Are there ready-made styles for Android applications?

Question

Android

I'll draw some analogy
When I developed websites, I used ready-made styles (css) and js scripts
Now I'm developing android applications in eclipse and I just can't find ready-made styles that would be supplemented with scripts.
On the Internet, no matter how much I rummaged, I found nothing but bootstrap, but I would like something else.
found some psd pictures and programs for exporting psd to xml
Example HERE
Help me understand everything
Where can I find ready-made styles?

Answer 1

When developing under Andoid native tools (Android Studio, Eclipse + ADT), you choose the version of Android for which you are building the application.
Depending on the selected version, a number of design themes becomes available to you, which is replenished as it evolves. For earlier versions, the list is smaller, but can be expanded with Google's support libraries.
And only then the selected theme can be "polished" with xml-styles and your own design elements.
Naturally, Google highly recommends using the default themes for a consistent user experience.

Answer 2

jQuery Mobile: ThemeRoller