java - 错误: incompatible types: Message cannot be converted to int?

Question

我一直在尝试为 Android 应用制作启动画面，并且我使用过 this教程。一切都应该没问题，除了 Android Studio 给我一条错误消息说

Message can't be converted to int.

我正在为 msg.what 分配一个 int 值，但这应该有效，所以我不太确定为什么它会给我这个错误。

我的代码如下:

    private static final long SplashTime = 3000;
    private static final int StopSplash = 0;

    private ImageView splash;

    @SuppressLint("HandlerLeak")
    private Handler splashHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            if (msg.what == StopSplash) {
                splash.setVisibility(View.GONE);
                //break;
            }
            super.handleMessage(msg);
        }
    };

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.splashsheet);
        splash = (ImageView) findViewById(R.id.splashscreen);
        Message msg = Message.obtain();
        msg.what = StopSplash;

        splashHandler.sendEmptyMessageDelayed(msg, SplashTime);
    }
}

Answer 1

对于sendEmptyMessageDelayed，您应该仅传递what代码作为第一个参数:

splashHandler.sendEmptyMessageDelayed(StopSplash, SplashTime);

另一方面，您可以使用sendMessageDelayed:

splashHandler.sendMessageDelayed(msg, SplashTime);