验证码倒计时

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package com.example.day11;

import com.example.day11.CountDownButtonUtils.OnFinishListener;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {

@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);}public void button(View v) {    Button button = (Button) v;    CountDownButtonUtils countDownButtonUtils = new CountDownButtonUtils(            button, "发送验证码", 60, 1);    // 开始倒计时    countDownButtonUtils.start();    countDownButtonUtils.setOnFinishListener(new OnFinishListener() {        @Override        public void finish() {            Toast.makeText(MainActivity.this, "倒计时结束   ", 0).show();        }    });}

}
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package com.example.day11;

import android.os.CountDownTimer;
import android.widget.Button;

public class CountDownButtonUtils {
private CountDownTimer countDownTimer;
private OnFinishListener listener;
private Button button;

public CountDownButtonUtils(final Button button,        final String defaultString, int max, int interval) {    this.button = button;    if (max == 0 && interval == 0) {        button.setText(defaultString);        return;    }    countDownTimer = new CountDownTimer(max * 1000, interval * 1000 - 10) {        @Override        public void onTick(long time) {            button.setText("（" + ((time + 15) / 1000) + "秒）"                    + defaultString);        }        @Override        public void onFinish() {            button.setEnabled(true);            button.setText(defaultString);            if (listener != null) {                listener.finish();            }        }    };}public void start() {    button.setEnabled(false);    countDownTimer.start();}/** * 关闭倒计时,不可点击 */public void cancel(boolean isEnabled) {    countDownTimer.cancel();    if (isEnabled) {        button.setEnabled(isEnabled);    }}public void setOnFinishListener(OnFinishListener listener) {    this.listener = listener;}public interface OnFinishListener {    public void finish();}

}

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