问题
When I create a new project with a Blank Activity in Android Studio, it uses a RelativeLayout by default. I'd like to change that Blank Activity default to LinearLayout, rather than editing each activity - is that possible?
回答1:
I have already answered this question here: How to change a default template files in Android Studio.
Basically you need to look at the recipe_fragment.xml.ftl file, so you, know which files are used for the template.
The default template files are located in:
...\Android\Android Studio\plugins\android\lib\templates\activities
So according to the recipe for the BlankActivity template, it says that it uses ../common/recipe_simple.xml.ftl (if you dont't want to use a fragment layout) according to that recipe, it says that is uses this file to build the BlankActivity:
...\Android\Android Studio\plugins\android\lib\templates\activities\common\root\res\layout\simple.xml.ftl
by simply replacing RelativeLayout with LinearLayout in your favourite text editor (move the file to the Desktop and edit it over there), you get what you want, but instead of that, I recommend you to make your own template, where you can define literally anything.
来源：https://stackoverflow.com/questions/34404428/can-i-change-the-default-layout-in-android-studio