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 + "'）");
}
}
}

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