java.lang.ClassCastException lors de l'ajout autorisation dans la classe de service à Fetch Lieu

Question

Je suis en train de construire simple fournisseur de localisation avec un service qui devrait mettre à jour l'emplacement dans le temps, donc je l'ai fait ce service:

public class MyService extends Service 
{ 
    private static final String TAG = "BOOMBOOMTESTGPS"; 
    private LocationManager mLocationManager = null; 
    private static final int LOCATION_INTERVAL = 1000; 
    private static final float LOCATION_DISTANCE = 10f; 

    private final IBinder mBinder = new LocalBinder(); 
    private Intent intent; 

    Location mLastLocation; 

    public class LocalBinder extends Binder { 
     public MyService getServerInstance() { 
      return MyService.this; 
     } 
    } 

    public Location getLocation(){ 
     return mLastLocation; 
    } 


    private class LocationListener implements android.location.LocationListener 
    { 

     public LocationListener(String provider) 
     { 
      Log.e(TAG, "LocationListener " + provider); 
      mLastLocation = new Location(provider); 
     } 

     @Override 
     public void onLocationChanged(Location location) 
     { 
      Log.e(TAG, "onLocationChanged: " + location); 
      mLastLocation.set(location); 
      Log.d("HELLO",String.valueOf(mLastLocation.getLatitude())); 
     } 


     @Override 
     public void onProviderDisabled(String provider) 
     { 
      Log.e(TAG, "onProviderDisabled: " + provider); 
     } 

     @Override 
     public void onProviderEnabled(String provider) 
     { 
      Log.e(TAG, "onProviderEnabled: " + provider); 
     } 

     @Override 
     public void onStatusChanged(String provider, int status, Bundle extras) 
     { 
      Log.e(TAG, "onStatusChanged: " + provider); 
     } 
    } 

    LocationListener[] mLocationListeners = new LocationListener[] { 
      new LocationListener(LocationManager.GPS_PROVIDER), 
      new LocationListener(LocationManager.NETWORK_PROVIDER) 
    }; 


    @Override 
    public int onStartCommand(Intent intent, int flags, int startId) 
    { 
     Log.e(TAG, "onStartCommand"); 
     super.onStartCommand(intent, flags, startId); 
     return START_STICKY; 
    } 


    @Override 
    public IBinder onBind(Intent intent) { 
     return mBinder; 
    } 

    @Override 
    public void onCreate() 
    { 
     Log.e(TAG, "onCreate"); 
     initializeLocationManager(); 
     try { 
      mLocationManager.requestLocationUpdates(
        LocationManager.NETWORK_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE, 
        mLocationListeners[1]); 
     } catch (java.lang.SecurityException ex) { 
      Log.i(TAG, "fail to request location update, ignore", ex); 
     } catch (IllegalArgumentException ex) { 
      Log.d(TAG, "network provider does not exist, " + ex.getMessage()); 
     } 
     try { 
      mLocationManager.requestLocationUpdates(
        LocationManager.GPS_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE, 
        mLocationListeners[0]); 
     } catch (java.lang.SecurityException ex) { 
      Log.i(TAG, "fail to request location update, ignore", ex); 
     } catch (IllegalArgumentException ex) { 
      Log.d(TAG, "gps provider does not exist " + ex.getMessage()); 
     } 
    } 

    @Override 
    public void onDestroy() 
    { 
     Log.e(TAG, "onDestroy"); 
     super.onDestroy(); 
     if (mLocationManager != null) { 
      for (int i = 0; i < mLocationListeners.length; i++) { 
       try { 
        mLocationManager.removeUpdates(mLocationListeners[i]); 
       } catch (Exception ex) { 
        Log.i(TAG, "fail to remove location listners, ignore", ex); 
       } 
      } 
     } 
    } 

    private void initializeLocationManager() { 
     Log.e(TAG, "initializeLocationManager"); 
     mLocationManager = (LocationManager) getSystemService(LOCATION_SERVICE); 
     if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 
      if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 

       ActivityCompat.requestPermissions((Activity) getApplicationContext(), new String[]{android.Manifest.permission.ACCESS_COARSE_LOCATION}, 
         30); 
      } 
     } 
     if (mLocationManager == null) { 
      mLocationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE); 
     } 
    } 
} 

la dernière partie où je vérifie l'autorisation pour l'emplacement grossier échoue parce que la coulée du getAplicationContext() ici:

mLocationManager = (LocationManager) getSystemService(LOCATION_SERVICE); 
     if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 
      if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 

       ActivityCompat.requestPermissions((Activity) getApplicationContext(), new String[]{android.Manifest.permission.ACCESS_COARSE_LOCATION}, 
         30); 
      } 
     } 
     if (mLocationManager == null) { 
      mLocationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE); 
     } 

quand je commence le service sur mon activité principale je reçois cette erreur:

06-10 15:33:37.682 28790-28790/com.example.afcosta.inesctec.pt.gpstracker E/AndroidRuntime: FATAL EXCEPTION: main 
                          Process: com.example.afcosta.inesctec.pt.gpstracker, PID: 28790 
                          java.lang.RuntimeException: Unable to create service com.example.afcosta.inesctec.pt.gpstracker.MyService: java.lang.ClassCastException: android.app.Application cannot be cast to android.app.Activity 
                           at android.app.ActivityThread.handleCreateService(ActivityThread.java:3201) 
                           at android.app.ActivityThread.-wrap5(ActivityThread.java) 
                           at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1567) 
                           at android.os.Handler.dispatchMessage(Handler.java:102) 
                           at android.os.Looper.loop(Looper.java:154) 
                           at android.app.ActivityThread.main(ActivityThread.java:6119) 
                           at java.lang.reflect.Method.invoke(Native Method) 
                           at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 
                           at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) 
                          Caused by: java.lang.ClassCastException: android.app.Application cannot be cast to android.app.Activity 
                           at com.example.afcosta.inesctec.pt.gpstracker.MyService.initializeLocationManager(MyService.java:152) 
                           at com.example.afcosta.inesctec.pt.gpstracker.MyService.onCreate(MyService.java:109) 
                           at android.app.ActivityThread.handleCreateService(ActivityThread.java:3191) 
                           at android.app.ActivityThread.-wrap5(ActivityThread.java)  
                           at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1567)  
                           at android.os.Handler.dispatchMessage(Handler.java:102)  
                           at android.os.Looper.loop(Looper.java:154)  
                           at android.app.ActivityThread.main(ActivityThread.java:6119)  
                           at java.lang.reflect.Method.invoke(Native Method)  
                           at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)  
                           at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) 

Un conseil?

Answer 1

il suffit de supprimer le contrôle et l'initialiser normalement

private void initializeLocationManager() { 
     Log.e(TAG, "initializeLocationManager"); 
     if (mLocationManager == null) { 
      mLocationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE); 
     } 
    }