What's the framework for an app,how to learn about it and what are its prerequisites??!

Answer 1

An app can be created via many different means, from HTML to C# to Java to Python to etc..... So it depends what type of app you're trying to create and what tool would be best utilized for it. As for how you learn about it, that'll be the same as with anything else; track down resources, read them and then practice. Read what you can here and Google the rest as you go along.

My personal choice for Android programming is Java, but it certainly isn't the only choice to pick from.

Java: https://www.sololearn.com/learning/1068
Kotlin: https://www.sololearn.com/learning/1160
C#: https://www.sololearn.com/learning/1080
Python: https://www.sololearn.com/learning/1073
SQL: https://www.sololearn.com/learning/1060

^Good places to get started.