Here is the learning roadmap of Block chain for Mobile Developers
Theory and concepts
https://www.youtube.com/playlist?list=PLsyeobzWxl7oY6tZmnZ5S7yTDxyu4zDW-
Ethereum
https://ethereum.org/en/
https://youtu.be/itUrxH-rksc
HyperLedger
https://besu.hyperledger.org/en/stable/HowTo/Configure/FreeGas/
Solidity
https://soliditylang.org
https://youtu.be/ipwxYa-F1uY
HyperLedger
https://www.youtube.com/watch?v=iTV89Tqfmgk
Practicle Project
Build Block chain in 15 mins
https://youtu.be/baJYhYsHkLM(For Android & Java)
https://boemo1mmopelwa.medium.com/implementing-etherium-blockchain-in-android-with-web3j-485ea0747088
https://medium.com/@pacs_IT/an-ethereum-api-for-android-app-developers-revision-and-whats-to-come-eb5488fc3adb
(For Flutter)
https://techblog.geekyants.com/developing-blockchain-applications-with-flutter
https://www.geeksforgeeks.org/flutter-and-blockchain-hello-world-dapp
https://www.youtube.com/watch?v=3Eeh3pJ6PeA
https://www.youtube.com/playlist?list=PLVL9I5xQTSjEXxmjUC-RjQq-yCGZfp9GF
My Done Projects
https://github.com/Rubywai/flutter_ethereum_blockchain