Android : ViewModelStore

Android : ViewModelStore

Explore how ViewModelStore works in Android Development!

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1 min read

Ever wondered how ViewModel survive during configuration changes in our Android apps? ๐Ÿค”

Let me introduce you to ViewModelStore!

๐Ÿ” What isViewModelStore?

ViewModelStore is a class that stores and manages ViewModel instances. It's essential for keeping our ViewModels alive during configuration changes like screen rotations.

๐Ÿ“Œ Key Features:

  • RetainViewModels: Keeps ViewModels during configuration changes.

  • Efficient Resource Management: Automatically clears and notifies ViewModels when they are no longer needed, preventing memory leaks.

  • Easy Access: Retrieve ViewModelStore instances using ViewModelStoreOwner.getViewModelStore.

๐Ÿ› ๏ธ How Does it Work?

  1. Storing ViewModels: Use the put method to add a ViewModel with a unique key. If a ViewModel with the same key exists, it's replaced and the old one is cleared.

  2. Retrieving ViewModels: Use the get method to fetch a ViewModel by its key.

  3. Listing Keys: Use the keys method to get a set of all keys.

  4. Clearing ViewModels: Call the clear method to notify and remove all ViewModels.

Implementing ViewModel in our app can significantly enhance its stability and performance. Give it a try and see the difference!


That's it for today. Happy Coding...

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