What is Dependency Injection in Android SDK?

Dependency Injection (DI) is a design pattern used in Android development to improve the modularity and testability of your code. It allows for the decoupling of components in your application by supplying their dependencies from an external source rather than having them create their dependencies internally. This helps make the application easier to manage and test, especially when scaling up.

In Android SDK, DI frameworks like Dagger, Hilt, and Koin are commonly used. These frameworks handle object creation and provide an easy way to manage the lifecycle of dependencies.

Here’s a simple example of Dependency Injection using Dagger in an Android application:


        @Module
        class NetworkModule {
            @Provides
            fun provideRetrofit(): Retrofit {
                return Retrofit.Builder()
                    .baseUrl("https://api.example.com")
                    .addConverterFactory(GsonConverterFactory.create())
                    .build()
            }
        }

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

        class MainActivity : AppCompatActivity() {
            @Inject
            lateinit var retrofit: Retrofit

            override fun onCreate(savedInstanceState: Bundle?) {
                super.onCreate(savedInstanceState)
                DaggerAppComponent.create().inject(this)
            }
        }

Dependency Injection Android SDK Dagger Hilt Koin Modular Programming Testability

What is Dependency Injection in Android SDK?

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What is Dependency Injection in Android SDK?

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