Android 延迟发送消息的用法

用法一

    Runnable mRunnable = new Runnable() {
        @Override
        public void run() {
            // TODO
        }
    };

    mHandler.removeCallbacks(mRunnable);//取消待执行的消息
    mHandler.postDelayed(mRunnable, 500/* delayMillis */);

用法二

通过匿名类

        mHandler.postDelayed(new Runnable() {
            @Override
            public void run() {
                // TODO
            }
        }, 500 /* delayMillis */);

大多情况需要采用用法一

Handler类

android.os.Handler
android.os.Handler.Callback
android.os.Handler.handleMessage(Message)
android.os.Handler.dispatchMessage(Message)
android.os.Handler.Handler()
android.os.Handler.Handler(Callback)
android.os.Handler.Handler(Looper)
android.os.Handler.Handler(Looper, Callback)
android.os.Handler.getMessageName(Message)
android.os.Handler.obtainMessage()
android.os.Handler.obtainMessage(int)
android.os.Handler.obtainMessage(int, Object)
android.os.Handler.obtainMessage(int, int, int)
android.os.Handler.obtainMessage(int, int, int, Object)
android.os.Handler.post(Runnable)
android.os.Handler.postAtTime(Runnable, long)
android.os.Handler.postAtTime(Runnable, Object, long)
android.os.Handler.postDelayed(Runnable, long)
android.os.Handler.postAtFrontOfQueue(Runnable)
android.os.Handler.removeCallbacks(Runnable)
android.os.Handler.removeCallbacks(Runnable, Object)
android.os.Handler.sendMessage(Message)
android.os.Handler.sendEmptyMessage(int)
android.os.Handler.sendEmptyMessageDelayed(int, long)
android.os.Handler.sendEmptyMessageAtTime(int, long)
android.os.Handler.sendMessageDelayed(Message, long)
android.os.Handler.sendMessageAtTime(Message, long)
android.os.Handler.sendMessageAtFrontOfQueue(Message)
android.os.Handler.removeMessages(int)
android.os.Handler.removeMessages(int, Object)
android.os.Handler.removeCallbacksAndMessages(Object)
android.os.Handler.hasMessages(int)
android.os.Handler.hasMessages(int, Object)
android.os.Handler.getLooper()
android.os.Handler.dump(Printer, String)
android.os.Handler.toString()