getLastKnownLocation() returns null ; it was working a day ago

Question

getLastKnownLocation now returns null but it was totally working a day ago ! now it's constantly in null, from different phones.

what could be the problem ? did I implement it in the wrong way ? The locationFetch thread runs constantly -with a while loop implemented inside- and is responsible for calling "onLocationChanged" function with each change.

Runnable locationFetchRun = new Runnable() 
        {
            public void run() 

            {       

                tracker = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

                Criteria criteria = new Criteria();
                Location location;
                boolean enabled;

                // Initialize the location fields
                while( !isFinishing() )
                {
                    Log.i("Homepage","User id value "+user_id);

                     tracker = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
                      enabled = tracker
                      .isProviderEnabled(LocationManager.GPS_PROVIDER);

                     connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
                     activeNetworkInfo = connectivityManager.getActiveNetworkInfo();


                     //Brick point

                      if(!enabled || activeNetworkInfo.isConnected()!= true)
                      {
                          continue;
                      }

                provider = tracker.getBestProvider(criteria, true);
                location = tracker.getLastKnownLocation(provider);



                if (location != null) 
                {   

                  gps_state = 1;
                  onLocationChanged(location);
                } 

                else
                gps_state = 0;




                }

            }
      };

      //Start location fetch thread
    Thread locationFetch = new Thread(locationFetchRun);
    locationFetch.start();

Answer 1

It didn't stop working actually, it was just taking a lot of time to fetch the coordinates.. I'll search for another solution to save time and phone battery ; starting from changing the whole function to setting a decent timeout at the end of the loop.