android子線程刷新主線程UI

今天在公司做了一個刷新UI界面的問題

當用戶點擊了錄像按鈕后，按鈕要不斷閃爍

這里就用到了線程

Handler

new Thread(mRunnable).start();//調用

* Function : 實現run()方法，每1秒發送一條Message給Handler 

 * Author : 博客園-依舊淡然 */

    private Runnable mRunnable = new Runnable() {

        public void run() {

            while(isRecord) {

                try {

                    Thread.sleep(1000);

                    mHandler.sendMessage(mHandler.obtainMessage());

                } catch (InterruptedException e) {

                    e.printStackTrace();

                }

            }

        }

    };

     * Function   :   實現handleMessage()方法，用于接收Message，刷新UI

     * Author     :   博客園-依舊淡然

     */

    private Handler mHandler = new Handler() {

        public void handleMessage(Message msg) {

            super.handleMessage(msg);

            refreshUI();

        }

    };

      //*下面這條if語句用來判斷用戶是否點擊了停止錄像按鈕

       // 若沒有改if語句，則按鈕在閃爍時，由于時延，當紅燈時點擊

        // 按鈕停止在白燈，白燈時點擊，按鈕暫停在紅燈，給用戶造成一種錯覺

        if(!isRecord){

        mImgRec.setVisibility(View.INVISIBLE);

        return;

        }

if(n % 2 == 0){

mImgRec.setVisibility(View.VISIBLE);

mImgRec.setBackgroundResource(R.drawable.controlbar_record_start);

}else if(n % 2 == 1){

//mImgRec.setBackgroundResource(R.drawable.controlbar_record_stop);

mImgRec.setVisibility(View.INVISIBLE);

}

    }