NETWORK_PROVIDER 的 LocationListener 已启用，但从未调用 onLocationChanged

我正在开发一个应用程序，可以在服务中全天 6 和 6 分钟内获取手机的位置，它工作正常，但有时该方法OnLocationChanged网络提供商侦听器的停止被调用，我不知道为什么。

由于某种原因，它停止被调用，但当我手动启用或禁用提供程序时，提供程序已启用且列表器正在工作，onProviderEnabled and onProviderDisabled叫做。

它只是发生在NETWORK_PROVIDER, the GPS_PROVIDER效果很好。

听众：

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:

仍然连续 4 天获得“Sem sinal”。

Galaxy Y 和 LG Optimus l5 已出现此问题

我做了另一个测试，看看其他应用程序是否获得了 NET 位置，我发现它们通过了同样的问题，它们无法仅通过 GetLastknowLocation 获得 NET 位置；为了测试我使用的 Galaxy S3 是否存在此问题，我禁用了 GPS 提供商。 （在 Cerberus 中测试）。

我找不到任何解释为什么 NETWORKSLOCATIONS 侦听器停止提供位置，但这可能是因为它不应该连续工作 2 或 3 天。

我已经对其他应用程序进行了一些测试，看看这个问题是否只发生在我的应用程序中，并且我发现它们正在通过相同的问题，例如在 Cerberus 中：

我在手机（Galaxy S3）中禁用了 GPS 提供商，并出现“Sem sinal”问题，请看一下：

My report:

And Cerberus(print taken in 14/05/2013) report:

但是当我打开谷歌地图时，它似乎工作正常，我尝试移动到远处的地方，看看它是否会显示GetLastknowLocation，但是没有，谷歌地图当时把我放在了正确的位置，所以我意识到谷歌地图正在使用motionevent在地图上移动我；

并打印 Google Maps 的 Log 以获取 NetWorkProvider：

正常情况：

典型案例：

我也遇到过类似的问题网络提供商唯一的解决办法是强制设备重启。 尽管谷歌地图始终显示正确的位置，因为它还使用除网络位置提供商之外的其他传感器信息。

但这里是好消息，不久前 Google 通过其推出了 Fused Location Provider apiGoogle Play 服务框架这比 GPS/网络定位提供商超级容易使用。

兼容 API 级别 8，现在当我遇到网络提供商的奇怪问题时，同时 Fused Location 为我提供准确的位置（无需重新启动设备）。

我已承诺一项工作FusedLocation 测试项目在这里，你可以克隆并测试自己..

下面是代码片段：-

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;
    }
}