本文为大家分享了CountDownTimer模拟短信验证倒计时的具体代码，供大家参考，具体内容如下
内容：介绍倒计时CountDownTimer的基本使用方法。模拟短信验证
步骤：
1、继承CountDownTimer，重写onTick()、onFinish()
2、代码中new出CountDownTimer子类，传好参数，调用start()执行
代码如下：
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.leixiansheng.countdowntimer.MainActivity"> <TextView android:id="@+id/tv_getMsg" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:text="获取短信验证码" android:background="@color/colorPrimaryDark" android:textSize="16sp" android:textColor="#ffffffff" /></RelativeLayout>
TimerCount
package com.example.leixiansheng.countdowntimer; import android.os.CountDownTimer;import android.widget.TextView; /** * Created by Leixiansheng on 2018/7/18. */ public class TimerCount extends CountDownTimer { private TextView mTextView; public TimerCount(long millisInFuture, long countDownInterval, TextView textView) { super(millisInFuture, countDownInterval); mTextView = textView; } @Override public void onTick(long millisUntilFinished) { mTextView.setClickable(false); mTextView.setText("重新获取" + millisUntilFinished / 1000 + "秒"); } @Override public void onFinish() { mTextView.setClickable(true); mTextView.setText("获取短信验证码"); }} Main
package com.example.leixiansheng.countdowntimer; import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.TextView; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final TextView textView = (TextView) findViewById(R.id.tv_getMsg); textView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { /** * millisInFuture:要计数的总时长 * countDownInterval:每隔多少秒响应 */ TimerCount timerCount = new TimerCount(5000, 1000, textView); timerCount.start(); } }); }} 以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持VEVB武林网。
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