Java tutorial
//package com.java2s; import java.util.regex.Matcher; import java.util.regex.Pattern; import android.text.TextUtils; public class Main { public static boolean isEmail(String email) { if (TextUtils.isEmpty(email)) return false; Pattern pattern = Pattern .compile("^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$"); Matcher matcher = pattern.matcher(email); return matcher.matches(); } }