How to change default template layout files in Android Studio

Question

As you know every time you create new project with some activity, Android Studio generates a default activity_main.xml file with RelativeLayout as the root element and one T

Answer 1

in our course, we hacked the default activity. It worked as expected, still a side effect occured while upgrading from Android Studio 3 to 3.1. The installation wizard detected the default activity template was modified and we had to replace our hacked version with a stock one.

So I suggest creating your own templates in the way Android Studio expects it (ie, through the template options) for a smooth upgrade process.