BaseActivity.java

public abstract class BaseActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(getClass().getAnnotation(InjectLayout.class).value());
        ButterKnife.inject(this);
    }
}

BaseFragment.java

public abstract class BaseFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        int resource = getClass().getAnnotation(InjectLayout.class).value();
        return LayoutInflater.from(getActivity()).inflate(resource, null);
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        ButterKnife.inject(this, view);
    }
}

InjectLayout.java

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
public @interface InjectLayout {

    int value();
}