Is there any way to fix APP not installed?

Question

When I build signed APK it\'s installing without any problem, but when I uninstall it and trying to install it again it\'s says App not installed:

&l         


        

Answer 1

Did you install a copy of your app in your device via Android Studio (via Run) before?

If Yes, then you must've also uinstalled it before pushing the signed version but apps installed via ADB (A.S) aren't uinstalled completely...

Go to Settings > Apps & Notifications > Find your App > Click on the 3 dots on Toolbar > Uninstall for All Users...

Now try installing your App