I am trying to get locations using geoFire and place the marker on a map on that location but geoFire.getLocation() is not running. I tried putting some check Logs to see where the code is going wrong and found that after running log OKAY 1 and Log key the code is jumping directly to log OKAY 3. Here is the result of my logcat:
/supplier.watersystem.com.suppliersideapp I/OKAY: Okay 1 /supplier.watersystem.com.suppliersideapp I/KEY FOUND: station_0 /supplier.watersystem.com.suppliersideapp I/OKAY: Okay 3
11-03 19:10:25.966 32678-32678/supplier.watersystem.com.suppliersideapp E/AndroidRuntime: FATAL EXCEPTION: main Process: supplier.watersystem.com.suppliersideapp, PID: 32678
Even the id I am getting is right. I am getting NullPointerException where I am placing the marker because my location ArrayList is going empty which must have some value because if there is some error getting a location it must log it otherwise it must put the location from the database or a 0,0 LatLng.
Here's my code:
//reading station data from database and adding marker
mDatabase = FirebaseDatabase.getInstance().getReference().child("STATIONS");
ValueEventListener stationListener = new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
int i=0;
DatabaseReference geoFireRef = FirebaseDatabase.getInstance().getReference().child("STATION_LOCATIONS");
GeoFire geoFire = new GeoFire(geoFireRef);
for(DataSnapshot stationsSnapshot: dataSnapshot.getChildren()){
stations.add(stationsSnapshot.getValue(Station.class));
//Fetching Location
Log.i("OKAY ", "Okay 1");
Log.i("KEY FOUND ", stationsSnapshot.getKey());
geoFire.getLocation(stationsSnapshot.getKey(), new LocationCallback() {
@Override
public void onLocationResult(String key, GeoLocation location) {
Log.i("OKAY ", "Okay 2");
if(location!=null){
Log.i("OKAY ", "Okay 2.1 not null");
stationLocations.add(new LatLng(location.latitude,location.longitude));
}
else{
Log.i("OKAY ", "Okay 2.2 null");
stationLocations.add(new LatLng(0,0));
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
Log.i("Location Read [ERROR] ",databaseError.getMessage());
}
});
//placing marker
Log.i("OKAY ", "Okay 3");
mMap.addMarker(new MarkerOptions().position(stationLocations.get(i)).title(stations.get(i).getName()));
Log.i("OKAY ", "Okay 4");
i++;
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
Log.i("Station Read [ERROR]",databaseError.getMessage());
}
};
mDatabase.addListenerForSingleValueEvent(stationListener);
The structure of my database:
