Java tutorial
//package com.java2s; import android.text.TextUtils; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static boolean isValidEmail(String s) { if (TextUtils.isEmpty(s)) { return false; } String strPattern = "\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*"; Pattern p = Pattern.compile(strPattern); Matcher m = p.matcher(s); return m.matches(); } }