How do you style an android app?

Question

I've been doing web development for some time, and now I want do learn android. I know java and that is fine. What interests me is how do I style my app. For example if I would like to put some border on my button, or add a shadow. If it was an web site I would use css, but what do I use in android ?

I'm talking about native android apps, and I would not like to use a framework like ionic or someting similar.

Answer 1

Android has own styles system thought properties. It's a little similar with css.

<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="#00FF00"
android:typeface="monospace"
android:text="@string/hello" />

You can read more in official documentation