I need to read RFID tag and use it as a bar-code system. How to read RFID by using an Android device? Please guide me.
This topic is too big to be addressed here. Here is a presentation that can get you started.
NFC is a type of RFID and I think that is what you actually want to know about. Since some Android devices support NFC .
I was also going through the R&D process that how to read RFID tags on Android, So I found some useful links which describes how exactly it works.
For basics understanding go here & for demo Application it has very good explanation
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