Odtnhj

I'm a bit puzzled by strange problem.

I'm trying to access a value on a Firebase database.

final long time = 0;
 firebaseAuth = FirebaseAuth.getInstance();
 email = FirebaseAuth.getInstance().getCurrentUser().getEmail();
 DocumentReference docRef = db.collection("location_times").document(email);
 docRef.get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() 
 @Override
 public void onComplete(@NonNull Task<DocumentSnapshot> task) 
 if (task.isSuccessful()) 
 DocumentSnapshot document = task.getResult();
 if (document.exists()) 
 Log.e(TAG, "DocumentSnapshot data: " + document.get("time"));
 time[0] = (long) document.get("time");
 Log.e(TAG, "Location frequency is " + time[0] + " seconds.");

 else 
 Log.e(TAG, "No such document");
 
 else 
 Log.e(TAG, "get failed with ", task.getException());
 
 
 );

 Log.e(TAG, "Time is: " + time[0]);

The time variable is what I want to access.

The Logcat shows the following:

Location frequency is 5 seconds.
Time is: 0

What seems to be the problem? It seems to access the database fine, but the variable isn't updated. What am I doing wrong?

Thanks in advance!

It is 0 because it is not updated yet, as firebase runs a async task to complete the listeners.

You are accessing Log.e(TAG, "Time is: " + time[0]); line of code outside onComplete listener. This line of code is executed before even the firebase has completed its fetching. You can implement a method call and access the Time from there.

final long time = 0;
firebaseAuth = FirebaseAuth.getInstance();
 email = FirebaseAuth.getInstance().getCurrentUser().getEmail();
 DocumentReference docRef = db.collection("location_times").document(email);
 docRef.get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() 
 @Override
 public void onComplete(@NonNull Task<DocumentSnapshot> task) 
 if (task.isSuccessful()) 
 DocumentSnapshot document = task.getResult();
 if (document.exists()) 
 Log.e(TAG, "DocumentSnapshot data: " + document.get("time"));
 time[0] = (long) document.get("time");
 Log.e(TAG, "Location frequency is " + time[0] + " seconds.");
 showTime(); // Added a method call
 else 
 Log.e(TAG, "No such document");
 
 else 
 Log.e(TAG, "get failed with ", task.getException());
 
 
 );

public void showTime() // perform your action after the firebase task is completed
Log.e(TAG, "Time is: " + time[0]);