package com.android.apps.tag;
-import com.google.common.base.Preconditions;
-import com.google.common.collect.BiMap;
-import com.google.common.collect.ImmutableBiMap;
+import com.android.apps.tag.record.ParsedNdefRecord;
+import com.android.apps.tag.record.SmartPoster;
+import com.android.apps.tag.record.TextRecord;
+import com.android.apps.tag.record.UriRecord;
import com.google.common.collect.Iterables;
import com.google.common.primitives.Bytes;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
-import java.io.UnsupportedEncodingException;
-import java.net.URISyntaxException;
import java.nio.charset.Charsets;
import java.util.ArrayList;
-import java.util.Arrays;
import java.util.List;
/**
private static final byte[] EMPTY = new byte[0];
/**
- * NFC Forum "URI Record Type Definition"
- *
- * This is a mapping of "URI Identifier Codes" to URI string prefixes,
- * per section 3.2.2 of the NFC Forum URI Record Type Definition document.
- */
- private static final BiMap<Byte, String> URI_PREFIX_MAP = ImmutableBiMap.<Byte, String>builder()
- .put((byte) 0x00, "")
- .put((byte) 0x01, "http://www.")
- .put((byte) 0x02, "https://www.")
- .put((byte) 0x03, "http://")
- .put((byte) 0x04, "https://")
- .put((byte) 0x05, "tel:")
- .put((byte) 0x06, "mailto:")
- .put((byte) 0x07, "ftp://anonymous:anonymous@")
- .put((byte) 0x08, "ftp://ftp.")
- .put((byte) 0x09, "ftps://")
- .put((byte) 0x0A, "sftp://")
- .put((byte) 0x0B, "smb://")
- .put((byte) 0x0C, "nfs://")
- .put((byte) 0x0D, "ftp://")
- .put((byte) 0x0E, "dav://")
- .put((byte) 0x0F, "news:")
- .put((byte) 0x10, "telnet://")
- .put((byte) 0x11, "imap:")
- .put((byte) 0x12, "rtsp://")
- .put((byte) 0x13, "urn:")
- .put((byte) 0x14, "pop:")
- .put((byte) 0x15, "sip:")
- .put((byte) 0x16, "sips:")
- .put((byte) 0x17, "tftp:")
- .put((byte) 0x18, "btspp://")
- .put((byte) 0x19, "btl2cap://")
- .put((byte) 0x1A, "btgoep://")
- .put((byte) 0x1B, "tcpobex://")
- .put((byte) 0x1C, "irdaobex://")
- .put((byte) 0x1D, "file://")
- .put((byte) 0x1E, "urn:epc:id:")
- .put((byte) 0x1F, "urn:epc:tag:")
- .put((byte) 0x20, "urn:epc:pat:")
- .put((byte) 0x21, "urn:epc:raw:")
- .put((byte) 0x22, "urn:epc:")
- .put((byte) 0x23, "urn:nfc:")
- .build();
-
- /**
* Create a new {@link NdefRecord} containing the supplied {@link Uri}.
*/
public static NdefRecord toUriRecord(Uri uri) {
NdefRecord.RTD_URI, EMPTY, payload);
}
- /**
- * Convert {@link NdefRecord} into a {@link Uri}.
- *
- * TODO: This class does not handle NdefRecords where the TNF
- * (Type Name Format) of the class is {@link NdefRecord#TNF_ABSOLUTE_URI}.
- * This should be fixed.
- *
- * @throws IllegalArgumentException if the NdefRecord is not a
- * record containing a URI.
- */
- public static Uri toUri(NdefRecord record) {
- Preconditions.checkArgument(record.getTnf() == NdefRecord.TNF_WELL_KNOWN);
- Preconditions.checkArgument(Arrays.equals(record.getType(), NdefRecord.RTD_URI));
-
- byte[] payload = record.getPayload();
-
- /*
- * payload[0] contains the URI Identifier Code, per the
- * NFC Forum "URI Record Type Definition" section 3.2.2.
- *
- * payload[1]...payload[payload.length - 1] contains the rest of
- * the URI.
- */
-
- String prefix = URI_PREFIX_MAP.get(payload[0]);
- byte[] fullUri = Bytes.concat(
- prefix.getBytes(Charsets.UTF_8),
- Arrays.copyOfRange(payload, 1, payload.length));
-
- return Uri.parse(new String(fullUri, Charsets.UTF_8));
- }
-
- public static boolean isUri(NdefRecord record) {
- try {
- toUri(record);
- return true;
- } catch (IllegalArgumentException e) {
- return false;
- }
- }
-
- /**
- * Extracts payload text from Text type ndef record.
