Retrieve specific value from Firebase database into string variable

Question

I'm trying to retrieve a specific value from a Firebase realtime Database.

The data looks like this:

I want to get the URL value from any of them and then put it into a string variable to use later. This is so that the program does not need to be changed if the download link is changed. The code I have so far is;

DatabaseReference fdb = FirebaseDatabase.getInstance().getReference();
//Query query = fdb.child("URLDOWNLOADS").child("WSSeasons")
fdb.addListenerForSingleValueEvent(new ValueEventListener()
{
    @Override
    public void onDataChange(@NonNull DataSnapshot dataSnapshot)
    {
        for (DataSnapshot url : dataSnapshot.getChildren())
        {
            LoginInfoFirebasedb DownURL = url.getValue(LoginInfoFirebasedb.class);
            String temp = DownURL.dwldURL;
            URL1 = temp;
        }
    }

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

    }
});

Some help would be seriously appreciated. I understand this may be a simple problem but I am stumped.

Answer 1

To get each url as a String, please use the following code:

DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference ref = rootRef.child("URLDOWNLOADS");
ValueEventListener valueEventListener = new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        for(DataSnapshot ds : dataSnapshot.getChildren()) {
            String key = ds.getKey();
            String url = ds.child("URL").getValue(String.class);
            Log.d(TAG, key + " / " + url);
        }
    }

    @Override
    public void onCancelled(@NonNull DatabaseError databaseError) {
        Log.d(TAG, databaseError.getMessage()); //Don't ignore errors!
    }
};
ref.addListenerForSingleValueEvent(valueEventListener);