Android Study Jams - Coroutine

This is a little introduction of Coroutine and the study jam link to go with it.

Transcript

1. This work is licensed under the Apache 2.0 License Android Study Jams Modern Android Development
2. This work is licensed under the Apache 2.0 License Modern Android Development Pre-requisites Coroutines MotionLayout Using Hilt in your Android App Learn the more advanced techniques of building Android apps using libraries, testing, Jetpack and more to increase the quality of your app • Finished the First Two Tracks Curriculum used Advanced WorkManager Advanced Testing : Survey of Testing Topics Jetpack Compose Basics
3. This work is licensed under the Apache 2.0 License What will you learn? 2 3 1 Coroutines MotionLayout (1 hour) (1 hour) Coroutines are a Kotlin feature that converts async callbacks for long-running tasks, such as database or network access, into sequential code. MotionLayout is a library that lets you add rich motion into your Android app. Modern Android Development Using Hilt in your Android Apps (1 hour) Learn the importance of dependency injection (DI) to create a solid and extensible application that scales to large projects. We'll use Hilt as the DI tool to manage dependencies.
4. This work is licensed under the Apache 2.0 License 5 Advanced Testing: Survey of Topics Learn Coroutines, Room, Databinding and End-to-End Testing. 6 Jetpack Compose Basics Learn Coroutines, Room, Databinding and End-to-End Testing. 4 Advanced WorkManager (1 hour) Teaches advanced WorkManager concepts. It builds on the basic material covered in the Background Work with WorkManager codelab. What will you learn? Modern Android Development (2 hour) (1 hour)
5. This work is licensed under the Apache 2.0 License Android Study Jams Modern Android Development Coroutines
6. This work is licensed under the Apache 2.0 License TOPIC DATE Intro Coroutine Sept 22 Return on Coroutine and intro to MotionLayout Sept 29 Return on MotionLayout and intro Using Hilt in your Android Apps Oct 6 Return on Hilt and intro to Advanced WorkManager Oct 13 Return on Advanced WorkMananger and intro to Advanced Testing: Survey of Topics Oct 20 Return on Advanced Testing and intro to Jetpack Compose Basics Oct 27 Return on Jetpack Compose Basics and thank you Nov 3 Android study Jam Schedule
7. This work is licensed under the Apache 2.0 License Modern Android Development : Coroutines Android Study Jams
8. This work is licensed under the Apache 2.0 License Learning Objectives ० Understand how to use coroutine. ० Use suspend functions to make async code sequential. ० Use launch and runBlocking to control how code executes. ० Learn techniques to convert existing APIs to coroutines using suspendCoroutine. ० Use coroutines with Architecture Components. ० Learn best practices for testing coroutines.
9. This work is licensed under the Apache 2.0 License ० Familiarity with the Architecture Components ViewModel, LiveData, Repository, and Room. ० Experience with Kotlin syntax, including extension functions and lambdas. ० A basic understanding of using threads on Android, including the main thread, background threads, and callbacks. ० Android Studio 4.1 Prerequisites
10. This work is licensed under the Apache 2.0 License Concept Overview What is Coroutine?
11. This work is licensed under the Apache 2.0 License The word “coroutine” is composed of two words: “co” (cooperative) and “routines” (functions). Coroutines are functions that are cooperative. Source : https://www.educative.io/edpresso/what-is-a-coroutine
12. This work is licensed under the Apache 2.0 License How are functions non-cooperative? Source : https://www.educative.io/edpresso/what-is-a-coroutine Usually, when a function calls a second function, the first cannot continue until the second function finishes and returns to where it was called.
13. This work is licensed under the Apache 2.0 License How can functions cooperate with one another? Coroutines are functions where the control is transferred from one function to the other function in a way that the exit point from the first function and the entry point to the second function are remembered – without changing the context. Source : https://www.educative.io/edpresso/what-is-a-coroutine
14. This work is licensed under the Apache 2.0 License // Async callback networkRequest { result -> // Successful network request databaseSave(result) { row-> } } // The same code with coroutine val result = networkRequest() // Successful network request databaseSave(result) // Result saved SEQUENTIAL ASYNC
15. This work is licensed under the Apache 2.0 License ० Replace callbacks by sequential programming ० Ability to make your call main safe with suspend ( in Android ) Advantage of Coroutines
16. This work is licensed under the Apache 2.0 License Some basic tips
17. This work is licensed under the Apache 2.0 License You can see suspend function in Android studio
18. This work is licensed under the Apache 2.0 License “Exceptions in suspend functions work just like errors in regular functions. If you throw an error in a suspend function, it will be thrown to the caller.”
19. This work is licensed under the Apache 2.0 License “The suspend keyword doesn't specify the thread code runs on. Suspend functions may run on a background thread or the main thread.”
20. This work is licensed under the Apache 2.0 License “To switch between any dispatcher, coroutines uses withContext.”
21. This work is licensed under the Apache 2.0 License “In Kotlin, all coroutines run inside a CoroutineScope”
22. This work is licensed under the Apache 2.0 License What you’ll do • Use suspend functions to make async code sequential • Use launch and runBlocking to control how code executes. • Convert APIs to coroutines using suspendCoroutine • Best practices for testing
23. This work is licensed under the Apache 2.0 License Let’s get started
24. This work is licensed under the Apache 2.0 License Start here: https://developer.android.com/codelabs/kotlin-coroutines#0 Collect your badges!
25. This work is licensed under the Apache 2.0 License Carrie Sawyer Build Your First App Pathway Build an Interactive App Layouts Pathway Create a Developer Profile
26. This work is licensed under the Apache 2.0 License Share what you’ve learned with #AndroidStudyJams
27. This work is licensed under the Apache 2.0 License Have a Question? Just ask Join our slack : bit.ly/gdgmontrealslack Joins our channel : #android-study-jams-2021
28. This work is licensed under the Apache 2.0 License Start here: https://developer.android.com/codelabs/kotlin-coroutines#0 Collect your badges!
29. This work is licensed under the Apache 2.0 License Welcome back And congrats!
30. This work is licensed under the Apache 2.0 License Recap of Coroutines ० suspend ० Coroutine inside a viewModel ० Main Safe ० Cancel all coroutines in viewModel ० Coroutine with WorkManager ० Higher order function ० Moving callback to coroutine ० Testing
31. This work is licensed under the Apache 2.0 License Learn More
32. This work is licensed under the Apache 2.0 License Want to learn more about coroutine? • Check out the " Advanced Coroutines with Kotlin Flow and LiveData" codelab to learn more advanced coroutines usage on Android. • Cancellation and exceptions : Part 1: Coroutines, Part 2: Cancellation in coroutines, and Part 3: Exceptions in coroutines. • Coroutine guides by JetBrains • "Improve app performance with Kotlin coroutines" for more usage patterns of coroutines on Android. • WorkManager Version 1.0
33. This work is licensed under the Apache 2.0 License Want to learn more? • Official Android Developers Site: https://developer.android.com/ • Android Samples on GitHub • Official Android Developers Blog (for announcements) • Android Developers Medium Blog (for more technical articles) • Android Developers YouTube channel • Follow @AndroidDev on Twitter • Subscribe to the Android Developer Newsletter • Official Kotlin language site Version 1.0