从ViewModel访问strings.xml [英] Accessing strings.xml from ViewModel

问题描述

我正在使用Dagger 2 DataBindng和具有ViewModels的新Android Lifecycle组件.

I am using Dagger 2 DataBindng and the new Android Lifecycle components, which have ViewModels.

在我的ViewModel内部，我如何访问我的strings.xml?起初我在想将Context注入到viewModel中，但是，这只会泄漏内存.

Inside my ViewModel how could I get access to my strings.xml? I was thinking at first, to inject a Context into the viewModel, however, this will just leak memory.

还有其他方法吗?

推荐答案

有一个

There is an AndroidViewModel, which receives Application instance as parameter.

来自文档:

可识别应用程序上下文的 ViewModel .

子类必须具有一个接受 Application 作为唯一参数的构造函数.

Subclasses must have a constructor which accepts Application as the only parameter.

您可以使用该参数从strings.xml中检索字符串.

You can retrieve a string from strings.xml using that parameter.

链接中的存储库使用 ViewModel ，而不使用AndroidViewModel.如果我将ViewModel扩展为使用 AndroidViewModel 并包含 Application -它尝试插入 MyApplication 而不是 Application 很有道理.

The repo in the link, however uses ViewModel and not AndroidViewModel. If I extend my ViewModel to use AndroidViewModel and include the Application - it's trying to inject MyApplication instead of Application if that makes sense.

我已经检出了 GithubBrowserSample .这是UserViewModel的样子:

I've checked out GithubBrowserSample. Here's how UserViewModel looks like:

    public class UserViewModel extends ViewModel {
        ...
        @Inject
        public UserViewModel(UserRepository userRepository, RepoRepository repoRepository) {
            ...
        }
        ...
    }

这是我所做的更改:

    public class UserViewModel extends AndroidViewModel {
        ...
        @Inject
        public UserViewModel(Application application, UserRepository userRepository, RepoRepository repoRepository) {
            super(application);
            ...
        }
        ...
    }

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