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 isNumeric(String str) { if (TextUtils.isEmpty(str)) { return false; } Pattern pattern = Pattern.compile("[0-9]*"); Matcher isNum = pattern.matcher(str); if (!isNum.matches()) { return false; } return true; } }