When I create a new project with API14 as minimum, then there is no values-21 or values-22 folder in my project. I don't see any styles.XML anywhere, so how should I put in XML code for just Lollipop?
I use Android Studio 1.0.1, and I have SDK 21, 21.1.1, 24.0.2 installed.
Updated: Since API 22 has been released. API 23 is the same idea.
Right click the RES folder
Then type values-v22 as the directory name and choose xml as the resource type.
If you do NOT see the values-v22 show up, click the Project pulldown at the top of the screen like so. e.g. Change from Android to Project
Now right click styles.xml in the values folder and choose copy
Now right click the values-v22 folder and click paste.
You should see this popup
Click ok
At this point you should be good to go.
It is just a bug! Anyway I find a way to get it back:
Write anything in styles.xml that is related to new material theme example:
<item name="android:colorPrimary">@color/colorPrimary</item>It will show you an error hover over it and press Alt+Enter.
choose the first choice Override Resource in values-v21.
I know it isn't the best way to do that, but it works until anyone can find a better way.
Try to switch from Android to [![Project][1]][1] as shown below
来源：https://stackoverflow.com/questions/27553431/values-21-values-22-or-values-xx-folder-is-gone-after-android-studio-1-0