protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.handlertest);

        button = (Button) findViewById(R.id.button);
        myHandler = new MyHandler();
        // 當(dāng)創(chuàng)建一個(gè)新的Handler實(shí)例時(shí), 它會(huì)綁定到當(dāng)前線程和消息的隊(duì)列中,開(kāi)始分發(fā)數(shù)據(jù)
        // Handler有兩個(gè)作用, (1) : 定時(shí)執(zhí)行Message和Runnalbe 對(duì)象
        // (2): 讓一個(gè)動(dòng)作,在不同的線程中執(zhí)行.

        // 它安排消息,用以下方法
        // post(Runnable)
        // postAtTime(Runnable,long)
        // postDelayed(Runnable,long)
        // sendEmptyMessage(int)
        // sendMessage(Message);
        // sendMessageAtTime(Message,long)
        // sendMessageDelayed(Message,long)

        // 以上方法以 post開(kāi)頭的允許你處理Runnable對(duì)象
        //sendMessage()允許你處理Message對(duì)象(Message里可以包含數(shù)據(jù),)

        MyThread m = new MyThread();
        new Thread(m).start();
    }

    /**
    * 接受消息,處理消息 ,此Handler會(huì)與當(dāng)前主線程一塊運(yùn)行
    * */

    class MyHandler extends Handler {
        public MyHandler() {
        }

        public MyHandler(Looper L) {
            super(L);
        }

        // 子類必須重寫(xiě)此方法,接受數(shù)據(jù)
        @Override
        public void handleMessage(Message msg) {
            // TODO Auto-generated method stub
            Log.d("MyHandler", "handleMessage......");
            super.handleMessage(msg);
            // 此處可以更新UI
            Bundle b = msg.getData();
            String color = b.getString("color");
            MyHandlerActivity.this.button.append(color);

        }
    }

    class MyThread implements Runnable {
        public void run() {

            try {
                Thread.sleep(10000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            Log.d("thread.......", "mThread........");
            Message msg = new Message();
            Bundle b = new Bundle();// 存放數(shù)據(jù)
            b.putString("color", "我的");
            msg.setData(b);

            MyHandlerActivity.this.myHandler.sendMessage(msg); // 向Handler發(fā)送消息,更新UI

        }
    }