/** 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;
}
