在android中调用bindService

Question

我正在从MyFragment.class中的onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState)调用bind()，在onResume()中，我试图访问mSerive，但它显示的是空指针异常，onServiceConnected(ComponentName name, IBinder service)在onResume()之后调用。为什么我打电话给onServiceConnected时不调用bind()，有人能给出建议吗？

private final ServiceConnection mServiceConnection = new ServiceConnection() {

    @Override
    public void onServiceDisconnected(ComponentName name) {
        try {
            mService.unregisterCallback(mCallback.this);
            mService = null;
        } catch (RemoteException e) {
        }

    }

    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
        try {
            mService = IService.Stub.asInterface(service);
            mService.registerCallback(mCallback.this);
        } catch (RemoteException e) {
        }
    }
};

public void bind() {
    if (!mServiceConnected) {
        mServiceConnected = true;
        Intent connectionIntent = new Intent(IService.class.getName());
        mActivity.bindService(connectionIntent, mServiceConnection,
                Context.BIND_AUTO_CREATE);

    } 
}

Answer 1

试着用这个

 // inapp
    Intent serviceIntent = new Intent(
            "com.android.vending.billing.InAppBillingService.BIND");
    serviceIntent.setPackage("com.android.vending");

    bindService = bindService(serviceIntent, mServiceConn,
            Context.BIND_AUTO_CREATE);