I want to save the data I retrieved from the query to global class variables e.g .RoomType but when it exists query.addValueEventListener's scope the data is never saved. When I perform Log.w("Value", " value is "+ RoomType ); within its scope it outputs the data retrieved. How would I save those data globally?
Here is my code:
public class DatabaseManager {
public static String RoomName, RoomType, BuildingName;
static int RoomLevel;
public Double RoomLat, RoomLang ;
//connecting to Firebase database by creating database reference
private static FirebaseDatabase mDatabase;
public static FirebaseDatabase getDatabase() {
if (mDatabase == null) {
//Retrieving an instance of the database
mDatabase = FirebaseDatabase.getInstance();
//Enabling database for offline use for events where there is no internet connection
mDatabase.setPersistenceEnabled(true);
}
return mDatabase;
}
public void getresults(DatabaseReference myref, String data){
Query query= myref.child("rooms").orderByChild("RoomName").equalTo(data);
query.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
if (dataSnapshot.exists()) {
for (DataSnapshot Node : dataSnapshot.getChildren()) {
RoomType = Node.child("RoomType").getValue().toString();
BuildingName = Node.child("BuildingName").getValue().toString();
RoomLevel = Node.child("RoomLevel").getValue(Integer.class);
RoomLat = Node.child("RoomLat").getValue(Double.class);
RoomLang = Node.child("RoomLang").getValue(Double.class);
}
}
Log.w("Value", " value is "+ RoomType );
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
Log.w("Value at end ", " value is "+ RoomType );
}
}
