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 { /** * Check if a (hex) string is pure hex (0-9, A-F, a-f) and 16 byte (32 chars) long. If not show an error Toast in the context. * * @param hexString The string to check. * @param context The Context in which the Toast will be shown. * @return True if sting is hex an 16 Bytes long, False otherwise. */ public static boolean isHexAnd16Byte(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() != 32) { // Error, not 16 byte (32 chars). // Toast.makeText(context, R.string.info_not_16_byte, // Toast.LENGTH_LONG).show(); return false; } return true; } }