Java tutorial
//package com.java2s; /* * Copyright 2013 Gerhard Klostermeier * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import android.content.Context; public class Main { public static boolean isHexAnd752Byte(String hexString, Context context) { if (hexString.matches("[0-9A-Fa-f]+") == false) { // Error, not hex. // Toast.makeText(context, R.string.info_not_hex_data, // Toast.LENGTH_LONG).show(); return false; } if (hexString.length() != 1504) { // Error, not 752 byte (1504 chars). // Toast.makeText(context, R.string.info_not_16_byte, // Toast.LENGTH_LONG).show(); return false; } return true; } }