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 isValidMobilePhone(String s) { if (TextUtils.isEmpty(s)) { return false; } Pattern pattern = Pattern.compile("1[0-9]{10}"); Matcher matcher = pattern.matcher(s); return matcher.matches(); } }