我怎么能告诉匕首刀柄使用我自己的ViewModelFactory而不是默认？

Question

代码： GalleryViewModel

import androidx.lifecycle.SavedStateHandle
import androidx.lifecycle.ViewModel
import androidx.lifecycle.switchMap
import androidx.lifecycle.viewModelScope
import androidx.paging.cachedIn
import com.jimmytrivedi.kotlin.imagesearchapp.data.UnsplashRepository
import dagger.assisted.Assisted
import javax.inject.Inject

class GalleryViewModel @Inject constructor(
    private val repository: UnsplashRepository,
    @Assisted state: SavedStateHandle
) :
    ViewModel() {

    private val currentQuery = state.getLiveData(CURRENT_QUERY, DEFAULT_QUERY)

    val photos = currentQuery.switchMap { queryString ->
        repository.getSearchResults(queryString).cachedIn(viewModelScope)
    }

    fun searchPhotos(query: String) {
        currentQuery.value = query
    }

    companion object {
        private const val CURRENT_QUERY = "current_query"
        private const val DEFAULT_QUERY = "cats"
    }
}

画廊简介

import androidx.lifecycle.ViewModel
import androidx.lifecycle.ViewModelProvider
import javax.inject.Inject
import javax.inject.Provider
import javax.inject.Singleton

@Singleton
class GalleryViewModelFactory @Inject constructor(
    private val creators: Map<Class<out ViewModel>, @JvmSuppressWildcards Provider<ViewModel>>
) : ViewModelProvider.Factory {
    override fun <T : ViewModel> create(modelClass: Class<T>): T {
        val creator = creators[modelClass] ?: creators.entries.firstOrNull {
            modelClass.isAssignableFrom(it.key)
        }?.value ?: throw IllegalArgumentException("unknown model class $modelClass")
        try {
            @Suppress("UNCHECKED_CAST")
            return creator.get() as T
        } catch (e: Exception) {
            throw RuntimeException(e)
        }

    }
}

注意：请确保它一直工作到昨天，并且一切都是正确的。我刚刚更新了一些依赖项，我被困在无法创建类的实例。。。ViewModel，所以，我搜索了stack overflow，得到了正确的答案，但在我的AS中，当我单击GalleryViewModel时，就会显示这个内置类的用法：GalleryViewModelFactory_Factory，但我想使用自己的自定义类来解决错误。

参考：

>

https://github.com/android/architecture-components-samples/blob/d7cd7a9414ef1eeba52a79ec76f6d9827cd50a36/GithubBrowserSample/app/src/main/java/com/android/example/github/viewmodel/GithubViewModelFactory.kt

Android ViewModel没有零参数构造函数

Answer 1

如果我没记错的话，在实例化viewmodel时可以传递自定义viewmodelfactory。例如：

val myViewModel: MyViewModel by viewmodels { myViewModelFactory }