LocationListener of NETWORK_PROVIDER is enabled but , onLocationChanged is never called
I am developing an application that gets position of the cell phone all day long in 6 and 6 minutes in a service, it works fine but sometimes the method OnLocationChanged of the Network provider listener stop to being called, and I don't know why.
It for some reason stop being called, but the Provider is enable and the Lister is working, when I Enable or disable the Provider manually, onProviderEnabled and onProviderDisabled is called.
It just happens with NETWORK_PROVIDER, the GPS_PROVIDER works well.
Listener:
LocationListener locationListenerGPS = new LocationListener() {
// @Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO locationListenerGPS onStatusChanged
Log.d(TAG, "Provedor trocado");
}
// @Override
public void onProviderEnabled(String provider) {
Log.w(TAG, "PROVEDOR " + provider + " HABILITADO!");
}
// @Override
public void onProviderDisabled(String provider) {
Log.w(TAG, "PROVEDOR " + provider + " DESABILITADO!");
}
// @Override
public void onLocationChanged(Location location) {
longitudeGPS = location.getLongitude();
latitudeGPS = location.getLatitude();
Log.d(TAG,"LocationChangedGPS LAT: "+latitudeGPS+" longi: "+longitudeGPS);
gpsComSinal = true;
}
};
LocationListener locationListenerNET = new LocationListener() {
// @Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO locationListenerNET onStatusChanged
Log.d("Contele", "Provedor foi mudado");
}
// @Override
public void onProviderEnabled(String provider) {
Log.i(TAG, "PROVEDOR " + provider + " HABILITADO!");
}
// @Override
public void onProviderDisabled(String provider) {
Log.i(TAG, "PROVEDOR " + provider + " DESABILITADO!");
}
@Override
public void onLocationChanged(Location location) {
longitudeNET = location.getLongitude();
latitudeNET = location.getLatitude();
Log.d(TAG,"LocationChangedNET LAT: "+latitudeNET+" longi: "+longitudeNET);
netComSinal = true;
}
};
Code:
public void initProviders() {
localizacao = (LocationManager) getApplicationContext().getSystemService(LOCATION_SERVICE);
localizacao.removeUpdates(locationListenerNET);
localizacao.removeUpdates(locationListenerGPS);
localizacao.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,
locationListenerGPS);
localizacao.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0,
0, locationListenerNET);
Log.d(TAG,"EsperaGPS");
Handler esperaGPS = new Handler() {
public void handleMessage(Message msg) {
requestGPS();
}
};
Message msgEsperaGPS = Message.obtain();
msgEsperaGPS.what = 0;
esperaGPS.sendMessageDelayed(msgEsperaGPS, 35000);
}
public void requestGPS() {
if (gpsComSinal) {
Log.d(TAG,"PEGO SINAL DE GPS");
rastreio = "GPS";
longitude = longitudeGPS;
latitude = latitudeGPS;
Log.d(TAG, "Utilizando provedor GPS.");
localizacao.removeUpdates(locationListenerGPS);
localizacao.removeUpdates(locationListenerNET);
} else {
Log.d(TAG,"Sem GPS... pegar NEt");
// Setando os valores para usar network
localizacao.removeUpdates(locationListenerGPS);
localizacao.removeUpdates(locationListenerNET);
localizacao
.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,
0, 0, locationListenerNET);
Log.d(TAG,"EsperaNET");
requestNET();
}
}
public void requestNET() {
if (netComSinal) {
Log.d(TAG,"PEGO SINAL DE NET");
rastreio = "NET";
longitude = longitudeNET;
latitude = latitudeNET;
Log.d(TAG, "Utilizando provedor NET.");
localizacao.removeUpdates(locationListenerNET);
} else {
localizacao.removeUpdates(locationListenerGPS);
localizacao.removeUpdates(locationListenerNET);
Log.d(TAG,"Sem sinal");
}
}
Report in a Samsung Galaxy S3:
Still getting "Sem sinal" for 4 days in a row.
This issue have already happened with Galaxy Y and LG Optimus l5
I have made another test to see if other aplications got the NET positions, and I discovered that they are passing for the same problem, they can't get the NET position just the GetLastknowLocation; to test that I used a Galaxy S3 with this problem, and I disabled the GPS Provider. (Tested in Cerberus).
I couldn't find any explanation for why NETWORKSLOCATIONS listener stop giving positions, but it might be because it shouldn't work for 2 or 3 days without stop.
