Android-无法获得Service内容-Service通信

public class BindService extends Service {
    private int count;
    private boolean quit;
    //定义onBinder 方法所返回的对象
    private MyBinder binder = new MyBinder();
    //实现MyBinder
    public class MyBinder extends Binder{
        public int getCount(){
            //获取count
            return count;
        }
    }
    public BindService() {
    }
    //绑定改Service时回调该方法
    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        Log.v("myService","Service is Binder");
        return binder;
    }

    //Service被创建时回调该方法
    @Override
    public void onCreate() {
        super.onCreate();
        Log.v("myService","service is created");
        //启动一个线程动态的修改 count 值；
        new Thread(){
            @Override
            public void run() {
                while (!quit){
                    try{
                        Thread.sleep(1000);
                    }catch (Exception e){

                    }
                    count++;
                }
            }
        }.start();
    }
    //Service 断开连接时回调该方法
    @Override
    public boolean onUnbind(Intent intent) {
        Log.v("myService","Service is UnBind");
        return true;
    }
    //Service 关闭之前回调该方法
    @Override
    public void onDestroy() {
        super.onDestroy();
        this.quit = true;
        Log.v("myService","Service is Destroyed");
    }
}

public class MainActivity extends AppCompatActivity {
    private  Button bind,ubind,getServiceStatus;
    //创建myBinder对象
    private BindService.MyBinder binder;
    //定义一个ServiceConnection对象
    private ServiceConnection conn = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            Log.v("myService","--Service Connected--");
            //获取Service 的onBind方法所返回的对象MyBinder 对象
            binder = (BindService.MyBinder) service;
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
            Log.v("myService","--Service Disconnected--");
        }
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //绑定 bind,ubind,getServiceStatus按钮
        bind = (Button) findViewById(R.id.bind);
        ubind = (Button) findViewById(R.id.unbind);
        getServiceStatus = (Button) findViewById(R.id.getServiceStatus);
        //启动Service 的 Intent
        final Intent intent = new Intent(this,BindService.class);
        bind.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //绑定制定的Service
                bindService(intent,conn,Service.BIND_AUTO_CREATE);
            }
        });
        ubind.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //解除绑定Service
                unbindService(conn);
            }
        });
        getServiceStatus.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //获取Service 的count
                    Toast.makeText(MainActivity.this,"Service的 count值为："+ binder.getCount(),Toast.LENGTH_SHORT).show();
            }
        });
    }
}