Android使用CountDownTimer模拟短信验证倒计时

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();
}
});
}
}

来源：https://blog.csdn.net/mr_leixiansheng/article/details/81110729