I am working on an Android 4.0 application using NFC on my Samsung Nexus S and I would need to modify some advance settings: the time of the NFC field pulse especially.
I developed my first applications and they work fine with most of the NFC tags but I need to use some special tags which need much more time to make calculations and the NFC field pulse is too short: my tag will consistently be stopped (power cut down by the phone every ~0.1 or 0.05 sec).
I am very new in Android development but I have heard about the Native Development Kit (NDK) which provides “more advanced” tools to deal with low-level operations. I also heard it was often mystified by Android programmers as the magic solution for any problem.
Do you think NDK provides more flexibility regarding NFC programming? Could it help me with my task?
I thank you in advance,
Regards
Your tag problem may be due to the fact that the NFC stack checks for an NFC Forum NDEF message (Type 4 Tag in this case, I am guessing) and the tag takes too long to answer (it is likely sending Waiting Time Extension requests). The connection to the tag is then simply broken off and the NFC stack continues polling for new tags. You cannot influence this behaviour without changing and recompiling parts of the Android OS, so use of the NDK will, in all likelihood, not help in solving your problem.