I have done some tests with other aplications to see if this issue is just happening with my aplication, and I discovered that they are passing for same problem, like in Cerberus for example :
I disable the GPS Provider in a cellphone (Galaxy S3) with the "Sem sinal" problem, take a look:
My report:
And Cerberus(print taken in 14/05/2013) report:
But When I opened the Google Maps it seems to work OK, I tried to move to a distance place to see if it going to show the GetLastknowLocation , but no, google maps put me in the right place in the moment, so I realized that Google Maps was using motionevent to move me in the map;
And also print the Log of Google Maps to get NetWorkProvider:
Normal case:
Sem sinal case:
Answer
i have experienced similar issues with Network provider and only solution was force device restart. Though google map was showing always correct location, because it uses other sensors information also apart from Network location provider.
But here is good news, not Long time back Google introduced Fused Location Provider api's via its Google Play Service Framework which is super easy to use than GPS / Network Location providers.
Compatible upto API Level 8, now when i get this weird issue of Network provider, same time Fused Location gives me accurate location(without device restart).
I have commited one working FusedLocation Test Project here, you can clone and test yourself..
Below is snippet of code:-
package com.example.fusedLoctionTest.service;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.support.v4.content.LocalBroadcastManager;
import android.util.Log;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesClient;
import com.google.android.gms.location.LocationClient;
import com.google.android.gms.location.LocationRequest;
public class FusedLocationService extends Service implements GooglePlayServicesClient.ConnectionCallbacks,
GooglePlayServicesClient.OnConnectionFailedListener, com.google.android.gms.location.LocationListener{
private static final LocationRequest REQUEST = LocationRequest.create()
.setInterval(0)
.setFastestInterval(0)
.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
public static final String LOCATION_RECEIVED = "fused.location.received";
private Long now;
private LocationClient mLocationClient;
private final Object locking = new Object();
private Runnable onFusedLocationProviderTimeout;
private Handler handler = new Handler();
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
super.onStartCommand(intent, flags, startId);
now = Long.valueOf(System.currentTimeMillis());
mLocationClient = new LocationClient(this, this, this);
mLocationClient.connect();
return START_STICKY;
}
@Override
public void onConnected(Bundle bundle) {
Log.d("FusedLocationService", "Fused Location Provider got connected successfully");
mLocationClient.requestLocationUpdates(REQUEST,this);
onFusedLocationProviderTimeout = new Runnable() {
public void run() {
Log.d("FusedLocationService", "location Timeout");
Location lastbestStaleLocation=getLastBestStaleLocation();
sendLocationUsingBroadCast(lastbestStaleLocation);
if(lastbestStaleLocation!=null)
Log.d("FusedLocationService", "Last best location returned ["+lastbestStaleLocation.getLatitude()+","+lastbestStaleLocation.getLongitude()+"] in "+(Long.valueOf(System.currentTimeMillis())-now)+" ms");
if(mLocationClient.isConnected())
mLocationClient.disconnect();
}
};
handler.postDelayed(onFusedLocationProviderTimeout, 20000);//20 sec
}
private void sendLocationUsingBroadCast(Location location) {
Intent locationBroadcast = new Intent(FusedLocationService.LOCATION_RECEIVED);
locationBroadcast.putExtra("LOCATION", location);
locationBroadcast.putExtra("TIME", Long.valueOf(System.currentTimeMillis()-now) +" ms");
LocalBroadcastManager.getInstance(this).sendBroadcast(locationBroadcast);
stopSelf();
}
@Override
public void onDisconnected() {
Log.d("FusedLocationService","Fused Location Provider got disconnected successfully");
stopSelf();
}
@Override
public void onLocationChanged(Location location) {
synchronized (locking){
Log.d("FusedLocationService", "Location received successfully ["+location.getLatitude()+","+location.getLongitude()+"] in "+(Long.valueOf(System.currentTimeMillis()-now))+" ms");
handler.removeCallbacks(onFusedLocationProviderTimeout);
if(mLocationClient.isConnected())
mLocationClient.removeLocationUpdates(this);
sendLocationUsingBroadCast(location);
if(mLocationClient.isConnected())
mLocationClient.disconnect();
}
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Log.d("FusedLocationService", "Error connecting to Fused Location Provider");
}
public Location getLastBestStaleLocation() {
Location bestResult = null;
LocationManager locMgr = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Location lastFusedLocation=mLocationClient.getLastLocation();
Location gpsLocation = locMgr.getLastKnownLocation(LocationManager.GPS_PROVIDER);
Location networkLocation = locMgr.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (gpsLocation != null && networkLocation != null) {
if (gpsLocation.getTime() > networkLocation.getTime())
bestResult = gpsLocation;
} else if (gpsLocation != null) {
bestResult = gpsLocation;
} else if (networkLocation != null) {
bestResult = networkLocation;
}
//take Fused Location in to consideration while checking for last stale location
if (bestResult != null && lastFusedLocation != null) {
if (bestResult.getTime() < lastFusedLocation.getTime())
bestResult = lastFusedLocation;
}
return bestResult;
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
}