Currently I\'m using Android Studio 2.0 and installing my APK into my Samsung device (S6). However, when rebuilding my code and running it again I receive the following erro
I am having the same issue. My "fix" was to uninstall the app each time before installing it through Android Studio.
What I think is that if your app is running already, Android Studio is unable to rewrite the "updated" build on top of that. So, either you manually stop the app or add this to Gradle to fix the issue.
I know it's just a workaround and I'd love to get a legitimate fix for this.