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;        }    }}
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