Tutorial Construct 2 how to export to Android Project then open the project files using Android Studio to build a debug APK or build a release APK.
Warning: You must own valid Construct 2 license, if you are using Construct 2 Free edition you are no allowed export games to Android, iOS and Windows.
When you build release APK in Android Studio you need to choose APK Signature version, choose v1 and v2 if available. More detail about APK Signature Scheme you can found here:
https://source.android.com/security/apksigning/v2.html#verification
Construct 2 is a powerful game engine also very intuitive drag and drop for creating 2D games, make a game without coding but still need knowledge about programming. Easy user interface, to creating 2D games and support export to multi-platform (Android, HTML5, Windows, macOS, Linux, iOS).