- *
- * @param record A ndef record. Must be {@link NdefRecord#TYPE_TEXT}.
- * @return text payload.
- */
- public static String toText(NdefRecord record) {
- Preconditions.checkArgument(record.getTnf() == NdefRecord.TNF_WELL_KNOWN);
- Preconditions.checkArgument(Arrays.equals(record.getType(), NdefRecord.RTD_TEXT));
- try {
-
- byte[] payload = record.getPayload();
-
- /*
- * payload[0] contains the "Status Byte Encodings" field, per
- * the NFC Forum "Text Record Type Definition" section 3.2.1.
- *
- * bit7 is the Text Encoding Field.
- *
- * if (Bit_7 == 0): The text is encoded in UTF-8
- * if (Bit_7 == 1): The text is encoded in UTF16
- *
- * Bit_6 is reserved for future use and must be set to zero.
- *
- * Bits 5 to 0 are the length of the IANA language code.
- */
-
- String textEncoding = ((payload[0] & 0200) == 0) ? "UTF-8" : "UTF-16";
- int languageCodeLength = payload[0] & 0077;
-
- return new String(payload,
- languageCodeLength + 1,
- payload.length - languageCodeLength - 1,
- textEncoding);
- } catch (UnsupportedEncodingException e) {
- // should never happen unless we get a malformed tag.
- throw new IllegalArgumentException(e);
- }
- }
-
- public static boolean isText(NdefRecord record) {
- try {
- toText(record);
- return true;
- } catch (IllegalArgumentException e) {
- return false;
- }
- }
-
- public static Iterable<String> getTextFields(NdefMessage message) {
- return Iterables.filter(getObjects(message), String.class);
+ public static Iterable<TextRecord> getTextFields(NdefMessage message) {
+ return Iterables.filter(getObjects(message), TextRecord.class);
}
- public static Iterable<Uri> getUris(NdefMessage message) {
- return Iterables.filter(getObjects(message), Uri.class);
+ public static Iterable<UriRecord> getUris(NdefMessage message) {
+ return Iterables.filter(getObjects(message), UriRecord.class);
}
/**
* <p>
* TODO: Is this API too generic? Should we keep it?
*/
- public static Iterable<Object> getObjects(NdefMessage message) {
- List<Object> retval = new ArrayList<Object>();
+ public static Iterable<ParsedNdefRecord> getObjects(NdefMessage message) {
+ List<ParsedNdefRecord> retval = new ArrayList<ParsedNdefRecord>();
for (NdefRecord record : message.getRecords()) {
- if (isUri(record)) {
- retval.add(toUri(record));
- } else if (isText(record)) {
- retval.add(toText(record));
+ if (UriRecord.isUri(record)) {
+ retval.add(UriRecord.parse(record));
+ } else if (TextRecord.isText(record)) {
+ retval.add(TextRecord.parse(record));
} else if (SmartPoster.isPoster(record)) {
- retval.add(SmartPoster.from(record));
+ retval.add(SmartPoster.parse(record));
}
}
return retval;
import android.widget.Adapter;
import android.widget.CursorAdapter;
import android.widget.TextView;
+import com.android.apps.tag.record.SmartPoster;
+import com.android.apps.tag.record.TextRecord;
+import com.android.apps.tag.record.UriRecord;
/**
* A custom {@link Adapter} that renders tag entries for a list.
mainLine.setText("Invalid tag");
} else {
try {
- SmartPoster poster = SmartPoster.from(msg.getRecords()[0]);
- mainLine.setText(poster.getTitle());
+ SmartPoster poster = SmartPoster.parse(msg.getRecords()[0]);
+ TextRecord title = poster.getTitle();
+ if (title != null) {
+ mainLine.setText(title.getText());
+ }
} catch (IllegalArgumentException e) {
// Not a smart poster
NdefRecord record = msg.getRecords()[0];
Uri uri = null;
try {
- uri = NdefUtil.toUri(record);
+ uri = UriRecord.parse(record).getUri();
mainLine.setText(uri.toString());
} catch (IllegalArgumentException e2) {
mainLine.setText("Not a smart poster or URL");
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Color;
-import android.net.Uri;
import android.nfc.NdefMessage;
import android.nfc.NdefTag;
import android.nfc.NfcAdapter;
import android.view.WindowManager;
import android.widget.LinearLayout;
import android.widget.TextView;
+import com.android.apps.tag.record.ParsedNdefRecord;
+import com.android.apps.tag.record.SmartPoster;
+import com.android.apps.tag.record.TextRecord;
+import com.android.apps.tag.record.UriRecord;
/**
* An {@link Activity} which handles a broadcast of a new tag that the device just discovered.
