HandlerThread特點(diǎn)：
1，與Thread類似煤杀，畢竟繼承至Thread眷蜈；
2，HandlerThread將loop轉(zhuǎn)到子線程中處理沈自，說白了就是將分擔(dān)MainLooper的工作量酌儒，降低了主線程的壓力，使主界面更流暢枯途。
3忌怎，開啟一個(gè)線程起到多個(gè)線程的作用。處理任務(wù)是串行執(zhí)行酪夷，按消息發(fā)送順序進(jìn)行處理榴啸。HandlerThread本質(zhì)是一個(gè)線程，在線程內(nèi)部晚岭，代碼是串行處理的鸥印。
4，但是由于每一個(gè)任務(wù)都將以隊(duì)列的方式逐個(gè)被執(zhí)行到，一旦隊(duì)列中有某個(gè)任務(wù)執(zhí)行時(shí)間過長辅甥，那么就會(huì)導(dǎo)致后續(xù)的任務(wù)都會(huì)被延遲處理酝润。
5，HandlerThread擁有自己的消息隊(duì)列璃弄，它不會(huì)干擾或阻塞UI線程要销。

6，對(duì)于網(wǎng)絡(luò)IO操作夏块，HandlerThread并不適合疏咐，因?yàn)樗挥幸粋€(gè)線程，還得排隊(duì)一個(gè)一個(gè)等著脐供。

public class MainActivity extends AppCompatActivity {

private String TAG = "MAinActivity";

private TextView tvText;

private Handler mHandler = new Handler();
private boolean is_startCheck = false;
private int START_CHECK = 10001;
private HandlerThread mMainMsgThread;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    tvText = (TextView) findViewById(R.id.id_textview);

    initBackThread();
}

@Override
protected void onResume() {
    super.onResume();

    is_startCheck = true;

    if (mHandler != null)
        mHandler.sendEmptyMessage(START_CHECK);
}

@Override
protected void onPause() {
    super.onPause();
    is_startCheck = false;
    if (mHandler != null)
        mHandler.removeCallbacksAndMessages(null);
}

private void initBackThread() {

    mMainMsgThread = new HandlerThread("MainActiivity");

    mMainMsgThread.start();

    mHandler = new Handler(mMainMsgThread.getLooper()) {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);

            checkForUpdate();

            if (is_startCheck) {
                mHandler.sendEmptyMessageDelayed(START_CHECK, 1000);
            }
        }
    };

}


// 模擬從服務(wù)器解析數(shù)據(jù)
private void checkForUpdate() {
    try {
        //模擬耗時(shí)
        Thread.sleep(1000);
        mHandler.post(new Runnable() {
            @Override
            public void run() {
                String result = "當(dāng)前幸運(yùn)指數(shù)：<font color='red'>%d</font>";
                result = String.format(result, (int) (Math.random() * 3000 + 1000));

                final String finalResult = result;
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        tvText.setText(Html.fromHtml(finalResult));
                    }
                });

            }
        });

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

@Override
protected void onDestroy() {
    super.onDestroy();
    //釋放資源
    mMainMsgThread.quit();

    Log.e(TAG, " ---onDestroy()--- ");
}

}