private boolean writeToTag(NdefMessage message, NdefMessage messageWithoutPhoto, Ndef ndef)
throws IOException, FormatException {
int size = message.toByteArray().length;
int sizeSmall = messageWithoutPhoto.toByteArray().length;
ndef.connect();
if (!ndef.isWritable()) {
toast("Tag is read-only.");
return false;
}
NdefMessage messageToWrite = message;
if (ndef.getMaxSize() < size) {
if (ndef.getMaxSize() < sizeSmall) {
toast(getResources().getString(R.string.write_tag_failed_size, ndef.getMaxSize(), size));
return false;
} else {
messageToWrite = messageWithoutPhoto;
}
}
ndef.writeNdefMessage(messageToWrite);
return true;
}
public static NdefRecord[] readRecords(Tag tag)
throws IOException, FormatException, NotReadableException {
Ndef ndefTag = Ndef.get(tag);
if (ndefTag == null) {
throw new NotReadableException("The tag doesn't support Ndef tech");
}
ndefTag.connect();
NdefMessage message = ndefTag.getNdefMessage();
NdefRecord[] records = message.getRecords();
ndefTag.close();
return records;
}
private void write(String text, Tag tag) throws IOException, FormatException {
NdefRecord[] records = {createWellKnownRecord(text)};
NdefMessage message = new NdefMessage(records);
// Get an instance of Ndef for the tag.
Ndef ndef = Ndef.get(tag);
// Enable I/O
ndef.connect();
// Write the message
ndef.writeNdefMessage(message);
// Close the connection
ndef.close();
}
/** Metoda zapisujaca w tle wiadomosc do tagu NFC Przed sprawdzeniem formatuje tag */
@Override
protected Void doInBackground(Void... nop) {
int size = this.msg.toByteArray().length;
try {
Ndef ndef = Ndef.get(this.tag);
if (ndef == null) {
NdefFormatable formatable = NdefFormatable.get(this.tag);
if (formatable != null) {
try {
formatable.connect();
try {
formatable.format(this.msg);
} catch (Exception e) {
this.returnText = R.string.nfc_tag_refused_to_format;
}
} catch (Exception e) {
this.returnText = R.string.nfc_tag_refused_to_connect;
} finally {
formatable.close();
}
} else {
this.returnText = R.string.nfc_tag_does_not_support_ndef;
}
} else {
ndef.connect();
try {
if (!ndef.isWritable()) {
this.returnText = R.string.nfc_tag_is_read_only;
} else if (ndef.getMaxSize() < size) {
this.returnText = R.string.nfc_message_is_too_big;
} else {
ndef.writeNdefMessage(this.msg);
this.returnText = R.string.nfc_tag_saved;
this.returnStatus = Activity.RESULT_OK;
}
} catch (Exception e) {
this.returnText = R.string.nfc_tag_refused_to_connect;
} finally {
ndef.close();
}
}
} catch (Exception e) {
Log.e(TAG, "Exception when writing tag", e);
this.returnText = R.string.nfc_general_exception;
}
return (null);
}
public boolean writeNdefMessageToTag(NdefMessage message, Tag detectedTag) {
int size = message.toByteArray().length;
try {
Ndef ndef = Ndef.get(detectedTag);
if (ndef != null) {
ndef.connect();
if (!ndef.isWritable()) {
Toast.makeText(this, "Tag is read-only.", Toast.LENGTH_SHORT).show();
return false;
}
if (ndef.getMaxSize() < size) {
Toast.makeText(
this,
"The data cannot written to tag,Tag capacity is "
+ ndef.getMaxSize()
+ " bytes, message is "
+ size
+ " bytes.",
Toast.LENGTH_SHORT)
.show();
return false;
}
ndef.writeNdefMessage(message);
ndef.close();
Toast.makeText(this, "Message is written tag.", Toast.LENGTH_SHORT).show();
return true;
} else {
NdefFormatable ndefFormat = NdefFormatable.get(detectedTag);
if (ndefFormat != null) {
try {
ndefFormat.connect();
ndefFormat.format(message);
ndefFormat.close();