// Build the views from the logical records in the messages
boolean first = true;
for (NdefMessage msg : msgs) {
- Iterable<Object> objects = NdefUtil.getObjects(msg);
- for (Object object : objects) {
+ Iterable<ParsedNdefRecord> objects = NdefUtil.getObjects(msg);
+ for (ParsedNdefRecord object : objects) {
if (!first) {
list.addView(inflater.inflate(R.layout.tag_divider, list, false));
first = false;
}
- if (object instanceof String) {
+ if (object instanceof TextRecord) {
+ TextRecord textRecord = (TextRecord) object;
TextView text = (TextView) inflater.inflate(R.layout.tag_text, list, false);
- text.setText((CharSequence) object);
+ text.setText(textRecord.getText());
list.addView(text);
- } else if (object instanceof Uri) {
+ } else if (object instanceof UriRecord) {
+ UriRecord uriRecord = (UriRecord) object;
TextView text = (TextView) inflater.inflate(R.layout.tag_text, list, false);
- text.setText(object.toString());
+ text.setText(uriRecord.getUri().toString());
list.addView(text);
} else if (object instanceof SmartPoster) {
TextView text = (TextView) inflater.inflate(R.layout.tag_text, list, false);
SmartPoster poster = (SmartPoster) object;
- text.setText(poster.getTitle());
+ TextRecord title = poster.getTitle();
+ if (title != null) {
+ text.setText(title.getText());
+ }
list.addView(text);
}
}
--- /dev/null
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.apps.tag.record;
+
+/**
+ * TODO: come up with a better name.
+ */
+public interface ParsedNdefRecord {
+
+ // Just a placeholder for now. Probably not needed nor desired.
+ public String getRecordType();
+}
* limitations under the License.
*/
-package com.android.apps.tag;
+package com.android.apps.tag.record;
+import com.android.apps.tag.NdefUtil;
import com.google.common.base.Preconditions;
import com.google.common.collect.Iterables;
-import android.net.Uri;
import android.nfc.FormatException;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
/**
* A representation of an NFC Forum "Smart Poster".
*/
-public class SmartPoster {
+public class SmartPoster implements ParsedNdefRecord {
/**
* NFC Forum Smart Poster Record Type Definition section 3.2.1.
* This record is optional."
*/
- private final String mTitleRecord;
+ private final TextRecord mTitleRecord;
/**
* NFC Forum Smart Poster Record Type Definition section 3.2.1.
* records are just metadata about this record. There MUST be one URI
* record and there MUST NOT be more than one."
*/
- private final Uri mUriRecord;
+ private final UriRecord mUriRecord;
- private SmartPoster(Uri uri, @Nullable String title) {
+ private SmartPoster(UriRecord uri, @Nullable TextRecord title) {
mUriRecord = Preconditions.checkNotNull(uri);
mTitleRecord = title;
}
- public Uri getUri() {
+ public UriRecord getUriRecord() {
return mUriRecord;
}
/**
* Returns the title of the smart poster. This may be {@code null}.
