This is what libraries in Android Studio are for. They simply extend the capabilities of Java/Kotlin/the Android SDK by letting you use classes and methods built by other users.

Kotlin offers big advantages over Java for JVM and Android development, and plays nicely with Java in the same projects.

If you want to learn the Kotlin programming language, check out this list of books, courses, tutorials, videos and websites.

Google I/O: Kotlin, a popular new language for mobile platforms that's compatible with Java, is now officially supported on Android.