从Android附加NFC标签

Question

I would like to know how to append some text to an NFC tag on Android. I know that writeNdefMessage can overwrite the the whole message on the tag but I did not find any method to append data to it. However, I would prefer to append it.

Answer 1

If you want to stick to high-level (tag platform independent) access to NFC tags through the Ndef class, then you can only overwrite the whole NDEF message using writeNdefMessage() .

Android also permits you to directly send low-level commands to NFC tags (eg to issue a read/write command). You could use such commands to append data to a free memory area on the tag. However, how you would do this heavily depends to the tag platform that you use.