Dependency Injection (DI) is a design pattern that helps to manage dependencies in your code, making it more modular, easier to test, and maintain. In Android development, integrating DI with various components like Activities, Fragments, ViewModels, and Services can lead to cleaner and more efficient code architecture.
Here's an example of how to integrate Dependency Injection using Dagger 2, a popular DI framework in Android.
// Define a module to provide dependencies
@Module
public class AppModule {
@Provides
@Singleton
Context provideContext(Application application) {
return application.getApplicationContext();
}
}
// Define a component that uses the module
@Singleton
@Component(modules = {AppModule.class})
public interface AppComponent {
void inject(MyActivity activity);
}
// An Activity where we use the injected dependencies
public class MyActivity extends AppCompatActivity {
@Inject
Context context;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
DaggerAppComponent.create().inject(this);
// Now you can use 'context' injected by Dagger
}
}
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