Dagger 2 injecting Android Application Context

by 
@Module
public class MainActivityModule {    
    private final Context context;

    public MainActivityModule (Context context) {
        this.context = context;
    }

    @Provides //scope is not necessary for parameters stored within the module
    public Context context() {
        return context;
    }
}

@Component(modules={MainActivityModule.class})
@Singleton
public interface MainActivityComponent {
    Context context();

    void inject(MainActivity mainActivity);
}

And then

MainActivityComponent mainActivityComponent = DaggerMainActivityComponent.builder()
    .mainActivityModule(new MainActivityModule(MainActivity.this))
    .build();

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