实用技巧——获取验证码的倒计时

实用技巧——获取验证码的倒计时

效果图

CountDownTimer

/**
* 第一个参数：总时长（毫秒）
* 第二个参数：多久执行一次回调（毫秒）
*/
new CountDownTimer(10000, 1000) {
@Override
public void onTick(long millisUntilFinished) {
// TODO 显示倒计时
}

@Override
public void onFinish() {
// TODO 倒计时结束
}
}.start();

封装

package kong.qingwei.countdowntimerdemo;

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

/**
* Created by kqw on 2016/5/11.
* TimeCountUtil
*/
public class TimeCountUtil extends CountDownTimer {
private Button mButton;

public TimeCountUtil(Button button, long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
this.mButton = button;
}

@Override
public void onTick(long millisUntilFinished) {
// 按钮不可用
mButton.setEnabled(false);
String showText = millisUntilFinished / 1000 + "秒后可重新发送";
mButton.setText(showText);
}

@Override
public void onFinish() {
// 按钮设置可用
mButton.setEnabled(true);
mButton.setText("重新获取验证码");
}
}

Code(参考)

测试类

package kong.qingwei.countdowntimerdemo;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

private Button mButton;
private TimeCountUtil mTimeCountUtil;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

mButton = (Button) findViewById(R.id.button);
mTimeCountUtil = new TimeCountUtil(mButton, 5000, 1000);
mButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mTimeCountUtil.start();
// TODO 请求验证码
Toast.makeText(getApplicationContext(), "请求验证码", Toast.LENGTH_SHORT).show();
}
});
}
}

XML

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="kong.qingwei.countdowntimerdemo.MainActivity">

<Button
android:id="@+id/button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/selector_button"
android:text="点击发送验证码"/>
</RelativeLayout>

drawable

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!-- 可用状态 -->
<item android:drawable="@drawable/shape_button_type1" android:state_enabled="true" />
<!-- 不可用状态 -->
<item android:drawable="@drawable/shape_button_type2" android:state_enabled="false" />
</selector>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#FF4583C9"/>
<corners android:radius="5dp"/>
<stroke android:width="1px" android:color="#FF4583C9" />
</shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#FFDDDDDD"/>
<corners android:radius="5dp"/>
<stroke android:width="1px" android:color="#FFDDDDDD" />
</shape>