public class MainActivity extends AppCompatActivity {    private MyConn conn;    private Iservice myBinder; // 我定义的中间人对象     @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);         Intent intent = new Intent(this, DemoService.class);        //连接服务        conn = new MyConn();        bindService(intent, conn, BIND_AUTO_CREATE);    }     //点击按钮调用服务里面banzheng的方法    public void click(View v) {        myBinder.callBanZheng(100000);    }     //监视服务的状态    private class MyConn implements ServiceConnection{        //当服务连接成功调用        @Override        public void onServiceConnected(ComponentName name, IBinder service) {            //获取中间人对象            myBinder = (Iservice) service;        }        //失去连接        @Override        public void onServiceDisconnected(ComponentName name) {         }    }     @Override    protected void onDestroy() {        //当Activity销毁的时候 解绑服务        unbindService(conn);        super.onDestroy();    }}

public class DemoService extends Service {    private static final String TAG = "jojp";    public DemoService() {    }    // 把我定义的中间人对象返回    @Override    public IBinder onBind(Intent intent) {        // TODO: Return the communication channel to the service.//        throw new UnsupportedOperationException("Not yet implemented");        return new MyBinder();    }     //banzheng的方法    public void banZheng(int money) {        if (money > 1000) {            Toast.makeText(getApplicationContext(), "banZheng", Toast.LENGTH_SHORT).show();        } else {            Toast.makeText(getApplicationContext(), "banZhengFail", Toast.LENGTH_SHORT).show();        }    }     //打麻将的方法    public void playMaJiang() {        Log.d(TAG, "playMaJiang: ");    }    //洗桑拿的方法    public void sangNa() {        Log.d(TAG, "sangNa: ");    }     private class MyBinder extends Binder implements Iservice{        @Override        public void callBanZheng(int money) {            //调用banzheng的方法            banZheng(money);        }        public void callPlayMaJiang() {            //调用playMaJiang的方法            playMaJiang();        }        public void callSangNa() {            //调用洗桑拿的方法            sangNa();        }    }}

public interface Iservice {    //把领导想暴露的方法都定义在接口里    public void callBanZheng(int money);}