Android控件倒計時的實現

Android控件倒計時的實現，使用CountDownTimer實現比較簡單，以下是將Button對象傳進來的TimeCountButton類。

public class CountDownButton extends CountDownTimer {
 public static final int TIME_COUNT_FUTURE = 60000;
 public static final int TIME_COUNT_INTERVAL = 1000;
 
 private Context mContext;
 private Button mButton;
 private String mOriginalText;
 private Drawable mOriginalBackground;
 private Drawable mTickBackground;
 private int mOriginalTextColor;
 
 public CountDownButton() {
  super(TIME_COUNT_FUTURE, TIME_COUNT_INTERVAL);
 }
 
 public CountDownButton(long millisInFuture, long countDownInterval) {
  super(millisInFuture, countDownInterval);
 }
 
 public void init(Context context, Button button) {
  this.mContext = context;
  this.mButton = button;
  this.mOriginalText = mButton.getText().toString();
  this.mOriginalBackground = mButton.getBackground();
  this.mTickBackground = this.mOriginalBackground;
  this.mOriginalTextColor = mButton.getCurrentTextColor();
 }
 
 public void setTickDrawable(Drawable tickDrawable) {
  this.mTickBackground = tickDrawable;
 }

 @Override
 public void onFinish() {
  if (mContext != null && mButton != null) {
   mButton.setText(mOriginalText);
   mButton.setTextColor(mOriginalTextColor);
   mButton.setBackgroundDrawable(mOriginalBackground);
   mButton.setClickable(true);
  }
 }

 @Override
 public void onTick(long millisUntilFinished) {
  if (mContext != null && mButton != null) {
   mButton.setClickable(false);
   mButton.setBackgroundDrawable(mTickBackground);
   mButton.setTextColor(mContext.getResources().getColor(android.R.color.darker_gray));
   mButton.setText(mOriginalText + "（" + millisUntilFinished / 1000 + "'）");
  }
 }
}

更多Android相關信息見Android 專題頁面 http://www.linuxidc.com/topicnews.aspx?tid=11