Created
November 30, 2022 22:46
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ViewModel with Factory
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package com.example.app | |
import android.app.Application | |
import android.content.Context | |
import androidx.lifecycle.AndroidViewModel | |
import androidx.lifecycle.SavedStateHandle | |
import androidx.lifecycle.ViewModel | |
import androidx.lifecycle.ViewModelProvider | |
import androidx.lifecycle.ViewModelProvider.AndroidViewModelFactory.Companion.APPLICATION_KEY | |
import androidx.lifecycle.createSavedStateHandle | |
import androidx.lifecycle.viewmodel.CreationExtras | |
class HomeViewModel( | |
application: Application, | |
savedStateHandle: SavedStateHandle | |
) : AndroidViewModel(application) { | |
private val context: Context | |
get() = getApplication() | |
companion object { | |
val Factory: ViewModelProvider.Factory = object : ViewModelProvider.Factory { | |
@Suppress("UNCHECKED_CAST") | |
override fun <T : ViewModel> create( | |
modelClass: Class<T>, | |
extras: CreationExtras | |
): T { | |
// Get the Application object from extras | |
val application = checkNotNull(extras[APPLICATION_KEY]) | |
// Create a SavedStateHandle for this ViewModel from extras | |
val savedStateHandle = extras.createSavedStateHandle() | |
return HomeViewModel( | |
application, | |
savedStateHandle | |
) as T | |
} | |
} | |
} | |
} |
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