AsyncTask 4.0 以后默認(rèn)串行鹃操，為了避免并行錯(cuò)誤。在3.0以上可以通過(guò)executeOnExecutor()抚垃；

HandlerThread

HandlerThread 繼承Thread, 內(nèi)部實(shí)現(xiàn)：run()方法中通過(guò)Looper.prepare()創(chuàng)建隊(duì)列喷楣，通過(guò)Looper.loop()開(kāi)啟消息循環(huán)，這樣就允許在HandlerThread 中創(chuàng)建Handler了鹤树。

new Handler(mHandlerThread.getLooper); Handler的傳入Looper創(chuàng)建方法铣焊。

//示例代碼：
private void initBackThread()
    {
        mCheckMsgThread = new HandlerThread("check-message-coming");
        mCheckMsgThread.start();
        mCheckMsgHandler = new Handler(mCheckMsgThread.getLooper())
        {
            @Override
            public void handleMessage(Message msg)
            {
                //請(qǐng)求網(wǎng)絡(luò)等耗時(shí)操作
                checkForUpdate();
                if (isUpdateInfo)
                {
                  //間隔1s重復(fù)調(diào)用HandlerThread
                mCheckMsgHandler.sendEmptyMessageDelayed(MSG_UPDATE_INFO, 1000);
                }
            }
        };
    }

private void checkForUpdate()
    {
        try
        {
            //模擬耗時(shí)
            Thread.sleep(1000);
            mHandler.post(new Runnable()
            {
                @Override
                public void run()
                {
                    String result = "實(shí)時(shí)更新中，當(dāng)前大盤指數(shù)：<font color='red'>%d</font>";
                    result = String.format(result, (int) (Math.random() * 3000 + 1000));
                    mTvServiceInfo.setText(Html.fromHtml(result));
                }
            });

        } catch (InterruptedException e)
        {
            e.printStackTrace();
        }

    }

HandlerThread鴻洋解析

IntentService
內(nèi)部維護(hù)了一個(gè)HandlerThread 和Handler 魂迄。onStartCommand()的時(shí)候會(huì)mServiceHandler.sendMessage(msg)添加到messageQueue中粗截，說(shuō)明沒(méi)調(diào)用一次就會(huì)添加一次。

private final class ServiceHandler extends Handler{
    public ServiceHandler(Looper looper){
        super(looper);
    }
  @Override
     public void handleMessage(Message msg){
        onHandleIntent((Intent)msg.obj);  // 需要用戶自行復(fù)寫處理邏輯
        stopSelf(msg.arg1); // 可以說(shuō)明IntentService當(dāng)任務(wù)處理完成后會(huì)自動(dòng)銷毀
    }
}

  public class LocalIntentService extends IntentService{
      private static final String TAG="LOCALINTENTSERVICE";
      public LocalIntentSercie(){
        super(TAG);
      }  
      @Override
      protected void onHandleIntent(Intent intent){
         //任務(wù)邏輯
         SystemClock.sleep(3000);
    }    
  
      @Override
      public void onDestory(){
        super.onDestory();  
    }
}