首先新建一个App.class继承于Application

package com.example.xuboyu.myapplication;/** * 用于存放倒计时时间 * @author bnuzlbs-xuboyu 2017/4/5. */import java.util.Map;import android.app.Application;public class App extends Application { // 用于存放倒计时时间 public static Map map;}

然后编写TimeButton.class继承于Button

package com.example.xuboyu.myapplication;import java.util.HashMap;import java.util.Map;import java.util.Timer;import java.util.TimerTask;import android.annotation.SuppressLint;import android.content.Context;import android.os.Bundle;import android.os.Handler;import android.util.AttributeSet;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;/** * 倒计时按钮 * @author bnuzlbs-xuboyu 2017/4/5. * 注意把该类的onCreate()onDestroy()和activity的onCreate()onDestroy()同步处理 */public class TimeButton extends Button implements OnClickListener { private long lenght = 60 * 1000;// 倒计时长度,这里给了默认60秒 private String textafter = "秒后重新获取~"; private String textbefore = "点击获取验证码~"; private int colorafter; private int colorbefore; private final String TIME = "time"; private final String CTIME = "ctime"; private OnClickListener mOnclickListener; private Timer t; private TimerTask tt; private long time; Map map = new HashMap(); public TimeButton(Context context) { super(context); setOnClickListener(this); } public TimeButton(Context context, AttributeSet attrs) { super(context, attrs); setOnClickListener(this); } @SuppressLint("HandlerLeak") Handler han = new Handler() { public void handleMessage(android.os.Message msg) {  TimeButton.this.setText(time / 1000 + textafter);  time -= 1000;  if (time < 0) {  TimeButton.this.setEnabled(true);  TimeButton.this.setText(textbefore);  clearTimer();  } }; }; private void initTimer() { time = lenght; t = new Timer(); tt = new TimerTask() {  @Override  public void run() {  Log.e("xuboyu", time / 1000 + "");  han.sendEmptyMessage(0x01);//十六进制的数字1  } }; } private void clearTimer() { if (tt != null) {  tt.cancel();  tt = null; } if (t != null)  t.cancel(); t = null; } @Override public void setOnClickListener(OnClickListener l) { if (l instanceof TimeButton) {  super.setOnClickListener(l); } else  this.mOnclickListener = l; } @Override public void onClick(View v) { if (mOnclickListener != null)  mOnclickListener.onClick(v); initTimer(); this.setText(time / 1000 + textafter); this.setEnabled(false); t.schedule(tt, 0, 1000); // t.scheduleAtFixedRate(task, delay, period); } /** * 和activity的onDestroy()方法同步 */ public void onDestroy() { if (App.map == null)  App.map = new HashMap(); App.map.put(TIME, time); App.map.put(CTIME, System.currentTimeMillis()); clearTimer(); Log.e("xuboyu", "onDestroy"); } /** * 和activity的onCreate()方法同步 */ public void onCreate(Bundle bundle) { Log.e("xuboyu:倒计时相关", App.map + ""); if (App.map == null)  return; if (App.map.size() <= 0)// 这里表示没有上次未完成的计时  return; long time = System.currentTimeMillis() - App.map.get(CTIME)  - App.map.get(TIME); App.map.clear(); if (time > 0)  return; else {  initTimer();  this.time = Math.abs(time);  t.schedule(tt, 0, 1000);  this.setText(time + textafter);  this.setEnabled(false); } } /** * 设置计时时候显示的文本 */ public TimeButton setTextAfter(String text1) { this.textafter = text1; return this; } /** * 设置点击之前的文本 */ public TimeButton setTextBefore(String text0) { this.textbefore = text0; this.setText(textbefore); return this; } /** * 设置到计时长度 * @param lenght * 时间 默认毫秒 * @return */ public TimeButton setLenght(long lenght) { this.lenght = lenght; return this; }}

最后在MainActivity.class中调用

package com.example.xuboyu.myapplication;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Toast;/** * 测试主界面 * @author bnuzlbs-xuboyu 2017/4/5. */public class MainActivity extends Activity implements OnClickListener { private TimeButton v; private TimeButton v2; private TimeButton v3; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); v = (TimeButton) findViewById(R.id.button1); v.onCreate(savedInstanceState); v.setTextAfter("秒后重新排队").setTextBefore("点击开始排队").setLenght(15 * 1000); v.setOnClickListener(this); v2 = (TimeButton) findViewById(R.id.button2); v2.onCreate(savedInstanceState); v2.setTextAfter("秒后重新验证").setTextBefore("点击发送验证码").setLenght(10 * 1000); v2.setOnClickListener(this); v3 = (TimeButton) findViewById(R.id.button3); v3.onCreate(savedInstanceState); v3.setTextAfter("秒后重新倒计时").setTextBefore("点击开始倒计时").setLenght(5 * 1000); v3.setOnClickListener(this); } @Override public void onClick(View v) { // TODO Auto-generated method stub Toast.makeText(MainActivity.this, "这是处理调用者onclicklistnenr",  Toast.LENGTH_SHORT).show(); } @Override protected void onDestroy() { // TODO Auto-generated method stub v.onDestroy(); v2.onDestroy(); super.onDestroy(); }}

其中绿色按钮是使用了自定义样式的Button，使用起来也很简单

首先在drawable中新建一个样式文件mybutton.xml

然后在定义TimeButton的时候如下：

android:background="@drawable/mybutton"

那么定义出来的Button样式就为下图：

记得在AndroidManifest.xml中的Application添加：

android:name=".App"