Answer 1

Hi! Learn Java and Android studio

For mobile development:

Prerequisites :
- Advanced knowledge in Java programming language
- Basic knowledge in XML
- Basic knowledge in Android studio

I think that's all, then download Android Studio and start writing your app

https://code.sololearn.com/Wc0mkR5TeMKV/?ref=app

https://code.sololearn.com/W7fkt695n2vd/?ref=app

https://code.sololearn.com/W15402p78Rio/?ref=app

https://code.sololearn.com/W049XB43HrqG/?ref=app