ViewModelStoreOwner in Android

ViewModel Under the hood

Image from Android’s 15th Anniversary

This short article explains what is ViewModelStoreOwner in Android and how it makes an Android App DEveloper’s life easy.

In Android development, a ViewModelStoreOwner is an interface that is implemented by components, such as activities and fragments, to manage and hold instances of ViewModels.

A ViewModel is a class designed to store and manage UI-related data in a lifecycle-conscious way.

ViewModelStoreOwner Interface:

• An interface implemented by components like activities and fragments.
• It is responsible for managing the lifecycle and storage of ViewModels.

import androidx.lifecycle.ViewModel
import androidx.lifecycle.ViewModelProvider
import androidx.lifecycle.ViewModelStoreOwner
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle

class MainActivity : AppCompatActivity(), ViewModelStoreOwner {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // Creating a ViewModel using ViewModelProvider
        val viewModel: MyViewModel = ViewModelProvider(this).get(MyViewModel::class.java)

        // Accessing data or methods from the ViewModel
        viewModel.someMethod()…