/** * Description：自定義Timer * <p> * Created by Mjj on 2016/12/4. */public class TimeCount extends CountDownTimer {  private Button button;  //參數依次為總時長,和計時的時間間隔  public TimeCount(Button button, long millisInFuture, long countDownInterval) {    super(millisInFuture, countDownInterval);    this.button = button;  }  //計時過程顯示  @Override  public void onTick(long millisUntilFinished) {    String time = "(" + millisUntilFinished / 1000 + ")秒";    setButtonInfo(time, "#c1c1c1", false);  }  //計時完畢時觸發  @Override  public void onFinish() {    setButtonInfo("重新獲取", "#f95353", true);  }  /**   * 驗證按鈕在點擊前后相關設置   *   * @param content 要顯示的內容   * @param color  顏色值   * @param isClick 是否可點擊   */  private void setButtonInfo(String content, String color, boolean isClick) {    button.setText(content);    button.setBackgroundColor(Color.parseColor(color));    button.setClickable(isClick);  }}

/**   * 第二種方式：使用Handler   * <p>   * 靜態內部類：避免內存泄漏   */  private static class MyHandler extends Handler {    private final WeakReference<MainActivity> weakReference;    public MyHandler(MainActivity activity) {      weakReference = new WeakReference<MainActivity>(activity);    }    @Override    public void handleMessage(Message msg) {      super.handleMessage(msg);      MainActivity activity = weakReference.get();      if (activity != null) {        switch (msg.what) {          case 0:            if (msg.arg1 == 0) {              btn2.setText("重新獲取");              btn2.setBackgroundColor(Color.parseColor("#f95353"));              btn2.setClickable(true);            } else {              btn2.setText("(" + msg.arg1 + ")秒");              btn2.setBackgroundColor(Color.parseColor("#c1c1c1"));              btn2.setClickable(false);            }            break;        }      }    }  }  /**   * 監聽按鈕下直接調用即可   */  private void sendMessageClick() {    new Thread(new Runnable() {      @Override      public void run() {        for (int i = 59; i >= 0; i--) {          Message msg = myHandler.obtainMessage();          msg.arg1 = i;          myHandler.sendMessage(msg);          try {            Thread.sleep(1000);          } catch (InterruptedException e) {            e.printStackTrace();          }        }      }    }).start();  }