You must find or build an OTG adapter that is able to power the phone in the same time as providing USB host features. At the end is just a matter of a resistor with a specific value, that can vary from phone to phone.
I don't know yet when I will be able to release first version of dAReC (this is the name of the Android version of jAReC), as I have currently some other projects in the final development stage and with a higher priority.
73 Dan YO3GGX
Here we will discuss any subject related to the Android Pocket Transceiver which is available for free download in Google Play Store