Android控件倒计时的实现，使用CountDownTimer实现比较简单，以下是将Button对象传进来的TimeCountButton类。
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 + "'）");
}
}
}