如何获取保存在 USER_ID 中的数据？

Question

The data is saved correctly, as you can see in the following image:

I use this code:

btnDatos.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            String name = nameTextView.getText().toString();
            String email = emailTextView.getText().toString();
            String id = idTextView.getText().toString();
            String idJuego = idffTextView.getText().toString();


            Map hopperUdates = new HashMap();
            hopperUdates.put("name", name);
            hopperUdates.put("email", email);
            hopperUdates.put("id", id);
            hopperUdates.put("idFreeFire", idJuego);

            mDatabase.child("Usuario").child(mAuth.getCurrentUser().getUid()).updateChildren(hopperUdates);
    }
});

And to obtain the data I use the following code: mDatabase.child("Usuario").child(mAuth.getCurrentUser().getUid()).addValueEventListener(new ValueEventListener() { @Override public void onDataChange(@NonNull DataSnapshot dataSnapshot) {

            int idJuego = dataSnapshot.getValue(Integer.class);
            idffTextView.setText(idJuego);


        }

        @Override
        public void onCancelled(@NonNull DatabaseError databaseError) {

        }
    });

But it does not show the data and when I test it on the device the app is closed. What would be the error?

Answer 1

If you want all data then create model class and then stored datasnapshot into that model class like this

Model model = dataSnapshot.getValue(Model.class);

Or you want single data then just get the child like this

String idJuego = dataSnapshot.child("childname").getValue().toString;

And then set that string into textView.

Answer 2

try to convert from Integer to string...

int idJuego = dataSnapshot.getValue(Integer.class);
idffTextView.setText(String.valueOf(idJuego ));

Answer 3

Because you are saving the uid as the key of your user object and in the same time as a property within the user object, to set that id to your idffTextView , please use either the following lines of code:

String idJuego = dataSnapshot.getkey();
idffTextView.setText(idJuego);

Or:

String idJuego = dataSnapshot.child("id").getValue(String.class)
idffTextView.setText(idJuego);

Please note, that in both cases the id is of type String and not int .