使用ButterKnife库,在1个片段中有2个不同的视图

Question

我目前正在尝试使用Android的ButterKnife库来处理一些样板代码(https://github.com/JakeWharton/butterknife)

我已经设置好了,让它半工作,但我遇到了一个我无法解决的问题:/

我有一个片段,其中包含1个单独的ListView元素,对于这个ListView,我附加了一个包含多个元素的页脚视图.

这是我的片段使用库的代码片段:

public class UsersFragment extends Fragment {
    @InjectView(R.id.users_listview_id) AutoUpdatingListView list;

    private View footerView;
    @InjectView(R.id.add_user_footer_firstname_edittext_id) BootstrapEditText firstnameEditText;
    @InjectView(R.id.add_user_footer_middlename_edittext_id) BootstrapEditText middlenameEditText;
    @InjectView(R.id.add_user_footer_lastname_edittext_id) BootstrapEditText lastnameEditText;
    @InjectView(R.id.add_user_footer_cancel_button_id) BootstrapButton cancelButton;
    @InjectView(R.id.add_user_footer_okay_button_id) BootstrapButton okayButton;
    @InjectView(R.id.add_user_footer_facebook_button) BootstrapCircleThumbnail facebookButton;
    @InjectView(R.id.add_user_footer_google_plus_button) BootstrapCircleThumbnail googlePlusButton;
    @InjectView(R.id.add_user_footer_twitter_button) BootstrapCircleThumbnail twitterButton;
    @InjectView(R.id.add_user_footer_linkedin_button) BootstrapCircleThumbnail linkedInButton;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.user_fragment, container, false);
    footerView = ((LayoutInflater) getActivity().getSystemService(Activity.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.add_user_footer_view, null, false);

    ButterKnife.inject(this, rootView);

    list.setAdapter(adapter);
    }
}

上面的代码不起作用,因为我只能注入1个视图,如果我尝试使用它们(2x注入),第二个注入会覆盖第一个,留下我的空值.

我似乎无法指定哪个视图包含我可以使用常规findViewById()的哪些元素.

为了澄清,这是我的非ButterKnife代码(100%工作):

    list = (AutoUpdatingListView) rootView.findViewById(R.id.users_listview_id);
    firstnameEditText = (BootstrapEditText) footerView.findViewById(R.id.add_user_footer_firstname_edittext_id);
    middlenameEditText = (BootstrapEditText) footerView.findViewById(R.id.add_user_footer_middlename_edittext_id);
    lastnameEditText = (BootstrapEditText) footerView.findViewById(R.id.add_user_footer_lastname_edittext_id);

如上所示,我可以指定"rootView"或"footerView"作为findViewById的目标.

有谁能帮忙解决这个问题？因为它让我疯狂......

Answer 1

简单的解决方案是将所有页脚视图放在视图持有者类中,然后对不同对象执行注入,同时保持片段内容易访问页脚视图.

@InjectView(R.id.users_listview_id) AutoUpdatingListView list;

private View footerView;
public class FooterViewHolder {
    @InjectView(R.id.add_user_footer_firstname_edittext_id) BootstrapEditText firstnameEditText;
    @InjectView(R.id.add_user_footer_middlename_edittext_id) BootstrapEditText middlenameEditText;
    @InjectView(R.id.add_user_footer_lastname_edittext_id) BootstrapEditText lastnameEditText;
    @InjectView(R.id.add_user_footer_cancel_button_id) BootstrapButton cancelButton;
    @InjectView(R.id.add_user_footer_okay_button_id) BootstrapButton okayButton;
    @InjectView(R.id.add_user_footer_facebook_button) BootstrapCircleThumbnail facebookButton;
    @InjectView(R.id.add_user_footer_google_plus_button) BootstrapCircleThumbnail googlePlusButton;
    @InjectView(R.id.add_user_footer_twitter_button) BootstrapCircleThumbnail twitterButton;
    @InjectView(R.id.add_user_footer_linkedin_button) BootstrapCircleThumbnail linkedInButton;

}
private FooterViewHolder footerViewHolder;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.user_fragment, container, false);
    footerView = inflater.inflate(R.layout.add_user_footer_view, container, false);
    footerViewHolder = new FooterViewHolder();

    ButterKnife.inject(this, rootView);
    ButterKnife.inject(footerViewHolder, footerView);

    list.setAdapter(adapter);

    return rootView;
}

顺便说一句,使用null父级来扩充视图被认为是不好的做法.