I have made a android game in unreal engine 4 version 4.12.4 and I want to test it on a real android device and i do have an android tablet but i don't know how to get the exported project onto the tablet for testing so can someone tell me please?
Pressuming you have the android sdk installed:
Put your phone into developer mode plug it into the computer, and enable adb
Open command prompt and navigate to the adb folder inside the sdk
after this type:
adb install apkname.apk
or the other way enable allow installs from unkown sources put the apk on your phone navigate to it and then open it and install it that way but the first option is easy enough to make an install script for when you update it.
Hope this helps