1 /* 2 * Copyright (C) 2024 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.nfc.tech.cts.interactive; 18 19 import android.nfc.NdefMessage; 20 import android.nfc.NdefRecord; 21 22 import java.util.Arrays; 23 24 /** 25 * Class with utility methods for testing equality of messages and displaying byte payloads 26 */ 27 public class NfcUtils { 28 29 /** 30 * Checks if contents of two NdefMessages are equal 31 * @param message - first message 32 * @param otherMessage - second message 33 * @return - if first message is equal to second message 34 */ areMessagesEqual(NdefMessage message, NdefMessage otherMessage)35 public static boolean areMessagesEqual(NdefMessage message, NdefMessage otherMessage) { 36 return message != null && otherMessage != null 37 && areRecordArraysEqual(message.getRecords(), otherMessage.getRecords()); 38 } 39 areRecordArraysEqual(NdefRecord[] records, NdefRecord[] otherRecords)40 private static boolean areRecordArraysEqual(NdefRecord[] records, NdefRecord[] otherRecords) { 41 if (records.length == otherRecords.length) { 42 for (int i = 0; i < records.length; i++) { 43 if (!areRecordsEqual(records[i], otherRecords[i])) { 44 return false; 45 } 46 } 47 return true; 48 } else { 49 return false; 50 } 51 } 52 areRecordsEqual(NdefRecord record, NdefRecord otherRecord)53 private static boolean areRecordsEqual(NdefRecord record, NdefRecord otherRecord) { 54 return Arrays.equals(record.toByteArray(), otherRecord.toByteArray()); 55 } 56 displayByteArray(byte[] bytes)57 static CharSequence displayByteArray(byte[] bytes) { 58 StringBuilder builder = new StringBuilder().append("["); 59 for (int i = 0; i < bytes.length; i++) { 60 builder.append(Byte.toString(bytes[i])); 61 if (i + 1 < bytes.length) { 62 builder.append(", "); 63 } 64 } 65 return builder.append("]"); 66 } 67 } 68