*/
- public String getTitle() {
+ public TextRecord getTitle() {
return mTitleRecord;
}
- public static SmartPoster from(NdefRecord record) {
+ public static SmartPoster parse(NdefRecord record) {
Preconditions.checkArgument(record.getTnf() == NdefRecord.TNF_WELL_KNOWN);
Preconditions.checkArgument(Arrays.equals(record.getType(), NdefRecord.RTD_SMART_POSTER));
try {
NdefMessage subRecords = new NdefMessage(record.getPayload());
- Uri uri = Iterables.getOnlyElement(NdefUtil.getUris(subRecords));
- Iterable<String> textFields = NdefUtil.getTextFields(subRecords);
- String title = null;
+ UriRecord uri = Iterables.getOnlyElement(NdefUtil.getUris(subRecords));
+ Iterable<TextRecord> textFields = NdefUtil.getTextFields(subRecords);
+ TextRecord title = null;
if (!Iterables.isEmpty(textFields)) {
title = Iterables.get(textFields, 0);
}
public static boolean isPoster(NdefRecord record) {
try {
- from(record);
+ parse(record);
return true;
} catch (IllegalArgumentException e) {
return false;
}
}
+
+ @Override
+ public String getRecordType() {
+ return "SmartPoster";
+ }
}
--- /dev/null
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.apps.tag.record;
+
+import android.nfc.NdefRecord;
+import com.google.common.base.Preconditions;
+
+import java.io.UnsupportedEncodingException;
+import java.util.Arrays;
+
+/**
+ * An NFC Text Record
+ */
+public class TextRecord implements ParsedNdefRecord {
+
+ private final String mLanguageCode;
+ private final String mText;
+
+ private TextRecord(String languageCode, String text) {
+ mLanguageCode = Preconditions.checkNotNull(languageCode);
+ mText = Preconditions.checkNotNull(text);
+ }
+
+ @Override
+ public String getRecordType() {
+ return "Text";
+ }
+
+ public String getText() {
+ return mText;
+ }
+
+ public String getLanguageCode() {
+ return mLanguageCode;
+ }
+
+ // TODO: deal with text fields which span multiple NdefRecords
+ public static TextRecord parse(NdefRecord record) {
+ Preconditions.checkArgument(record.getTnf() == NdefRecord.TNF_WELL_KNOWN);
+ Preconditions.checkArgument(Arrays.equals(record.getType(), NdefRecord.RTD_TEXT));
+ try {
+
+ byte[] payload = record.getPayload();
+
+ /*
+ * payload[0] contains the "Status Byte Encodings" field, per
+ * the NFC Forum "Text Record Type Definition" section 3.2.1.
+ *
+ * bit7 is the Text Encoding Field.
+ *
+ * if (Bit_7 == 0): The text is encoded in UTF-8
+ * if (Bit_7 == 1): The text is encoded in UTF16
+ *
+ * Bit_6 is reserved for future use and must be set to zero.
+ *
+ * Bits 5 to 0 are the length of the IANA language code.
+ */
+
+ String textEncoding = ((payload[0] & 0200) == 0) ? "UTF-8" : "UTF-16";
+ int languageCodeLength = payload[0] & 0077;
+
+ String languageCode = new String(payload, 1, languageCodeLength, "US-ASCII");
+ String text = new String(payload,
+ languageCodeLength + 1,
+ payload.length - languageCodeLength - 1,
+ textEncoding);
+ return new TextRecord(languageCode, text);
+
+ } catch (UnsupportedEncodingException e) {
+ // should never happen unless we get a malformed tag.
+ throw new IllegalArgumentException(e);
+ }
+ }
+
+ public static boolean isText(NdefRecord record) {
+ try {
+ parse(record);
+ return true;
+ } catch (IllegalArgumentException e) {
+ return false;
+ }
+ }
+}
--- /dev/null
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.apps.tag.record;
+
+import android.net.Uri;
+import android.nfc.NdefRecord;
+import com.google.common.base.Preconditions;
+import com.google.common.collect.BiMap;
+import com.google.common.collect.ImmutableBiMap;
+import com.google.common.primitives.Bytes;
+
+import java.nio.charset.Charsets;
+import java.util.Arrays;
+
+/**
+ * A parsed record containing a Uri.
+ */
+public class UriRecord implements ParsedNdefRecord {
+ private static final byte[] EMPTY = new byte[0];
+
+ /**
+ * NFC Forum "URI Record Type Definition"
+ *
+ * This is a mapping of "URI Identifier Codes" to URI string prefixes,
+ * per section 3.2.2 of the NFC Forum URI Record Type Definition document.
+ */
+ private static final BiMap<Byte, String> URI_PREFIX_MAP = ImmutableBiMap.<Byte, String>builder()
+ .put((byte) 0x00, "")
+ .put((byte) 0x01, "http://www.")
+ .put((byte) 0x02, "https://www.")
+ .put((byte) 0x03, "http://")
+ .put((byte) 0x04, "https://")
+ .put((byte) 0x05, "tel:")
+ .put((byte) 0x06, "mailto:")
+ .put((byte) 0x07, "ftp://anonymous:anonymous@")
+ .put((byte) 0x08, "ftp://ftp.")
