Hallo Zhihong,
> [...] I write the tag by Ndef class, but the tag can't be read by any
> readers application, it cause them crash.
> [...]
> NdefRecord record = new NdefRecord(
> NdefRecord.TNF_WELL_KNOWN,
> NdefRecord.RTD_TEXT,
> new byte[0],
> "this is a write tag".getBytes()
> );
Right, looking at the above statement you try to write an NDEF Text
record. Unfortunately, your payload data ("this is a write
tag".getBytes()) is simply wrong. You should have a look at the NFC
Forum's NDEF Text Record Type Definition specification[]. A text
record's payload looks like this:
+-------------+---------------+--------------------------------+
| Header Byte | Language Code | Text |
+-------------+---------------+--------------------------------+
So the payload starts with a header byte that defines the text encoding
and the length of the language code. It is followed by a language code
and the actual text field.
[] http://www.nfc-forum.org/specs/spec_list/#text_rtd
br,
Michael
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