Which language it is good for write andriod app?

Answer 1

U can try web 👇
https://www.sololearn.com/learn/1439/?ref=app

Answer 2

Java and Kotlin are official languages for Android development.
https://developer.android.com/guide/components/fundamentals
https://developer.android.com/training/basics/firstapp/

Though Android apps can be written in other languages too.
https://www.androidauthority.com/develop-android-apps-languages-learn-391008/

Useful threads:
https://www.sololearn.com/discuss/823823/?ref=app
https://www.sololearn.com/discuss/823843/?ref=app

BTW, this question has been asked and answered before, please use the search bar next time😊