FragmentFactoryHolderViewModel.kt
/*
* Copyright 2022 The Android Open Source Project
*
* 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.
*/
package androidx.fragment.app.testing
import androidx.activity.viewModels
import androidx.annotation.RestrictTo
import androidx.fragment.app.FragmentActivity
import androidx.fragment.app.FragmentFactory
import androidx.lifecycle.ViewModel
import androidx.lifecycle.ViewModelProvider
/**
* A view-model to hold a fragment factory.
*/
@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP)
class FragmentFactoryHolderViewModel : ViewModel() {
var fragmentFactory: FragmentFactory? = null
override fun onCleared() {
super.onCleared()
fragmentFactory = null
}
companion object {
@Suppress("MemberVisibilityCanBePrivate")
internal val FACTORY: ViewModelProvider.Factory =
object : ViewModelProvider.Factory {
@Suppress("UNCHECKED_CAST")
override fun <T : ViewModel> create(modelClass: Class<T>): T {
val viewModel =
FragmentFactoryHolderViewModel()
return viewModel as T
}
}
fun getInstance(activity: FragmentActivity): FragmentFactoryHolderViewModel {
val viewModel: FragmentFactoryHolderViewModel by activity.viewModels { FACTORY }
return viewModel
}
}
}