Can't get Firestore to return a field value from a collection in Android Studio-CodePudding

I'm trying to get a String value from my Firestore Database and assigning it to a TextView to test my connection to the database, but I'm not having any luck at all.

I have all dependencies in my .gradle file and both my app and firestore are linked. My Firestore usage even says I have read the database 27 times so far, but I can't seem to get the String value and use it in my TextView.

Here's what I've right now after trying numerous other ways

    FirebaseFirestore db = FirebaseFirestore.getInstance();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_menu);

        tvMenu = findViewById(R.id.tvMainMenu);
        btOpenOs = findViewById(R.id.btNewOs);

        DocumentReference docRef =
                db.collection("usuarios")
                        .document("idtest");

        docRef.get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
            @Override
            public void onComplete(@NonNull Task<DocumentSnapshot> task) {
                if (task.isSuccessful()) {
                    DocumentSnapshot document = task.getResult();
                    if (document.exists()) {
                        String dbValue = document.getString("password");
                        Log.d("TAG", "DocumentSnapshot data: "   document.getData());
                    } else {
                        Log.d("TAG", "No such document");
                    }
                } else {
                    Log.d("TAG", "get failed with ", task.getException());
                }
            }
        });

        tvMenu.setText(value);

    }

This just sets my TextView to nothing, as if the string value was null. The value I'm expecting is "teste".

CodePudding user response：

Any code that needs to have access to the data from the database, has to be inside the completion listener that gets called when that data is available.

So:

docRef.get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
    @Override
    public void onComplete(@NonNull Task<DocumentSnapshot> task) {
        if (task.isSuccessful()) {
            DocumentSnapshot document = task.getResult();
            if (document.exists()) {
                String dbValue = document.getString("password");
                tvMenu.setText(dbValue); //