Android倒计时获取验证码按钮，先上图：
封装类：
package KiraUtils.view; import android.annotation.SuppressLint; import android.content.Context; import android.graphics.Color; import android.os.Bundle; import android.os.Handler; import android.util.AttributeSet; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import java.util.HashMap; import java.util.Map; import java.util.Timer; import java.util.TimerTask; /** * Created by kira on 2017/4/24. */ public class TimeButton extends Button implements OnClickListener { private long lenght = 60 * 1000;// 倒计时长度,默认60秒 private String textafter = "秒后重新获取"; private String textbefore = "获取验证码"; private final String TIME = "time"; private final String CTIME = "ctime"; private OnClickListener mOnclickListener; private Timer timer; private TimerTask timerTask; private long time; Map<String, Long> map = new HashMap<String, Long>(); public TimeButton(Context context) { super(context); setOnClickListener(this); } public TimeButton(Context context, AttributeSet attrs) { super(context, attrs); setOnClickListener(this); } //实现倒计时 @SuppressLint("HandlerLeak") Handler handler = 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); TimeButton.this.setTextColor(Color.parseColor("#008040")); clearTimer(); } } }; private void initTimer() { time = lenght; timer = new Timer(); timerTask = new TimerTask() { @Override public void run() { handler.sendEmptyMessage(0x01); } }; } private void clearTimer() { if (timerTask != null) { timerTask.cancel(); timerTask = null; } if (timerTask != null) timerTask.cancel(); timerTask = 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); timer.schedule(timerTask, 0, 1000); } public void onDestroy() { if (map == null) map = new HashMap<String, Long>(); map.put(TIME, time); map.put(CTIME, System.currentTimeMillis()); clearTimer();//activity销毁时同时将timerTask取消掉 } public void onCreate(Bundle bundle) { if (map == null) return; if (map.size() <= 0)// 上次未完成的计时 return; long time = System.currentTimeMillis() - map.get(CTIME) -map.get(TIME); map.clear(); if (time > 0) return; else { initTimer(); this.time = Math.abs(time); timer.schedule(timerTask, 0, 1000); this.setText(time + textafter); this.setEnabled(false); } } //设置计时显示文本 public TimeButton setTextAfter(String text1) { this.textafter = text1; return this; } //设置点击之前文本 public TimeButton setTextBefore(String text0) { this.textbefore = text0; this.setText(textbefore); return this; } //设置倒计时时间 public TimeButton setLenght(long lenght) { this.lenght = lenght; return this; } }布局文件直接引用类就行了
<KiraUtils.view.TimeButton android:id="@+id/tv_getcode" android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_gravity="center_vertical" android:text="获取验证码" android:background="@null" android:gravity="center" android:textColor="#008040" />在Activity中为按钮添加点击事件就行了
<KiraUtils.view.TimeButton android:id="@+id/tv_getcode" android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_gravity="center_vertical" android:text="获取验证码" android:background="@null" android:gravity="center" android:textColor="#008040" />
