如何从绘制参考样式 [英] How to reference from drawable to style

问题描述

我和标签的应用程序有两个主题。在每个主题中的标签在选中和未选中状态不同的图像。我怎么能正确按主题参考图像？

My app with tabs has two themes. In each theme tabs have different images in selected and unselected state. How I can properly reference to image by theme?

例如。我在的themes.xml

For example. I have in themes.xml

<?xml version="1.0" encoding="utf-8"?>

<style name="LightTheme" parent="@android:style/Theme.Light">
    <item name="tabShows">@drawable/ic_tab_shows_unselected_light</item>
    <item name="tabShowsSelected">@drawable/ic_tab_shows_selected_light</item>
    <item name="tabNews">@drawable/ic_tab_news_selected_light</item>
    <item name="tabNewsSelected">@drawable/ic_tab_news_unselected_light</item>
</style>

<style name="DarkTheme" parent="@android:style/Theme.Black">
    <item name="tabShows">@drawable/ic_tab_shows_unselected_dark</item>
    <item name="tabShowsSelected">@drawable/ic_tab_shows_selected_dark</item>
    <item name="tabNews">@drawable/ic_tab_news_selected_dark</item>
    <item name="tabNewsSelected">@drawable/ic_tab_news_unselected_dark</item>
   </style>

另外我有一个tab_shows.xml和tab_news.xml

Also I have a tab_shows.xml and tab_news.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item  android:state_selected="true" android:drawable="@drawable/ic_tab_shows_selected_light"/>
<item  android:state_selected="false" android:drawable="@drawable/ic_tab_shows_unselected_light" />

我怎么能根据当前主题的选择参考所需的图像？ 这不是我的工作。

How I can reference to needed image in selector according to current theme? This not work for me

<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item  android:state_selected="true" android:drawable="?tabShowsSelected"/>
<item  android:state_selected="false" android:drawable="?tabShows" />

在布局文件工作的，我的意思是，通过参照风格？的styleName

In layout files this works, I mean reference to style via ?styleName

推荐答案

建立你的阶梯A和B型

在你的情况，你把机器人：可绘制=@可绘制/ ic_tab_shows_selected_light，而不是背景（我只是复制snipets从我的code）                  ＃000         

in your case you put android:drawable="@drawable/ic_tab_shows_selected_light" instead of background (I just copied snipets from my code) #000

    <style name="styleB">
        <item name="android:background">#000</item>
    </style>

你的主题A

your theme A

<style name="Theme.Blue">
        <item name="pageBackground">@style/styleA</item>
    </style>

主题B

<style name="Theme.Blue">
        <item name="pageBackground">@style/styleB</item>
    </style>

在你的attr.xml

in your attr.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <attr name="pageBackground" format="reference" />
</resources>

终于在你的widget你的风格=？pageBackground

finally in your widget you do style="?pageBackground"

这篇关于如何从绘制参考样式的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！