从一个dagger2模块中如何访问另一个dagger2模块中提供的SharedPreferences [英] from one dagger2 module how to access the SharedPreferences provided in another dagger2 module

问题描述

具有从一个dagger2模块提供的SharedPreferences，在另一个dagger2模块中想使用它，
怎么做?

Having the SharedPreferences provided from one dagger2 module, in another dagger2 module would like to use it,
how to do it?

以下代码似乎无法正常工作.

the code below seems not working.

/**组件*/

@Singleton
@Component(modules = arrayOf(DataManagerModule::class, 
                             AnotherModule::class))
interface DataManagerComponent {
    fun getDataManager() : DataManager
    fun getSharedPreferences() : SharedPreferences
}

/**模块1 */

@Module
class DataManagerModule(@ApplicationContext private val appContext: Context) {

    @Singleton
    @Provides
    @ApplicationContext
    fun provideApplicationContext(): Context = appContext

    @Singleton
    @Provides
    fun provideSharedPreferences(): SharedPreferences {
        return appContext.getSharedPreferences(appContext.packageName, 
        Context.MODE_PRIVATE)
    }
}

/**模块2 */

@Module
class AnotherModule(private val config1: String?, private val config2: Int?) {

    @Provides
    @Singleton
    internal fun provideClass2(context: Context): Class2 {

        if (config2 == null) {

            // how to get the preferences???
            // getSharedPreferences().edit().getInt(Constants.Settings, -1)

        }

        return class2(config1, config2, context)
    }
}

推荐答案

由于所有这些工件都具有相同的作用域，并且该组件是使用两个模块构建的，因此您应该能够简单地将SharedPreferences作为参数添加到provideClass2()以便在Class2的构造中使用它，就像这样:

since all these artifacts share the same scope, and the component is built using both modules, you should be able to simply add SharedPreferences as a parameter to provideClass2() in order to use it in the construction of Class2, like so:

@Provides
@Singleton
internal fun provideClass2(context: Context, prefs: SharedPreferences): Class2 {
    ...
}

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