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public class HomeActivity extends Activity {

  @Bind(R.id.tv_hour)
  TextView tvHour;
  @Bind(R.id.tv_minute)
  TextView tvMinute;
  @Bind(R.id.tv_second)
  TextView tvSecond;

  private long mHour = 02;
  private long mMin = 15;
  private long mSecond = 36;
  private boolean isRun = true;

  private Handler timeHandler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
      super.handleMessage(msg);
      if (msg.what==1) {
        computeTime();
        if (mHour<10){
          tvHour.setText("0"+mHour+"");
        }else {
          tvHour.setText("0"+mHour+"");
        }
        if (mMin<10){
          tvMinute.setText("0"+mMin+"");
        }else {
          tvMinute.setText(mMin+"");
        }
        if (mSecond<10){
          tvSecond.setText("0"+mSecond+"");
        }else {
          tvSecond.setText(mSecond+"");
        }
      }
    }
  };

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.activity_home);
    ButterKnife.bind(this);
    startRun();
  }


  /**
   * 開(kāi)啟倒計(jì)時(shí)
   */
  private void startRun() {
    new Thread(new Runnable() {

      @Override
      public void run() {
        // TODO Auto-generated method stub
        while (isRun) {
          try {
            Thread.sleep(1000); // sleep 1000ms
            Message message = Message.obtain();
            message.what = 1;
            timeHandler.sendMessage(message);
          } catch (Exception e) {
            e.printStackTrace();
          }
        }
      }
    }).start();
  }

  /**
   * 倒計(jì)時(shí)計(jì)算
   */
  private void computeTime() {
    mSecond--;
    if (mSecond < 0) {
      mMin--;
      mSecond = 59;
      if (mMin < 0) {
        mMin = 59;
        mHour--;
      }
    }
  }
}