Android 延迟发送消息的用法

• 用法一
• 用法二
• Handler类

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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 */);

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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

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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()