.

I have explained in one of my videos, how to achieve this, step by step.