問題描述

我正在開發一個應用程序，該應用程序可以在服務中的 6 分鐘和 6 分鐘內全天獲取手機的位置，它工作正常，但有時網絡提供商偵聽器的方法 OnLocationChanged 停止存在打電話，我不知道為什么.

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.

它由于某種原因停止被調用，但是提供程序已啟用并且列表器正在工作，當我手動啟用或禁用提供程序時，會調用 onProviderEnabled 和 onProviderDisabled.

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.

這只是發生在 NETWORK_PROVIDER 上，GPS_PROVIDER 運行良好.

It just happens with NETWORK_PROVIDER, the GPS_PROVIDER works well.

聽眾:

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;
        }
    };

代碼:

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");
            }
        }

三星 Galaxy S3 中的報告:

Report in a Samsung Galaxy S3:

仍然連續 4 天收到Sem sinal".

Still getting "Sem sinal" for 4 days in a row.

Galaxy Y 和 LG Optimus l5 已經出現此問題

This issue have already happened with Galaxy Y and LG Optimus l5

我進行了另一項測試，看看其他應用程序是否獲得了 NET 位置，我發現它們通過了同樣的問題，它們無法僅通過 GetLastknowLocation 獲得 NET 位置；測試我使用 Galaxy S3 解決了這個問題，并禁用了 GPS Provider.(在 Cerberus 中測試).

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).

我找不到任何解釋為什么 NETWORKSLOCATIONS 聽眾停止給出位置，但這可能是因為它不應該連續工作 2 或 3 天.

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.

我已經對其他應用程序進行了一些測試，看看這個問題是否只是在我的應用程序中發生，我發現它們正在通過同樣的問題，例如在 Cerberus 中:

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 :

我在手機 (Galaxy S3) 中禁用 GPS 提供程序，出現Sem sinal"問題，看看:

I disable the GPS Provider in a cellphone (Galaxy S3) with the "Sem sinal" problem, take a look:

我的報告:

和 Cerberus(打印于 2013 年 5 月 14 日)報告:

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

但是當我打開谷歌地圖時，它似乎工作正常，我試圖移動到一個較遠的地方，看看它是否會顯示 GetLastknowLocation ，但是沒有，谷歌地圖把我放在正確的地方，所以我意識到谷歌地圖正在使用motionevent在地圖中移動我；

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;

同時打印 Google Maps 的 Log 以獲取 NetWorkProvider:

And also print the Log of Google Maps to get NetWorkProvider:

正常情況:

句號:

推薦答案

我在 Network provider 遇到過類似的問題，唯一的解決方案是強制設備重啟.盡管谷歌地圖總是顯示正確的位置，因為它使用了除了網絡位置提供者之外的其他傳感器信息.

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.

但這是好消息，不是很久以前 Google 通過其 Google Play 服務框架，比 GPS/網絡位置提供商超級好用.

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.

兼容 API 級別 8，現在當我遇到網絡提供商這個奇怪的問題時，同時融合位置給了我準確的位置(無需重啟設備).

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).

我已經提交了一個工作FusedLocation 測試項目在這里，你可以自己克隆和測試..

I have commited one working FusedLocation Test Project here, you can clone and test yourself..

下面是代碼片段:-

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;
    }
}

這篇關于NETWORK_PROVIDER 的 LocationListener 已啟用，但永遠不會調用 onLocationChanged的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！