amitshekhariitbhu/learn-kotlin-coroutines

Learn Kotlin Coroutines by real examples for Android

Learn Kotlin Coroutines by real examples for Android

About this project:

• This project is for someone who wants to get started with Kotlin Coroutines.
• I have tried to add the examples we implement in our Android project frequently.

About me

Hi, I am Amit Shekhar, I have mentored many developers, and their efforts landed them high-paying tech jobs, helped many tech companies in solving their unique problems, and created many open-source libraries being used by top companies. I am passionate about sharing knowledge through open-source, blogs, and videos.

You can connect with me on:

• Twitter
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• LinkedIn
• GitHub

Steps to learn Kotlin Coroutines from this project

• Learn all the concepts of Kotlin Coroutines from this blog: Mastering Kotlin Coroutines
• Learn about the Launch vs Async in Kotlin Coroutines from here: Launch vs Async in Kotlin Coroutines
• Learn about the Dispatchers from here: Dispatchers in Kotlin Coroutines
• Learn about the coroutineScope vs supervisorScope from here: coroutinescope vs supervisorscope
• Blog suspend function in Kotlin Coroutines
• Blog Kotlin withContext vs Async-await
• Blog Callback to Coroutines in Kotlin
• Blog Retrofit with Kotlin Coroutines
• Blog Parallel Multiple Network Calls Using Kotlin Coroutines
• Blog Room Database with Kotlin Coroutines
• Blog Unit Testing ViewModel with Kotlin Coroutines and LiveData
• Then, just clone, build, run the project and start learning Kotlin Coroutines by examples.

You will learn the following from this Learn Kotlin Coroutines project:

• Step by step guide on how to implement the Kotlin Coroutines in Android.
• Doing simple task in background using Kotlin Coroutines.
• Doing tasks in series using Kotlin Coroutines.
• Doing tasks in parallel using Kotlin Coroutines.
• Making two network calls in parallel using Kotlin Coroutines.
• What are scopes in Kotlin Coroutines?
• Canceling background task using Kotlin Coroutines.
• Exception handling in Kotlin Coroutines.
• Using Kotlin Coroutines with Retrofit. Blog: Retrofit with Kotlin Coroutines
• Using Kotlin Coroutines with Room Database.
• Using Kotlin Coroutines with various 3rd party libraries.
• Adding timeout to a task using Kotlin Coroutines.
• Writing Unit-Test for ViewModel which uses Kotlin Coroutines.

Kotlin Coroutines Examples for Android Development: Activity and ViewModel

• Single Network Call: Learn how to make a network call using Kotlin Coroutines. This is a very simple use-case in Android App Development. Blog: Retrofit with Kotlin Coroutines

  • Activity Code
  • ViewModel Code

• Series Network Calls: Learn how to make network calls in series using Kotlin Coroutines. This is useful when you want to make a network call which is dependent on an another network call.

  • Activity Code
  • ViewModel Code

• Parallel Network Calls: Learn how to make network calls in parallel using Kotlin Coroutines. This is useful when you want to make network calls in parallel which are independent of each other.

  • Activity Code
  • ViewModel Code

• Room Database Operation: Learn how to fetch or insert entity in database using Kotlin Coroutines. This is useful when you are using Room Database in your Android Application.

  • Activity Code
  • ViewModel Code

• Long Running Task: Learn how to run a long running task using Kotlin Coroutines. If you want to do any of your task in background thread using the Kotlin Coroutines, then this is useful.

  • Activity Code
  • ViewModel Code

• Two Long Running Tasks: Learn how to run two long running tasks in parallel using Kotlin Coroutines.

  • Activity Code
  • ViewModel Code

• Timeout: Learn how to add timeout to a task using Kotlin Coroutines. If you want to add a timeout to any of your background task in Android, this is going to super useful.

  • Activity Code
  • ViewModel Code

• Try-Catch Error Handling: Learn how to handle error in Kotlin Coroutines using Try-Catch.

  • Activity Code
  • ViewModel Code

• CoroutineExceptionHandler: Learn how to handle error in Kotlin Coroutines using CoroutineExceptionHandler.

  • Activity Code
  • ViewModel Code

• Ignore Error And Continue: Learn how to use supervisorScope to ignore error of a task and continue with other task. In other words, if more than two child jobs are running in parallel under a supervisor, one child job gets failed, we can continue with other.

  • Activity Code
  • ViewModel Code

• Unit Test: Learn how write unit-test for ViewModel which uses Kotlin Coroutines.

  • ViewModelTest Code

If this project helps you in anyway, show your love ❤️ by putting a ⭐ on this project ✌️

License

   Copyright (C) 2022 Amit Shekhar

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

Contributing to Learn Kotlin Coroutines

Just make pull request. You are in!

Thanks

Amit Shekhar

You can connect with me on:

• Twitter
• LinkedIn
• GitHub
• Facebook

Read all of my blogs here.

learn-kotlin-coroutines's Issues

Why apiHelper not using any separate dispatcher here?

In SingleNetworkCall feature you are launching a coroutine in the viewmodel. As no dispatcher mentioned it uses the main thread. Again in the apiHelper suspend function there is no use of Dispathcer.IO . Should not we use that as it is doing I/O task? Yes retrofit it handling the network part. But still I am thinking of the right approach. @amitshekhariitbhu