Q:

Values folders for specific android versions

I'm just starting to get into material design for android and I ran into small problem - material design guide says to create separate values-v21 folder and create my custom theme there, while all older versions will fall back to default values folder. By the time tutorial was released 21 Android version was the latest, so do I need separate folders for each subsequent android versions (22,23..) now and just copy same theme? Or will all later version will fall back to v21 theme if there's no newer version values folder?

A:

No. Only create a /values/ and a /values-v21/ folder for your styles. This will be used by Android 5 and below and Android 6 and above.
If both folders exist with proper Styles.xml files, then Android 6 devices will use values-v21 and Android 5 and below devices will use values

