android通过NFC读写数据
/*
* Writes an NdefMessage to a NFC tag
*/
public static 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()) {
return false;
}
if (ndef.getMaxSize() < size) {
return false;
}
ndef.writeNdefMessage(message);
return true;
} else {
NdefFormatable format = NdefFormatable.get(tag);
if (format != null) {
try {
format.connect();
format.format(message);
return true;
} catch (IOException e) {
return false;
}
} else {
return false;
}
}
} catch (Exception e) {
return false;
}
}