How to separate FireStore logic into own classes

Question

I have this code

    public String getPoolValue() {
    final DocumentReference docRef = database.collection("pool").document("bq2a7gLnz9bpEyIyQeNz");
    docRef.get().addOnSuccessListener(new OnSuccessListener<DocumentSnapshot>() {

        @Override
        public void onSuccess(DocumentSnapshot documentSnapshot) {
            Pool pool = documentSnapshot.toObject(Pool.class);
            valueOfPool=String.valueOf(pool.getValue());
        }
    });

return valueOfPool;
}

And what happens, is it goes through this code, returns valueOfPool right away without going through the onSuccess block and then goes through a 2nd time and enters on the onSuccess block. Since I return the value of pool to an activity that activity never gets the actual value.

Answer 1

get() method is asynchronous which means the return statement will get executed before the onSuccessListener, that's why you don't get the actual value. Therefore if you are using this value in another activity, then you can use Intent and inside the onSuccessListener start the new activity:

Intent intent = new Intent(getBaseContext(), Activity.class);
intent.putExtra("value", valueOfPool);
startActivity(intent);

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