Koin在模块之间共享实例 [英] Koin sharing instances between modules

问题描述

我正在将Koin库用于一个Android项目. 我想在模块之间共享一些实例，因为在整个应用程序中它们经常被使用. 例如:

I'm using the Koin library for an Android project. I want to share some instances between modules since they are used a lot throughout the application. For instance:

val moduleA = module {
    scope(named<FragmentA>()) {
        scoped { FirebaseFirestore.getInstance() }

        scoped { LocalDatabase.getInstance(App.sContext) }
        scoped { NetworkDataSourceA(get()) }    
    }
}

val moduleB = module {
        scope(named<FragmentB>()) {
            scoped { FirebaseFirestore.getInstance() }

            scoped { LocalDatabase.getInstance(App.sContext) }
            scoped { NetworkDataSourceB(get()) }    
        }
    }

从以下模块中可以看到，两个模块之间的FirebaseFirestore.getInstance()和LocalDatabase.getInstance(App.sContext)相同. 有没有一种方法可以让我声明包含FirebaseFirestore.getInstance()和LocalDatabase.getInstance(App.sContext)的moduleC，然后在moduleA和moduleB上调用它?

As we can see from the following modules the FirebaseFirestore.getInstance() and the LocalDatabase.getInstance(App.sContext) are the same between both modules. Is there a way where I can declare lets say a moduleC that contains FirebaseFirestore.getInstance() and the LocalDatabase.getInstance(App.sContext) and then call it on the moduleA and moduleB?

推荐答案

• 您可以通过创建范围来做到这一点.虽然我没有尝试.

  • You can do this by creating scope. Though I didn't tried.

    val moduleA = module {
    scope(named("CommonScope")) {
    
    scoped { FirebaseFirestore.getInstance() }
    scoped { LocalDatabase.getInstance(App.sContext) }
    
    scoped { NetworkDataSourceA(get()) }   
    scoped { NetworkDataSourceB(get()) }  
    
      }
    }
    

  • 现在，使用下面的代码行在FragmentA中创建作用域.( 也与用于NetworkDataSourceB的FragmentB相同)

  • Now, create your scope in your FragmentA using below line.( also same for FragmentB for NetworkDataSourceB)

    private val commonScope = getKoin().getOrCreateScope("scope1",named("CommonScope"))
    val networkDataSourceA = commonScope.get<NetworkDataSourceA>()
    

  • 并在onDestroy方法中

    commonScope.close()
    

    有关更多详细信息，请参见科恩文档(第8点)

    For more detail check koin documentation (8th point)

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