嗨，我開發了一個應用程序，以查找最佳位置并將其短信發送至某個號碼。它在網絡位置上可以正常工作，但是當我想在GPS或Criteria類中定位時，它會強制關閉！您好幫助我tnx。package ir.M410.toolkit;import android.app.Service;import android.content.Intent;import android.location.Criteria;import android.location.Location;import android.location.LocationListener;import android.location.LocationManager;import android.os.Bundle;import android.os.IBinder;import android.telephony.SmsManager;import android.util.Log;public class LocationFinder extends Service implements LocationListener{double lat ,lon ;@Overridepublic IBinder onBind(Intent arg0) {    return null;       }@Overridepublic int onStartCommand(Intent intent, int flags, int startId) {    // We want this service to continue running until it is explicitly    // stopped, so return sticky.    LocationManager mlocationManager = (LocationManager)        getSystemService(LOCATION_SERVICE);    Criteria criteria = new Criteria();    criteria.setAccuracy(Criteria.ACCURACY_FINE);    criteria.setPowerRequirement(Criteria.POWER_MEDIUM);    String locationprovider = mlocationManager.getBestProvider(criteria, true);    Location mlocation = mlocationManager.getLastKnownLocation(locationprovider);      lat = mlocation.getLatitude ();      lon = mlocation.getLongitude ();      Log.i("Geo_Location", "Latitude: " + lat + ", Longitude: " + lon);      SmsManager sms = SmsManager.getDefault();        sms.sendTextMessage("+11231233213", null,"https://maps.google.com/maps?q="+lat+","+lon, null, null);        //  SmsManager sms = SmsManager.getDefault();    //sms.sendTextMessage(MainActivity.senderNum, null,"  "+"lat:"+lat+"  "+"lon:"+lon, null, null); //stopSelf();          return START_NOT_STICKY;}@Overridepublic void onLocationChanged(Location location) {    // TODO Auto-generated method stub     lat= location.getLatitude();    lon =location.getLongitude();    Log.i("Geo_Location", "Latitude: " + lat + ", Longitude: " + lon);  //  stopSelf();}