[tripathiankush (OP)]

Which languages I need to learn to become android developer?Anyone knows about android online training course?
please reply..
Thanks in advance..!!

[nicephotog]

Basically it is Linux, but there is a large app development section that uses Java2 rather than the Linux Android c/c++  Kernel.

[JhonEvance]

I would advise starting with Java. Also useful would be Kotlin, C / C ++.

[Eaceay]

I am learning C / C ++.

[EliseJobDiva]

I think it'll be good for learning C/C ++

[nicephotog]

If you want to develop "apps" Java and Kotlin, with a good understanding of XML for the app configuration and layout files.
While android is Java for app dev, it has its own Android API. Apps layout are controlled by CSS in html , a kind of Android version 'tis to JSF UI element classes.
Essentially the computing kernel OS is Linux, so C/C++ service daemons underpinning it.

NB Java itself is written in C/C++ not assembly.