Common mistakes when working with Dagger 2?

Android, Dagger 2, Dependency Injection, Common Mistakes, Android Development
Exploring common mistakes developers make when using Dagger 2 in Android applications to enhance dependency injection practices.

Working with Dagger 2 can significantly improve your dependency injection in Android, but developers often make mistakes that can lead to runtime errors or inefficient code. Here are some common pitfalls:

1. Missing Annotations

Ensuring that all classes that require dependency injection are correctly annotated is crucial:

@Inject lateinit var someDependency: SomeDependency

2. Forgetting to Include Modules

If you forget to include necessary modules, your dependencies may not be provided:

@Component(modules = [SomeModule::class]) interface AppComponent { fun inject(activity: MainActivity) }

3. Incorrect Scope Usage

Using the wrong scope can lead to memory leaks or unexpected behavior:

@ActivityScope @Provides fun provideActivity(): MainActivity { return MainActivity() }

4. Circular Dependencies

Be cautious of circular dependencies, which can result in crashes or runtime exceptions.

5. Initialization Order

Make sure to consider the order of initialization, as some components may depend on others being initialized first.

6. Misconfigured Component Interfaces

Check that your component interfaces are correctly set up to expose the dependencies:

@Component interface AppComponent { fun inject(target: Target) }

Android Dagger 2 Dependency Injection Common Mistakes Android Development

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