Toast.makeText(this, "The data is written to the tag ", Toast.LENGTH_SHORT).show();
return true;
} catch (IOException e) {
Toast.makeText(this, "Failed to format tag", Toast.LENGTH_SHORT).show();
return false;
}
} else {
Toast.makeText(this, "NDEF is not supported", Toast.LENGTH_SHORT).show();
return false;
}
}
} catch (Exception e) {
Toast.makeText(this, "Write opreation is failed", Toast.LENGTH_SHORT).show();
}
return false;
}
public void writeTag(NdefMessage message, Tag tag) {
int size = message.toByteArray().length;
String mess;
try {
Ndef ndef = Ndef.get(tag);
if (ndef != null) {
ndef.connect();
if (!ndef.isWritable()) {
this.status = 0;
this.message = "Tag is read-only";
}
if (ndef.getMaxSize() < size) {
mess = "Tag capacity is " + ndef.getMaxSize() + " bytes, message is " + size + " bytes.";
this.status = 0;
this.message = mess;
}
ndef.writeNdefMessage(message);
if (writeProtect) ndef.makeReadOnly();
mess = "Wrote message to pre-formatted tag.";
this.status = 1;
this.message = mess;
} else {
NdefFormatable format = NdefFormatable.get(tag);
if (format != null) {
try {
format.connect();
format.format(message);
mess = "Formatted tag and wrote message";
this.status = 1;
this.message = mess;
} catch (IOException e) {
mess = "Failed to format tag.";
this.status = 0;
this.message = mess;
}
} else {
mess = "Tag doesn't support NDEF.";
this.status = 0;
this.message = mess;
}
}
} catch (Exception e) {
mess = "Failed to write tag";
this.status = 0;
this.message = mess;
}
}
public static String[] readStrings(Tag tag)
throws IOException, FormatException, NotReadableException {
Ndef ndefTag = Ndef.get(tag);
if (ndefTag == null) {
throw new NotReadableException("The tag doesn't support Ndef tech");
}
ndefTag.connect();
NdefMessage message = ndefTag.getNdefMessage();
NdefRecord[] records = message.getRecords();
String[] out = new String[records.length];
int i = 0;
for (NdefRecord rec : records) {
out[i++] = new String(rec.getPayload(), Charset.forName("UTF-8"));
}
ndefTag.close();
return out;
}
/**
* タグ書き込みを行う
*
* @param message
* @param tag
* @return
*/
boolean writeTag(NdefMessage message, Tag tag) {
int size = message.toByteArray().length;
try {
Ndef ndef = Ndef.get(tag);
if (ndef != null) {
ndef.connect();
if (!ndef.isWritable()) {
toast("Tag is read-only.");
return false;
}
if (ndef.getMaxSize() < size) {
toast("Tag capacity is " + ndef.getMaxSize() + " bytes, message is " + size + " bytes.");
return false;
}
ndef.writeNdefMessage(message);
mVib.vibrate(300);
toast("Wrote message to pre-formatted tag.");
return true;
} else {
NdefFormatable format = NdefFormatable.get(tag);
if (format != null) {
try {
format.connect();
format.format(message);
mVib.vibrate(300);
toast("Formatted tag and wrote message");
return true;
} catch (IOException e) {
toast("Failed to format tag.");
return false;
}
} else {
toast("Tag doesn't support NDEF.");
return false;
}
}
} catch (Exception e) {
e.printStackTrace();
toast("Failed to write tag");
}
return false;
}
public boolean writableTag(Tag tag, Context context) {
try {
Ndef ndef = Ndef.get(tag);
if (ndef != null) {
ndef.connect();
if (!ndef.isWritable()) {
Toast.makeText(context, "Tag is read-only.", Toast.LENGTH_SHORT).show();
ndef.close();
return false;
}
ndef.close();
return true;
}
} catch (Exception e) {
Toast.makeText(context, "Failed to read tag", Toast.LENGTH_SHORT).show();
}
return false;
}
// El método write es el más importante, será el que se encargue de crear el mensaje
// y escribirlo en nuestro tag.
