I is the first time I am working with the location manager and I always get the same error:
java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
This happens when i call .requestLocationUpdates on a locationManager. I don't know how can I put this in the Main UI thread. Here is the code of the service where the error occurs:
public class TrackerService extends Service {
private Context mContext;
private LocListener mlocListener;
private LocationManager mlocManager;
private final IBinder myBinder = new MyLocalBinder();
public void initiateTracking() {
this.mContext = getApplicationContext();
mlocManager = (LocationManager) this.mContext.getSystemService(Context.LOCATION_SERVICE);
mlocListener = new LocListener();
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
mlocManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, mlocListener);
}
public Boolean getGPSStatus(){
return mlocManager.isProviderEnabled(mlocManager.GPS_PROVIDER);
}
public Double[] getCurrentLocation(){
Double[] lonLat = new Double[]{mlocListener.getLon(), mlocListener.getLat()};
Log.d("DEBUG", "getCurrentLocation: " + lonLat);
return lonLat;
}
public class MyLocalBinder extends Binder {
public TrackerService getService() {
return TrackerService.this;
}
}
@Override
public IBinder onBind(Intent arg0) {
return myBinder;
}
@Override
public void onCreate()
{
isRunning = true;
}
@Override
public int onStartCommand(final Intent intent, int flags, int startId) {
new Thread(new Runnable() {
@Override
public void run() {
initiateTracking();
}
}).start();
return Service.START_STICKY;
}
@Override
public void onDestroy() {
isRunning = false;
}
}
Here is how i start my service and then bind to it:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(false);
startService(new Intent(this, TrackerService.class));
bindService(new Intent(MainActivity.this, TrackerService.class), myConnection, Context.BIND_AUTO_CREATE);
}
You can add the code to run on the main UI Thread like this: