OnServiceConnected不被呼叫

Question

我已经提到以下问题，但找不到答案：

• Can't get service object (onServiceConnected never called)，
• onServiceConnected not getting called , getting a null pointer exception，和
• onServiceConnected never called after bindService method

这是我的代码：

@Override
    public void onStart() {
        super.onStart();
        Context context = getApplicationContext();
        Intent intent = new Intent(context, PodService.class);
        context.bindService(intent, mPodServiceConn, Context.BIND_AUTO_CREATE);

    }




    private ServiceConnection mPodServiceConn = new ServiceConnection() {
                @Override
                public void onServiceConnected(ComponentName className, IBinder service) {
                    Log.e(TAG, "Pod: Service Connected");
                  mPodService = IPodService.Stub.asInterface(service); //here i am getting NullPointerException
                }
        }

我的服务类什么也不包含，只有这么多，我向它展示了

public class PodService extends Service {
@Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        Log.d("bound", "bound");
        return null;
    }

 static class PodSeviceStub extends IPodService.Stub {

//here i implemented unimplemented methods

    }
}

但是在lolcat中，我只从onBind()函数获得“onBind”消息，而不是打印"Pod: Service Connected"，这意味着服务已经成功启动。在lolcat中，我得到了NullPointerException，并且在清单文件中也提到了。

Answer 1

我重写了服务类，以便onBind()将IBinder作为follwos返回。

public class PodService extends Service {
@Override
    public IBinder onBind(Intent intent) {

        Log.d("bound", "bound");
        return mBinder; // returns IBinder object
    }

    private final IBinder mBinder = new PodSeviceStub(this);

 static class PodSeviceStub extends IPodService.Stub {

         WeakReference<PodService> mService;

        public PodSeviceStub(PodService service) {// added a constructor for Stub here
            mService = new WeakReference<PodService>(service);
        }
//here i implemented unimplemented methods

    }
}

现在起作用了。