Android实战简易教程-第七十枪（自定义实用控制之-邮箱验证EditText）

来源：互联网发布：oracle和sql语句的区别编辑：程序博客网时间：2024/05/17 09:21

我们自定义一款可以验证用户输入邮箱是否符合规范的EditText.

1.布局文件：

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="46dp"    android:background="@android:color/white" >    <EditText        android:id="@+id/edittext"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:background="@drawable/bg_edittext"        android:paddingLeft="50dp" />    <RelativeLayout        android:layout_width="46dp"        android:layout_height="match_parent" >        <ImageView            android:id="@+id/image"            android:layout_width="22dp"            android:layout_height="30dp"            android:layout_centerInParent="true"            android:scaleType="centerInside" />    </RelativeLayout></RelativeLayout>

2.自定义控件：

package com.example.drawableedittext;import java.util.regex.Matcher;import java.util.regex.Pattern;import android.content.Context;import android.text.Editable;import android.text.TextWatcher;import android.util.AttributeSet;import android.view.LayoutInflater;import android.view.View;import android.widget.EditText;import android.widget.ImageView;import android.widget.RelativeLayout;public class DrawableEditText extends RelativeLayout {private Context mContext;private EditText mEditText;private ImageView mImage;public DrawableEditText(Context context, AttributeSet attrs) {super(context, attrs);this.mContext = context;init();// 设置文字大小int textSize = attrs.getAttributeResourceValue(null, "textSize", 0);if (textSize != 0) {mEditText.setTextSize(textSize);}

// 设置edittext的hint提示int hint = attrs.getAttributeResourceValue(null, "hint", 0);if (hint != 0) {mEditText.setHint(hint);}// 设置文本颜色int textColor = attrs.getAttributeResourceValue(null, "textColor", 0);if (textColor != 0) {mEditText.setTextColor(textColor);}}// 初始化布局和控件public void init() {LayoutInflater inflater = LayoutInflater.from(mContext);View view = inflater.inflate(R.layout.drawable_edittext, this);mEditText = (EditText) view.findViewById(R.id.edittext);mImage = (ImageView) view.findViewById(R.id.image);}// 根据文本框是否为空设置不同的图片private void setDrawable() {if (checkEmail(mEditText.getText().toString())) {mImage.setImageResource(R.drawable.right);//mImage.setImageResource(nullImgRes);} else {//mImage.setImageResource(imgRes);mImage.setImageResource(R.drawable.close);}}@Overrideprotected void onFinishInflate() {super.onFinishInflate();// 文本框的text改变监听mEditText.addTextChangedListener(new TextWatcher() {@Overridepublic void onTextChanged(CharSequence s, int start, int before, int count) {}@Overridepublic void beforeTextChanged(CharSequence s, int start, int count, int after) {}@Overridepublic void afterTextChanged(Editable s) {setDrawable();}});}/** * 验证邮箱 *  * @param email * @return */public static boolean checkEmail(String email) {boolean flag = false;try {String check = "^([a-z0-9A-Z]+[-|_|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";Pattern regex = Pattern.compile(check);Matcher matcher = regex.matcher(email);flag = matcher.matches();} catch (Exception e) {flag = false;}return flag;}}

3.引入控件：

<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:layout_marginLeft="20dp"    android:layout_marginRight="20dp" >    <com.example.drawableedittext.DrawableEditText        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_centerInParent="true"        imgRes="@drawable/phonenumber_click"        nullImgRes="@drawable/phonenumber" /></RelativeLayout>

运行实例：

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