ViewModel

Android

This is my note for Udemy lesson: Advanced Android Bootcamp 2024.

1. Add Dependencies

In app/build.gradle, add the following dependencies:

dependencies {
  def lifecycle_version = "2.7.0"
  implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
  implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version"
}

You can check the latest version through this website

2. Create a ViewModel

import androidx.lifecycle.ViewModel

class MainActivityViewModel: ViewModel() {
  ...
}

3. Use the ViewModel in Activity

class MainActivity: AppCompatActivity() {
  private lateinit var viewModel: MainViewModel

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    viewModel = ViewModelProvider(this)[MainActivityViewModel::class.java]
  }
}