Handler handler是和线程MessageQueue队列关联发送和处理Message和Runnable的对象。 1.发送Runnable方法如下: post(Runnable) postAtTime(Runnable, long) postDelayed(Runnable, long) 2.发送Message方法如下: sendEmptyMessage(int) sendMessage(Message) sendMessageAtTime(Message, long) sendMessageDelayed(Mess...