我如何在模块中添加视图模型? [英] How i can add view model in module?

问题描述

在Dagger中，如何向模块添加模型? 例如，我通过以下方式添加了演示者:

In Dagger, how can I add a model to Module? For example I added the presenter in the following way:

@Module
class AboutModule(val appContext: Context) {

    @FragmentScope
    @Provides
    fun providePresenter(): AboutListContract.Presenter {
        return AboutListPresenter(appContext = appContext)
    }
}

现在，我想添加我的View模型以及appContext.

Now i want want to add my View model, also with appContext.

class AboutViewModel(val appContext: Context): ViewModel() {

更新: 我可以这样添加视图模型吗?

UPDATE: Can i add my view model smth like this?

@Module

    class AboutModule(val appContext: Context) {

        @FragmentScope
        @Provides
        fun provideModel(model: AboutViewModel): ViewModel {
            return AboutViewModel(appContext = appContext)
        }
    }

推荐答案

我用下一个解决方案解决了我的问题:

I solved my problem with next solution:

@Module
class AboutModule(val appContext: Context) {

    @FragmentScope
    @Provides
    fun provideFactory(): AboutViewModelFactory {
        return AboutViewModelFactory(appContext)
    }
}

在片段中这样写: class AboutFragment:BaseFragment()，OnItemClickListener {

And in fragment write smth like this: class AboutFragment : BaseFragment(), OnItemClickListener {

lateinit var viewModel: AboutViewModel
@Inject lateinit var viewModelFactory: AboutViewModelFactory

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

    viewModel = ViewModelProviders
        .of(this, viewModelFactory)
        .get(AboutViewModel::class.java)
}

private fun injectDependencies() {
    activity?.let {
        DaggerAboutComponent.builder().aboutModule(AboutModule(it)).build().inject(this)
    }
}

很好的建议: https://stackoverflow.com/a/60884492/6387618

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