+ .put((byte) 0x09, "ftps://")
+ .put((byte) 0x0A, "sftp://")
+ .put((byte) 0x0B, "smb://")
+ .put((byte) 0x0C, "nfs://")
+ .put((byte) 0x0D, "ftp://")
+ .put((byte) 0x0E, "dav://")
+ .put((byte) 0x0F, "news:")
+ .put((byte) 0x10, "telnet://")
+ .put((byte) 0x11, "imap:")
+ .put((byte) 0x12, "rtsp://")
+ .put((byte) 0x13, "urn:")
+ .put((byte) 0x14, "pop:")
+ .put((byte) 0x15, "sip:")
+ .put((byte) 0x16, "sips:")
+ .put((byte) 0x17, "tftp:")
+ .put((byte) 0x18, "btspp://")
+ .put((byte) 0x19, "btl2cap://")
+ .put((byte) 0x1A, "btgoep://")
+ .put((byte) 0x1B, "tcpobex://")
+ .put((byte) 0x1C, "irdaobex://")
+ .put((byte) 0x1D, "file://")
+ .put((byte) 0x1E, "urn:epc:id:")
+ .put((byte) 0x1F, "urn:epc:tag:")
+ .put((byte) 0x20, "urn:epc:pat:")
+ .put((byte) 0x21, "urn:epc:raw:")
+ .put((byte) 0x22, "urn:epc:")
+ .put((byte) 0x23, "urn:nfc:")
+ .build();
+
+ private final Uri mUri;
+
+ private UriRecord(Uri uri) {
+ this.mUri = Preconditions.checkNotNull(uri);
+ }
+
+ @Override
+ public String getRecordType() {
+ return "Uri";
+ }
+
+ public Uri getUri() {
+ return mUri;
+ }
+
+ /**
+ * Convert {@link android.nfc.NdefRecord} into a {@link android.net.Uri}.
+ *
+ * TODO: This class does not handle NdefRecords where the TNF
+ * (Type Name Format) of the class is {@link android.nfc.NdefRecord#TNF_ABSOLUTE_URI}.
+ * This should be fixed.
+ *
+ * @throws IllegalArgumentException if the NdefRecord is not a
+ * record containing a URI.
+ */
+ public static UriRecord parse(NdefRecord record) {
+ Preconditions.checkArgument(record.getTnf() == NdefRecord.TNF_WELL_KNOWN);
+ Preconditions.checkArgument(Arrays.equals(record.getType(), NdefRecord.RTD_URI));
+
+ byte[] payload = record.getPayload();
+
+ /*
+ * payload[0] contains the URI Identifier Code, per the
+ * NFC Forum "URI Record Type Definition" section 3.2.2.
+ *
+ * payload[1]...payload[payload.length - 1] contains the rest of
+ * the URI.
+ */
+
+ String prefix = URI_PREFIX_MAP.get(payload[0]);
+ byte[] fullUri = Bytes.concat(
+ prefix.getBytes(Charsets.UTF_8),
+ Arrays.copyOfRange(payload, 1, payload.length));
+
+ return new UriRecord(Uri.parse(new String(fullUri, Charsets.UTF_8)));
+ }
+
+ public static boolean isUri(NdefRecord record) {
+ try {
+ parse(record);
+ return true;
+ } catch (IllegalArgumentException e) {
+ return false;
+ }
+ }
+}
package com.android.apps.tag;
import android.test.AndroidTestCase;
+import com.android.apps.tag.record.TextRecord;
import com.google.common.primitives.Bytes;
import android.nfc.NdefRecord;
);
NdefRecord record = new NdefRecord(NdefRecord.TNF_WELL_KNOWN, NdefRecord.RTD_TEXT, new byte[0], data);
- assertEquals(word, NdefUtil.toText(record));
+ assertEquals(word, TextRecord.parse(record).getText());
}
}
import android.test.AndroidTestCase;
import android.nfc.NdefMessage;
+import com.android.apps.tag.record.SmartPoster;
/**
* Tests for {@link SmartPoster}.
public void testSmartPoster() throws Exception {
NdefMessage msg = new NdefMessage(MockNdefMessages.REAL_NFC_MSG);
- SmartPoster poster = SmartPoster.from(msg.getRecords()[0]);
- assertEquals("NFC Forum Type 4 Tag", poster.getTitle());
- assertEquals("http://www.nxp.com/nfc", poster.getUri().toString());
+ SmartPoster poster = SmartPoster.parse(msg.getRecords()[0]);
+ assertEquals("NFC Forum Type 4 Tag", poster.getTitle().getText());
+ assertEquals("http://www.nxp.com/nfc", poster.getUriRecord().getUri().toString());
}
}
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