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.tagcanon;
18
19import com.android.apps.tag.MockNdefMessages;
20import com.google.common.base.Preconditions;
21import com.google.common.primitives.Bytes;
22
23import android.app.ListActivity;
24import android.content.Intent;
25import android.content.res.Resources;
26import android.graphics.Bitmap;
27import android.graphics.drawable.BitmapDrawable;
28import android.graphics.drawable.Drawable;
29import android.nfc.NdefMessage;
30import android.nfc.NdefRecord;
31import android.nfc.NfcAdapter;
32import android.os.Bundle;
33import android.view.View;
34import android.widget.ArrayAdapter;
35import android.widget.ListView;
36
37import java.io.ByteArrayOutputStream;
38import java.io.IOException;
39import java.nio.charset.Charset;
40import java.nio.charset.Charsets;
41import java.util.Locale;
42
43/**
44 * A test activity that launches tags as if they had been scanned.
45 */
46public class TagCanon extends ListActivity {
47    static final String TAG = "TagCanon";
48    static final byte[] UID = new byte[] { 0x05, 0x00, 0x03, 0x08 };
49
50    ArrayAdapter<TagDescription> mAdapter;
51
52    public static NdefRecord newTextRecord(String text, Locale locale, boolean encodeInUtf8) {
53        Preconditions.checkNotNull(text);
54        Preconditions.checkNotNull(locale);
55
56        byte[] langBytes = locale.getLanguage().getBytes(Charsets.US_ASCII);
57
58        Charset utfEncoding = encodeInUtf8 ? Charsets.UTF_8 : Charset.forName("UTF-16");
59        byte[] textBytes = text.getBytes(utfEncoding);
60
61        int utfBit = encodeInUtf8 ? 0 : (1 << 7);
62        char status = (char) (utfBit + langBytes.length);
63
64        byte[] data = Bytes.concat(
65           new byte[] { (byte) status },
66           langBytes,
67           textBytes
68        );
69
70        return new NdefRecord(NdefRecord.TNF_WELL_KNOWN, NdefRecord.RTD_TEXT, new byte[0], data);
71    }
72
73    public static NdefRecord newMimeRecord(String type, byte[] data) {
74        Preconditions.checkNotNull(type);
75        Preconditions.checkNotNull(data);
76
77        byte[] typeBytes = type.getBytes(Charsets.US_ASCII);
78
79        return new NdefRecord(NdefRecord.TNF_MIME_MEDIA, typeBytes, new byte[0], data);
80    }
81
82    final NdefMessage[] buildImageMessages() {
83        Resources res = getResources();
84        Drawable drawable = res.getDrawable(R.drawable.ic_launcher_nfc);
85        Bitmap photo = ((BitmapDrawable) drawable).getBitmap();
86        final int size = photo.getWidth() * photo.getHeight() * 4;
87        final ByteArrayOutputStream out = new ByteArrayOutputStream(size);
88
89        try {
90            photo.compress(Bitmap.CompressFormat.PNG, 100, out);
91            out.flush();
92            byte[] payload = out.toByteArray();
93            out.close();
94
95            NdefRecord text = newTextRecord("There's an image below this text!", Locale.US, true);
96            NdefRecord image = newMimeRecord("image/png", payload);
97            NdefMessage[] msgs = new NdefMessage[] {
98                    new NdefMessage(new NdefRecord[] { text, image }) };
99
100            return msgs;
101        } catch (IOException e) {
102            throw new RuntimeException("Failed to compress image", e);
103        }
104    }
105
106    static final class TagDescription {
107        public String title;
108        NdefMessage[] msgs;
109
110        public TagDescription(String title, byte[] bytes) {
111            this.title = title;
112            try {
113                msgs = new NdefMessage[] { new NdefMessage(bytes) };
114            } catch (Exception e) {
115                throw new RuntimeException("Failed to create tag description", e);
116            }
117        }
118
119        public TagDescription(String title, NdefMessage[] msgs) {
120            this.title = title;
121            this.msgs = msgs;
122        }
123
124        @Override
125        public String toString() {
126            return title;
127        }
128    }
129
130    @Override
131    public void onCreate(Bundle savedState) {
132        super.onCreate(savedState);
133        ArrayAdapter<TagDescription> adapter = new ArrayAdapter<TagDescription>(this,
134                android.R.layout.simple_list_item_1, android.R.id.text1);
135        adapter.add(new TagDescription("Image", buildImageMessages()));
136        adapter.add(new TagDescription("Real NFC message", MockNdefMessages.REAL_NFC_MSG));
137        adapter.add(new TagDescription("Call Google", MockNdefMessages.CALL_GOOGLE));
138        adapter.add(new TagDescription("English text", MockNdefMessages.ENGLISH_PLAIN_TEXT));
139        adapter.add(new TagDescription("Send text message", MockNdefMessages.SEND_TEXT_MESSAGE));
140        adapter.add(new TagDescription("SmartPoster URL & text", MockNdefMessages.SMART_POSTER_URL_AND_TEXT));
141        adapter.add(new TagDescription("SmartPoster URL", MockNdefMessages.SMART_POSTER_URL_NO_TEXT));
142        adapter.add(new TagDescription("VCARD", MockNdefMessages.VCARD));
143        adapter.add(new TagDescription("URI", MockNdefMessages.URI));
144        setListAdapter(adapter);
145        mAdapter = adapter;
146    }
147
148    @Override
149    public void onListItemClick(ListView l, View v, int position, long id) {
150        TagDescription description = mAdapter.getItem(position);
151        Intent intent = new Intent(NfcAdapter.ACTION_TAG_DISCOVERED);
152        intent.putExtra(NfcAdapter.EXTRA_NDEF_MESSAGES, description.msgs);
153        startActivity(intent);
154    }
155}
156