private void readTag(Tag t) {
// get NDEF tag details
Ndef ndefTag = Ndef.get(t);
// get NDEF message details
NdefMessage ndefMesg = ndefTag.getCachedNdefMessage();
if (ndefMesg == null) {
return;
}
NdefRecord[] ndefRecords = ndefMesg.getRecords();
if (ndefRecords == null) {
return;
}
for (NdefRecord record : ndefRecords) {
short tnf = record.getTnf();
String type = new String(record.getType());
if (tnf == NdefRecord.TNF_WELL_KNOWN && Arrays.equals(type.getBytes(), NdefRecord.RTD_URI)) {
String url = new String(record.getPayload());
if (url.startsWith(ATTENDEE_URL_PREFIX)) {
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse("https://" + url.substring(1)));
startActivity(i);
return;
}
}
}
}
@Override
protected String doInBackground(Tag... params) {
Tag tag = params[0];
Ndef ndef = Ndef.get(tag);
if (ndef == null) {
// NDEF is not supported by this Tag.
return null;
}
NdefMessage ndefMessage = ndef.getCachedNdefMessage();
NdefRecord[] records = ndefMessage.getRecords();
for (NdefRecord ndefRecord : records) {
if (ndefRecord.getTnf() == NdefRecord.TNF_WELL_KNOWN
&& Arrays.equals(ndefRecord.getType(), NdefRecord.RTD_TEXT)) {
try {
return readText(ndefRecord);
} catch (UnsupportedEncodingException e) {
Log.e(TAG, "Unsupported Encoding", e);
}
}
}
return null;
}
/** Parse an well known URI record */
private static UriRecord parseWellKnown(NdefRecord record) {
Preconditions.checkArgument(Arrays.equals(record.getType(), NdefRecord.RTD_URI));
byte[] payload = record.getPayload();
String prefix = URI_PREFIX_MAP.get(payload[0]);
byte[] fullUri =
Bytes.concat(
prefix.getBytes(Charset.forName("UTF-8")),
Arrays.copyOfRange(payload, 1, payload.length));
Uri uri = Uri.parse(new String(fullUri, Charset.forName("UTF-8")));
return new UriRecord(uri);
}
private ScanableTag messageToScanable(NdefMessage message) {
NdefRecord record = message.getRecords()[0];
// XXX Ignoring the first byte because it contains a flag we are not
// paying attention to yet
byte[] rawData = new byte[record.getPayload().length - 1];
System.arraycopy(record.getPayload(), 1, rawData, 0, rawData.length);
String text = decodePayload(rawData);
String mimeType = decodePayload(record.getType());
return new TagParser().parse(mimeType, text);
}
@Override
public boolean supportsRequest(NdefRecord handoverRequest) {
if (handoverRequest.getTnf() != NdefRecord.TNF_ABSOLUTE_URI
|| !Arrays.equals(handoverRequest.getType(), NdefRecord.RTD_URI)) {
return false;
}
String uriString = new String(handoverRequest.getPayload());
if (uriString.startsWith(BT_SOCKET_SCHEMA)) {
return true;
}
return false;
}
/**
* Checks to see if the activity's intent ({@link android.app.Activity#getIntent()}) is an NFC
* intent that the app recognizes. If it is, then parse the NFC message and set the activity's
* intent (using {@link android.app.Activity#setIntent(android.content.Intent)}) to something the
* app can recognize (i.e. a normal {@link android.content.Intent#ACTION_VIEW} intent).
*/
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
public static void tryUpdateIntentFromBeam(Activity activity) {
if (UIUtils.hasICS()) {
Intent originalIntent = activity.getIntent();
if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(originalIntent.getAction())) {
Parcelable[] rawMsgs =
originalIntent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
NdefMessage msg = (NdefMessage) rawMsgs[0];
// Record 0 contains the MIME type, record 1 is the AAR, if present.
// In iosched, AARs are not present.
NdefRecord mimeRecord = msg.getRecords()[0];
if (ScheduleContract.Sessions.CONTENT_ITEM_TYPE.equals(new String(mimeRecord.getType()))) {
// Re-set the activity's intent to one that represents session details.
Intent sessionDetailIntent =
new Intent(Intent.ACTION_VIEW, Uri.parse(new String(mimeRecord.getPayload())));
activity.setIntent(sessionDetailIntent);
}
}
}
}
@Override
protected void onResume() {
super.onResume();
Intent intent = getIntent();
String action = intent.getAction();
if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(action)) {
Parcelable[] rawMsgs = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
if (rawMsgs != null) {
NdefMessage[] msgs = new NdefMessage[rawMsgs.length];
for (int i = 0; i < rawMsgs.length; i++) {
msgs[i] = (NdefMessage) rawMsgs[i];
for (NdefRecord record : msgs[i].getRecords()) {
String type = new String(record.getType());
byte[] payload = record.getPayload();
if (PROFILE_MIME_TYPE.equals(type) && payload != null && payload.length == 16) {
handleProfileMimeType(payload);
}
}
}
}
}
finish();
}
