1/* 2 * Copyright (C) 2010 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 17package com.android.apps.tag.record; 18 19import com.android.apps.tag.R; 20import com.google.common.annotations.VisibleForTesting; 21import com.google.common.base.Preconditions; 22 23import android.app.Activity; 24import android.content.Context; 25import android.nfc.NdefRecord; 26import android.view.LayoutInflater; 27import android.view.View; 28import android.view.ViewGroup; 29import android.widget.TextView; 30 31import java.nio.charset.Charset; 32import java.util.Arrays; 33import java.util.Locale; 34 35/** 36 * A {@link ParsedNdefRecord} corresponding to a MIME object. 37 */ 38public class MimeRecord extends ParsedNdefRecord { 39 private final String mType; 40 private final byte[] mContent; 41 42 private MimeRecord(String mimeType, byte[] content) { 43 mType = Preconditions.checkNotNull(mimeType); 44 Preconditions.checkNotNull(content); 45 mContent = Arrays.copyOf(content, content.length); 46 } 47 48 @VisibleForTesting 49 public String getMimeType() { 50 return mType; 51 } 52 53 @VisibleForTesting 54 public byte[] getContent() { 55 return Arrays.copyOf(mContent, mContent.length); 56 } 57 58 @Override 59 public View getView(Activity activity, LayoutInflater inflater, ViewGroup parent, int offset) { 60 TextView text = (TextView) inflater.inflate(R.layout.tag_text, parent, false); 61 text.setText(mType); 62 return text; 63 } 64 65 @Override 66 public String getSnippet(Context context, Locale locale) { 67 return mType; 68 } 69 70 public static MimeRecord parse(NdefRecord record) { 71 Preconditions.checkArgument(record.getTnf() == NdefRecord.TNF_MIME_MEDIA); 72 String type = new String(record.getType(), Charset.forName("US-ASCII")); 73 byte[] payload = record.getPayload(); 74 return new MimeRecord(type, payload); 75 } 76 77 public static boolean isMime(NdefRecord record) { 78 try { 79 parse(record); 80 return true; 81 } catch (IllegalArgumentException e) { 82 return false; 83 } 84 } 85 86 public static NdefRecord newMimeRecord(String type, byte[] data) { 87 Preconditions.checkNotNull(type); 88 Preconditions.checkNotNull(data); 89 90 byte[] typeBytes = type.getBytes(Charset.forName("US-ASCII")); 91 92 return new NdefRecord(NdefRecord.TNF_MIME_MEDIA, typeBytes, new byte[0], data); 93 } 94} 95