bindService没有绑定到服务

Question

所以我设置了绑定服务，但每次拨打bindService()时，它都不会调用我的服务的onBind()方法，而onServiceConnected()永远不会被调用。我没有看到任何错误，没有任何错误。

private LoggingService mService;
private boolean mBound = false;
private boolean mLogging = false;

private ServiceConnection mConnection = new ServiceConnection() {

    @Override
    public void onServiceConnected(ComponentName className, IBinder service){
        LocalBinder binder = (LocalBinder) service;
        mService = binder.getService();
        mBound = true;
    }

    @Override
    public void onServiceDisconnected(ComponentName arg0){
        mBound = false;
    }
};
...
@Override
public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);

    if(!mBound){
        Intent intent = new Intent(getActivity(), LoggingService.class);
        getActivity().bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
    }
}

我把断点都放在了这一点上。 bindService()肯定会被调用，但无论我在onServiceConnected()中等待多久，或者我的服务中的任何内容都被调用。

所以当我到达这里时，会抛出一个nullPointerException

logging.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {

            if(mLogging){
                Toast toast = Toast.makeText(getActivity(),
                        "Service stopping", Toast.LENGTH_LONG);
                toast.show();
                mService.stopLogging();
                mLogging = false;
            } else {
                Toast toast = Toast.makeText(getActivity(),
                        "Service Starting", Toast.LENGTH_LONG);
                toast.show();
                mService.startLogging("dude.jsn");
                mLogging = true;
            }
        }
    });

记录是Button。不知道我错过了什么。这是从片段中调用的，但这不重要吗？上下文仍然有效。

public class LoggingService extends Service {
    public static final int LOG_INTERVAL = 500;
    LocalBinder mBinder = new LocalBinder();
    LoggingThread thread;

    public class LocalBinder extends Binder {
        LoggingService getService() {
            return LoggingService.this;
        }
    }

...

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

指出我错过的任何帮助都会很棒。