You can do that with Bluetooth. And since Android 4.0, you can use NFC to automatically pair two phones, and then share between them through Bluetooth. It's cal

You can do that with Bluetooth. And since Android 4.0, you can use NFC to automatically pair two phones, and then share between them through Bluetooth. It's called "Android Beam". Samsung modified this technology to work with Wi-Fi, too, and I think you could already do that before with "Wi-Fi Direct", you just had to pair them manually. I haven't looked into 3rd party apps, but I imagine they could use the same protocols as Firechat for file sharing. But I think on Android it would only work through Bluetooth anyway. Google needs to mandate all OEMs to use Wi-Fi Direct otherwise.