Which programming languages are more useful for creating android applications?

Question

Java, C+++ ,C## ,CSS

Answer 1

Minimum of Java and/or Kotlin, XML.

C++, C for use with NDK.

C# for platforms such as Unity.

SQL and a RDBMS such as MySQL for working with databases.

Javascript, jQuery, HTML if interacting with a websites DOM without an API.

Answer 2

Java