Good resources to learn about Android
Development Material
https://codelabs.developers.google.com/codelabs/material-design-style/index.html?index=..%2F..%2Findex#0
Testing
https://codelabs.developers.google.com/codelabs/android-testing/index.html#0
Firebase
https://codelabs.developers.google.com/codelabs/firebase-android/#5
Open Source apps (read code)
https://techbeacon.com/how-master-android-what-developers-can-learn-21-apps
Best icon generator
https://romannurik.github.io/AndroidAssetStudio/
