无法从android命名空间解析属性

Question

我想将一些风格应用于VIM - Vi IMproved 7.4 (2013 Aug 10, compiled Nov 24 2016 16:43:18) Included patches: 1-52 Extra patches: 8.0.0056 Modified by pkg-vim-maintainers@lists.alioth.debian.org Compiled by buildd@ Huge version without GUI. Features included (+) or not (-): +acl +farsi +mouse_netterm +syntax +arabic +file_in_path +mouse_sgr +tag_binary +autocmd +find_in_path -mouse_sysmouse +tag_old_static -balloon_eval +float +mouse_urxvt -tag_any_white -browse +folding +mouse_xterm -tcl ++builtin_terms -footer +multi_byte +terminfo +byte_offset +fork() +multi_lang +termresponse +cindent +gettext -mzscheme +textobjects -clientserver -hangul_input +netbeans_intg +title -clipboard +iconv +path_extra -toolbar +cmdline_compl +insert_expand -perl +user_commands +cmdline_hist +jumplist +persistent_undo +vertsplit +cmdline_info +keymap +postscript +virtualedit +comments +langmap +printer +visual +conceal +libcall +profile +visualextra +cryptv +linebreak +python +viminfo +cscope +lispindent -python3 +vreplace +cursorbind +listcmds +quickfix +wildignore +cursorshape +localmap +reltime +wildmenu +dialog_con -lua +rightleft +windows +diff +menu -ruby +writebackup +digraphs +mksession +scrollbind -X11 -dnd +modify_fname +signs -xfontset -ebcdic +mouse +smartindent -xim +emacs_tags -mouseshape -sniff -xsmp +eval +mouse_dec +startuptime -xterm_clipboard +ex_extra +mouse_gpm +statusline -xterm_save +extra_search -mouse_jsbterm -sun_workshop -xpm system vimrc file: "$VIM/vimrc" user vimrc file: "$HOME/.vimrc" 2nd user vimrc file: "~/.vim/vimrc" user exrc file: "$HOME/.exrc" fall-back for $VIM: "/usr/share/vim" Compilation: gcc -c -I. -Iproto -DHAVE_CONFIG_H -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1 Linking: gcc -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,--as-needed -o vim -lm -ltinfo -lnsl -lselinux -lacl -lattr -lgpm -ldl -L/usr/lib/python2.7/config-x86_64-linux-gnu -lpython2.7 -lpthread -ldl -lutil -lm -Xlinker -export-dynamic -Wl,-O1 -Wl,-Bsymbolic-functions 。在platform's attrs.xml中，我们可以看到DatePicker styleable的以下属性：

DatePicker

虽然我可以引用<declare-styleable name="DatePicker"> ... <!-- The text color for the selected date header text, ex. "2014" or "Tue, Mar 18". This should be a color state list where the activated state will be used when the year picker or day picker is active.--> <attr name="headerTextColor" format="color" /> <!-- The background for the selected date header. --> <attr name="headerBackground" /> ... </declare-styleable> ，但我不能对android:headerBackground属性这样做。因此，请遵循android:headerTextColor中的代码：

styles.xml

提示错误，<style name="MyDatePickerStyle" parent="@android:style/Widget.Material.DatePicker"> <item name="android:headerBackground">@color/red</item> <item name="android:headerTextColor">@color/red</item> </style> 无法解析。

但我可以clearly see android:headerTextColor覆盖该属性。有趣的是，这段代码前面带有Widget.Material.DatePicker注释，这可能会以某种方式导致此行为的原因。

这种行为可能是什么原因以及如何覆盖该属性？

^{在Android Studio 2.3上运行，minSdkVersion 23，buildToolsVersion 25.0.3，  compileSdkVersion＆amp; targetSdkVersion 23，无效的缓存和清理的项目。}

正如您在R.attr docs中所看到的，有一些属性背后的文字：

  

此常量在API级别23中已弃用。请改用 headerTextColor 。

这意味着，此属性应该公开给公共API，但不知何故它被剥离而AAPT无法访问它。

在错误跟踪器上打开an issue。

Answer 1

AAPT说该属性是私有的。可能他们错过了@hide

中的attrs.xml

Answer 2

已经有一段时间了，但是由于尚未解决，我通过在这样的片段中调用picker.show（）之后，获取标题的视图ID，然后直接以编程方式设置文本颜色来解决此问题。希望这将对遇到这个问题的人有所帮助。

int yearSpinnerId = Resources.getSystem().getIdentifier("date_picker_header_year", "id", "android");
AppCompatTextView year = picker.findViewById(yearSpinnerId);
int headerTextId = Resources.getSystem().getIdentifier("date_picker_header_date", "id", "android");
AppCompatTextView selectedDate = picker.findViewById(headerTextId);
year.setTextColor(getResources().getColor(R.color.white_FFFFFF));
selectedDate.setTextColor(getResources().getColor(R.color.white_FFFFFF));

Answer 3

尝试使用此

Style.xml

@RequestMapping(value = "/edit", method = RequestMethod.GET)
public String edit(Model model) {
    model.addAttribute("data", new Shop());
    return "shop/edit";
}

@RequestMapping(value = "/edit/update", method = RequestMethod.POST)
public String update(@ModelAttribute Shop shop) {
    if (shop.getId() == null) {
        shopService.createShop(shop);
    }

    return "redirect:/";
}

值文件夹 attr.xml

 <style name="DatePicker">
        <item name="android:headerBackground">@color/colorPrimaryDark</item>
        <item name="headerTextColor">@color/colorAccent</item>
 </style>