How to get “Text” in TextView from RealTime Firebase

How to get text in TextView from RealTime Database using Java?

Answer

To get the value of “text” field that exists under your “app_billing” node, please use the following lines of code:

DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference textRef = rootRef.child("app_billing").child("text");
textRef.get().addOnCompleteListener(new OnCompleteListener<DataSnapshot>() {
    @Override
    public void onComplete(@NonNull Task<DataSnapshot> task) {
        if (task.isSuccessful()) {
            DataSnapshot snapshot = task.getResult();
            String text = snapshot.getValue(String.class);
            textView.setText(text);
        } else {
            Log.d("TAG", task.getException().getMessage()); //Don't ignore potential errors!
        }
    }
});