If you haven't read my intro post, I mentioned how I want to share what free resources I utilize as a junior android developer in training. I know that everyone has different learning styles, which is why I intentionally included different types of resources. Just a note, *means I personally have not used it, but know other android developers who strongly advocate for it.

General Computer Science

• BaseCS, also as a podcast* and video*
• CS50*
• Github's learn git

Android Development

Goal kicker books

• Kotlin
• Android
• Java

Learn by doing

• Google's Codelabs
• Jetbrains Kotlin Track

Documentation

• Kotlin
• Android - if you search a topic through a search engine, chances are you'll get the deprecated page because of the migration AndroidX. To find the most updated page, I'd recommend searching within the website itself.

Blogs

• Roman Elizarov's blog - he's the team lead for kotlin libraries & has conference talks that help explain topics well
• AndroidDev - I'd also recommend signing up for their Now In Android newsletter, where they share the newest resources, topics, best practices, etc every month

Online Courses

• Developing Android Apps with Kotlin*

Conferences Talks

• Android Dev Summit
• DevFest* - you can filter the product and topic to Android
• Droidcon*

Beginner topics

Here's a list of concepts I've been focusing on as an new android developer. Just a note, some might not apply to others based on what their focusing on (ex. I study exoplayer because I work on an app that uses video). Also, these all have an associated codelab.

• LiveData/Flow
• ViewModel
• Data Binding
• Coroutines
• Room
• Activities
• Fragments
• Exoplayer

Since I'm only 6 months into my first job, I know I have a whole bunch more to learn, so I will be updating this resource (maybe I'll add a section with the best resources on specific concepts, still trying to figure out coroutines).

Feel free to share other free resources for android developers by commenting or sending me a tweet :)