Question

这是我第一次使用服务，确实看起来很复杂。

所以我试图在用服务关闭我的应用程序之后获取用户的位置。

这是我的服务类。

public class LocTrack extends Service {


GPSTracker gp;
@Override
public void onCreate() 
{    gp = new GPSTracker(getApplicationContext());
    onLocationChanged(gp);
    super.onCreate();        
}
@Override
public void onDestroy() {
    // TODO Auto-generated method stub
    super.onDestroy();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    // TODO Auto-generated method stub

    return Service.START_STICKY;
}


@Override
public IBinder onBind(Intent arg0) {
    // TODO Auto-generated method stub
    return null;
}

public void onLocationChanged(GPSTracker track) {


    // Getting latitude
    double latitude = track.getLatitude();

    // Getting longitude
    double longitude = track.getLongitude();

     Geocoder geocoder = new Geocoder(LocTrack.this, Locale.getDefault());

    try
     {
         List<Address> addresses = geocoder.getFromLocation(latitude, longitude,1);
         Log.e("Addresses","-->"+addresses);

     }
     catch (IOException e)
     {
         e.printStackTrace();

     }

}
}

请告诉我，我做错了什么。如果我在活动类中使用代码，那么我可以在logcat中获取地址，但在使用服务时却无法获取。

这就是我从活动中调用服务的方式

    Intent intent = new Intent(MainActivity.this, LocTrack.class);
             startService(intent);

Answer 1

最好的方法是使用CWAC的位置服务位置轮询器服务已经为我们使用它只需要给出唤醒它的时间间隔

这样做就像你需要jar文件一样，你可以从https://www.dropbox.com/sh/pgxk2v9l5vl0h2j/3svyZnuwOK/CWAC-LocationPoller.jar

获取它

从您的活动中启动LocationPoller并将警报重复设置为您想要的时间

AlarmManager alarmMgr = (AlarmManager) getSystemService(ALARM_SERVICE);
Intent i = new Intent(this, LocationPoller.class);

Bundle bundle = new Bundle();
LocationPollerParameter parameter = new LocationPollerParameter(bundle);
parameter.setIntentToBroadcastOnCompletion(new Intent(this,
        LocationReceiver.class));
// try GPS and fall back to NETWORK_PROVIDER
parameter.setProviders(new String[] { LocationManager.GPS_PROVIDER,
        LocationManager.NETWORK_PROVIDER });
parameter.setTimeout(120000);
i.putExtras(bundle);

PendingIntent pi = PendingIntent.getBroadcast(this, 0, i, 0);
alarmMgr.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
        SystemClock.elapsedRealtime(), 300000, pi);

创建一个接收器类位置接收器，从那里获取lat n lon

public class LocationReceiver extends BroadcastReceiver {
  @Override
  public void onReceive(Context context, Intent intent) {


    try {      
      Bundle b=intent.getExtras();

      LocationPollerResult locationResult = new LocationPollerResult(b);

      Location loc=locationResult.getLocation();
      String msg;

      if (loc==null) {
        loc=locationResult.getLastKnownLocation();

        if (loc==null) {
          msg=locationResult.getError();
        }
        else {
          msg="TIMEOUT, lastKnown="+loc.toString();
        }
      }
      else {
        msg=loc.toString();



        Log.i("Location Latitude", String.valueOf(loc.getLatitude()));
        Log.i("Location Longitude", String.valueOf(loc.getLongitude()));
        Log.i("Location Accuracy", String.valueOf(loc.getAccuracy()));




      }

      Log.i(getClass().getSimpleName(), "received location: " + msg);   



    }
    catch (Exception e) {
      Log.e(getClass().getName(), e.getMessage());
    }
  }

并将其添加到您的清单

   <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />

   <receiver android:name="com.commonsware.cwac.locpoll.LocationPoller" />

   <service android:name="com.commonsware.cwac.locpoll.LocationPollerService" />

以及您将获取所有内容的接收者声明

   <receiver android:name="com.RareMediaCompany.Helios.LocationReceiver" />

使用服务获取GPS位置，android？

1 个答案: