I created an app on Android Studios using my Samsung S4 mini and then transferred the app onto my much newer Samsung A7, which worked fine.
However, I decided to update Android Studios and since then, while it still works fine installed directly from Android Studios, after I transfer the app to my A7, it won't install- it seems to mostly install and then stops at the end with a 'did not install' message.
Thinking it was a problem with my project, I created a new project and tried the same thing with it as is, but with the same result. I checked my permissions and the transfer app I'm using has permission to install apps. I tried using a different transfer app, but still the same. I even uninstalled the app on the Samsung S4 (where it was working because I directly installed it from Android Studio) and then transferred the file from my A7 to my S4 and it wouldn't install on the S4 either.
Does anyone have any ideas what the problem might be?