如何使用匕首注入SharedViewModel? [英] How to inject SharedViewModel using dagger?

问题描述

我在Activity中创建了SharedViewModel

I create my SharedViewModel in Activity :

 mOrdersViewModel=ViewModelProviders.of(this,viewModelFactory.get(OrdersViewModel.class);

之后，我在其他组件(片段)中订阅了LiveData

After, I subscribe to the LiveData in the other components(Fragments)

 mOrdersViewModel = ViewModelProviders.of(Objects.requireNonNull(getActivity())).get(OrdersViewModel.class); 

但是我想使用 mOrdersViewModel ，所以 @Inject OrdersViewModel;

如何注入我的mOrdersViewModel.请帮助我(.

How can I inject my mOrdersViewModel. Help me please (.

推荐答案

在您的 Component 处，像这样注入您的活动:

At your Component, inject your activity like this :

void inject(Activity activity);

然后在您的 模块 中为您的 ViewModel 提供类似的依赖关系:

And in your Module provide dependency like this for your ViewModel:

public Module(Activity activity) {
    this.mActivity = activity;
}

@Provides
YourViewModel provideViewModel(YourViewModel viewModel){
    return ViewModelProviders.of(mActivity).get(viewModel.getClass());
}

用法:

在这样的活动中，

@Inject
YourViewModel mViewModel;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    Component mActivityComponent = DaggerActivityComponent.builder()
                .activityModule(new Module(this))
                .build();
    // then
    mActivityComponent.inject(this);

    // Now you can use your viewModel object in activity anywhere.
}

这篇关于如何使用匕首注入SharedViewModel?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！