I'm working on an Android application where I need to use the antenna of Android phones to detect some kind of signal. Is there a way to detect any kind of wireless signal using Android's antenna and identify it? Or must the signal be some sort of pre-defined one like Wi-fi?
Thanks!
You cannot receive arbitrary signals of arbitrary frequencies from the stock Android SDK. You could conceivably build an Android-powered software-defined radio, but that would require modifications to the firmware and probably the hardware.