How to develop android app

Question

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Answer 1

You can also have a look at this
https://www.sololearn.com/learn/1439

Answer 2

First, you have to learn how to use Google.
http://lmgtfy.com/?q=develop+app+android+studio
😉

Answer 3

Refer this ebook if you have patience to read 1000+ pages
https://books.goalkicker.com/AndroidBook/