I also had many problems trying to cook and install a simple app on android targeting Api 15 and this was the only thing that make it work for me:
- I have started with a fresh install of UE4.15
- Then installing CodeWorksforAndroid-1R5-windows.exe
- (my FIX) Make sure to select also SDK api level 19 (and other you need)
- Then on Platforms-Android SDK settins everying like the image from @Samantha_Sutton except replaced “latest” for “android-19”
- Delete all the cache files from your project and reconfigure your Android app settings. I set desired Target SDK as 15.
- Build
And finally is working for me running the App on android phone.