@How to use bindsinstance in dagger2

Don't use @BindsInstance

@BindsInstance Is used to remove Module The parameterized constructor of the module . For example, we now have a dependency is Context, So how to provide it ？ One way is through a module Class's constructor injection , And by the module Provide Context To others module Class uses ：

@Module
class AppModule(val app: Application) {
    
    
    @Provides
    @Singleton
    fun provideApplication(): Application = app
    
    @Provides
    @Singleton
    fun provideSharedPreferences(app: Application): SharedPreferences = app.getSharedPreferences("Share", Context.MODE_PRIVATE)
    
}

@Singleton
@Component(modules = [AndroidInjectionModule::class,AppModule::class,ToastMakerModule::class,MainActivityModule::class])
interface AppComponent {
    

    @Component.Builder
    interface Builder {
    
        // without @BindsInstance
        fun appModule(appModule: AppModule):Builder

        fun build():AppComponent

    }

    fun inject(app:StApplication)
}

        appComponent = DaggerAppComponent
            .builder()
            .appModule(AppModule(this))
            .build()

        appComponent.inject(this)

Use @BindsInstance

Use @BindsInstance The purpose of is not to pass a module Class to inject dependencies , Directly in component Provide during initialization , Such as ：
Remove first module Class constructor ：

@Module
class AppModule {
    

    @Provides
    @Singleton
    fun provideSharedPreferences(app: Application): SharedPreferences = app.getSharedPreferences("Share", Context.MODE_PRIVATE)

}

stay Component Inflow dependence ：

@Singleton
@Component(modules = [AndroidInjectionModule::class,AppModule::class,ToastMakerModule::class,MainActivityModule::class])
interface AppComponent {
    

    @Component.Builder
    interface Builder {
    
// with @BindsInstance
        @BindsInstance
        fun provideContext(app: Application):Builder

        fun build():AppComponent

    }

    fun inject(app:StApplication)
}

// with @BindsInstance
        appComponent = DaggerAppComponent
            .builder()
            .provideContext(this)
            .build()

        appComponent.inject(this)

For example ：
https://github.com/wongkyunban/MyDaggerDemo