I want to learn android app development.But i have no idea?

Answer 1

Any tech stack can develop mobile app.

Current trend is Flutter VS ReactNative, both are for cross platform mobile app with one code base.

Answer 2

For Android development you need to learn Java programming language.

Best Android development courses:
https://medium.com/@tristaljing/10-best-app-development-courses-for-beginners-and-get-a-job-d84dbf34b101

If you are familiar with Java then you should learn Kotlin programming language.

For Kotlin:
https://hackernoon.com/top-5-kotlin-programming-courses-for-java-and-android-programmers-49e842b8af1a

For cross platform (for both IOS and Android) you should have to learn Flutter or ReactNative.

Answer 3

Search on youtube before asking you can find better result

Answer 4

Start with Android development and download Android studio to practice