To develop the android app which language is preferable?

Answer 1

Java 🍵

Answer 2

Java is probably the most used, but if you check out VS 2017 the support they added for mobile development in c# and c++ is pretty amazing

Answer 3

Java ☕

Answer 4

for cross platform Android applications it's better to go with c++ or c# or use Java.

Answer 5

Java.
I would definitely not use C as the app would be broken very quickly by naughty developers!