MyTestingApp.java

public class MyTestingApp extends Application {

    ApplicationComponent applicationComponent;

    @Override
    public void onCreate() {
        super.onCreate();
    }

    public ApplicationComponent getComponent() {
        if (applicationComponent == null) {
            applicationComponent = DaggerApplicationComponent.builder()
                    .applicationModule(new ApplicationModule(this))
                    .build();
        }
        return applicationComponent;
    }
}