Android 通过接口的方式去调用服务里面的方法

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);
}