A: 6 - ui/example_1/fragment/Example1Fragment.java

Example1Fragment.java

public final class Example1Fragment extends BaseFragment implements View.OnClickListener {

    @Inject
    SingletonUtil singletonUtil;

    @Inject
    PerActivityUtil perActivityUtil;

    @Inject
    PerFragmentUtil perFragmentUtil;

    private TextView someText;
    
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.example_1_fragment, container, false);
    }

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        // TODO (Butterknife) replace with butterknife view binding
        someText = (TextView) view.findViewById(R.id.some_text);
        view.findViewById(R.id.do_something).setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.do_something:
                onDoSomethingClicked();
                break;
            default:
                throw new IllegalArgumentException("Unhandled view " + v.getId());
        }
    }

    private void onDoSomethingClicked() {
        String something = singletonUtil.doSomething();
        something += "\n" + perActivityUtil.doSomething();
        something += "\n" + perFragmentUtil.doSomething();
        showSomething(something);
    }

    private void showSomething(String something) {
        someText.setText(something);
    }
}