Returning the firebase Father node

Question

Hello guys I’m having a doubt on how to catch the parent node that would be in the case of the image o -Kt... I made some codes but not right.

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_criar_cardapio);
    codigo = (TextView) findViewById(R.id.textView3);
    ref.child("Mesas").getParent();}

I want to assign this String to a variable to pass as parameter to another function.

Answer 1

Data recovery in Firebase is done asynchronously, this means that it is not possible to assign variables outside the scope where this being called data recovery.

codigo = (TextView) findViewById(R.id.textView3);

reference = LibraryClass.getFirebase().child("Mesas");
reference.addValueEventListener(new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {

        DataSnapshot snapshot : dataSnapshot.getChildren();

        Log.i("TAG", "key" + snapshot.getKey()); // -Kt8cQVVuvZQ1BYFp7hX

        codigo.setText(snapshot.getKey()); // -Kt8cQVVuvZQ1BYFp7hX
    }

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