private void write(String text, Tag tag) throws IOException, FormatException {
try {
// Creamos un array de elementos NdefRecord. Este Objeto representa un registro del mensaje
// NDEF
// Para crear el objeto NdefRecord usamos el método createRecord(String s)
NdefRecord[] records = {createRecord(text)};
// NdefMessage encapsula un mensaje Ndef(NFC Data Exchange Format). Estos mensajes están
// compuestos por varios registros encapsulados por la clase NdefRecord
NdefMessage message = new NdefMessage(records);
// Obtenemos una instancia de Ndef del Tag
Ndef ndef = Ndef.get(tag);
ndef.connect();
ndef.writeNdefMessage(message);
ndef.close();
} catch (Exception e) {
Log.d("WRITE", "Excepción: " + e.getMessage());
}
} // write
private boolean writeTxtToTag(String textToWrite, Tag tag) throws IOException, FormatException {
if (tag == null) {
Log.d(TAG, "writeTxtToTag: tag is null!");
Toast.makeText(this, "Tag is null", Toast.LENGTH_SHORT).show();
return false;
}
NdefRecord record = createRecord(textToWrite);
if (record == null) {
Log.d(TAG, "writeTxtToTag: record is null!");
return false;
} else {
NdefRecord[] records = {record};
NdefMessage message = new NdefMessage(records);
Ndef ndef = Ndef.get(tag);
ndef.connect();
ndef.writeNdefMessage(message);
ndef.close();
}
return true;
}
public void writeTag(NdefMessage ndefMessage, Tag tag) {
try {
Ndef ndef = Ndef.get(tag);
if (ndef != null) {
ndef.connect();
ndef.writeNdefMessage(ndefMessage);
} else {
NdefFormatable format = NdefFormatable.get(tag);
if (format != null) {
try {
format.connect();
format.format(ndefMessage);
} catch (IOException e) {
Log.e(Constants.LOGTAG, e.getMessage(), e);
}
}
}
} catch (Exception e) {
Log.e(Constants.LOGTAG, e.getMessage(), e);
}
}
/** Actually writes data into tag (sticker). */
private void writeTag(NdefMessage message, Tag tag) {
int size = message.toByteArray().length;
try {
Ndef ndef = Ndef.get(tag);
if (ndef != null) {
ndef.connect();
if (!ndef.isWritable()) {
toast(R.string.tag_read_only);
return;
}
if (ndef.getMaxSize() < size) {
toast(R.string.exceeded_tag_capacity);
return;
}
ndef.writeNdefMessage(message);
toast(R.string.sticker_write_success);
} else {
NdefFormatable format = NdefFormatable.get(tag);
if (format != null) {
try {
format.connect();
format.format(message);
toast(R.string.sticker_write_success);
} catch (IOException e) {
toast(R.string.sticker_write_error);
}
} else {
toast(R.string.sticker_write_error);
}
}
} catch (FormatException e) {
toast(R.string.sticker_write_error);
} catch (IOException e) {
toast(R.string.sticker_write_error);
}
}
boolean writeTag(NdefMessage message, Tag tag) {
int size = message.toByteArray().length;
try {
Ndef ndef = Ndef.get(tag);
if (ndef != null) {
ndef.connect();
if (!ndef.isWritable()) {
Toast.makeText(
this, "Cannot write to this tag. This tag is read-only.", Toast.LENGTH_LONG)
.show();
return false;
}
if (ndef.getMaxSize() < size) {
Toast.makeText(
this,
"Cannot write to this tag. Message size ("
+ size
+ " bytes) exceeds this tag's capacity of "
+ ndef.getMaxSize()
+ " bytes.",
Toast.LENGTH_LONG)
.show();
return false;
}
ndef.writeNdefMessage(message);
Toast.makeText(this, "A pre-formatted tag was successfully updated.", Toast.LENGTH_LONG)
.show();
return true;
} else {
NdefFormatable format = NdefFormatable.get(tag);
if (format != null) {
try {
format.connect();
format.format(message);
Toast.makeText(
this, "This tag was successfully formatted and updated.", Toast.LENGTH_LONG)
.show();
return true;
} catch (IOException e) {
Toast.makeText(
this, "Cannot write to this tag due to I/O Exception.", Toast.LENGTH_LONG)
.show();
return false;
}
} else {
Toast.makeText(
this,
"Cannot write to this tag. This tag does not support NDEF.",
Toast.LENGTH_LONG)
.show();
return false;
}
}
} catch (Exception e) {
Toast.makeText(this, "Cannot write to this tag due to an Exception.", Toast.LENGTH_LONG)
.show();
}
return false;
}
