I have written an android app, and installed onto an Api25 phone (debug build) via Android Studio. Now I have been forced to get a new device while away from home.
I would like to copy the app from my old to new device, while not having access to my computer or source code.
I have been able to grab the APK which is unsigned (or signed with development debug keys) However upon install on the new device "the package appears to be invalid"
Neither device has root. How can I resign this apk without a computer (device only). This is a personal app I use for work so package names etc are of no concern.