Android自定义倒计时按钮

package com.dylan.frame.ui;import android.content.Context;import android.os.Handler;import android.os.Message;import android.util.AttributeSet;import android.view.View;import android.widget.Button;import java.util.Timer;import java.util.TimerTask;/** * 自定义倒计时按钮 * <p/> * * @author Dylan *   <p/> *   [佛祖保佑 永无BUG] *   Created by Dylan on 2015/11/5 0005. */public class CountdownButton extends Button implements View.OnClickListener { private long lenght = 60 * 1000;//默认倒计时时间； private long time;//倒计时时长 private Timer timer;//开始执行倒计时 private TimerTask timerTask;//每次倒计时执行的任务 private String beforeText = "点击获取验证码"; private String afterText = "秒后重新获取"; private OnClickListener onClickListener;//按钮点击事件 /**  * 更新显示的文本  */ private Handler handler = new Handler() {  @Override  public void handleMessage(Message msg) {   super.handleMessage(msg);   CountdownButton.this.setText(time / 1000 + afterText);   time -= 1000;   if (time < 0) {    CountdownButton.this.setEnabled(true);    CountdownButton.this.setText(beforeText);    clearTimer();   }  } }; public CountdownButton(Context context) {  super(context);  this.setText(beforeText);  setOnClickListener(this); } public CountdownButton(Context context, AttributeSet attrs) {  super(context, attrs);  setOnClickListener(this); } public CountdownButton(Context context, AttributeSet attrs, int defStyleAttr) {  super(context, attrs, defStyleAttr);  setOnClickListener(this); } /**  * 清除倒计时  */ private void clearTimer() {  if (timerTask != null) {   timerTask.cancel();   timerTask = null;  }  if (timer != null) {   timer.cancel();   timer = null;  } } /**  * 设置倒计时时长  *  * @param lenght 默认毫秒  */ public void setLenght(long lenght) {  this.lenght = lenght; } /**  * 设置未点击时显示的文字  *  * @param beforeText  */ public void setBeforeText(String beforeText) {  this.beforeText = beforeText; } /**  * 设置未点击后显示的文字  *  * @param beforeText  */ public void setAfterText(String afterText) {  this.afterText = afterText; } /**  * 点击按钮后的操作  *  * @param v  */ @Override public void onClick(View v) {  if (onClickListener != null) {   onClickListener.onClick(v);  }  initTimer();  this.setText(time / 1000 + afterText);  this.setEnabled(false);  timer.schedule(timerTask, 0, 1000); } /**  * 初始化时间  */ private void initTimer() {  time = lenght;  timer = new Timer();  timerTask = new TimerTask() {   @Override   public void run() {    handler.sendEmptyMessage(1);   }  }; } /**  * 设置监听按钮点击事件  *  * @param onclickListener  */ @Override public void setOnClickListener(OnClickListener onclickListener) {  if (onclickListener instanceof CountdownButton) {   super.setOnClickListener(onclickListener);  } else {   this.onClickListener = onclickListener;  } }}