Nfc Host Card Emulation(hce)

I'm actually trying to emulate a NFC card with my android smartphone(on 4.4) and send this information to my NFC reader witch is connected to my Java Application. The goal is to ca

Solution 1:

Peer-to-peer mode and Android HCE are two different things. In order to access devices with Android HCE, your reader only needs to support contactless smartcards (i.e. ISO 14443-4 + ISO 7816-4). If your reader is connected to your Java application using the Java SmartcardIO API this is likely the case.

Regarding a unique identifier: With Android HCE, the serial number used during the anti-collision sequence of the ISO 14443 protocol (e.g. UID, PUPI) is random (typically a new value for each protocol activation). So the only way to get a unique identifier over Android HCE would be to define such an identifier within your HCE application and to query your application for this ID using a custom ISO 7816-4 command(-sequence).