问题描述
大家好，
我有2个问题关于在Android中一个ListView：
I have 2 questions regarding a ListView in Android:
-
我怎么能获得 ListView的焦点行的颜色？我试图使用 ListView.getSelector（）方式，根据其文档应该给我，我要找的，但它给我，我不知道如何检索可绘制对象从颜色（如果可能的话...）。
How can I get the color of the listview's focused row ?I tried to use the ListView.getSelector() method, which according to its documentation should give me what I'm looking for, but it's giving me a Drawable object which I don't know how to retrieve the color from (if possible...).
我怎么能设置 ListView的焦点行的颜色？在这里，我试图使用 setSelector（）方式上的列表视图，传递一个ColorDrawable对象，但这样做的结果是，列表视图的整个背景是画在色彩...这不是我想要的东西，当然...
How can I set the color of the listview's focused row ?Here I tried to use the setSelector() method on the listview, passing it a ColorDrawable object, but the result of doing it is that the whole background of the list view is painted in that color... and this is not what I wanted of course...
谢谢！
推荐答案
该列表选择可绘制的是<$c$c>StateListDrawable ＆mdash;它包含引用到多个可绘制每个状态的列表可以，比如选择，有重点，pressed，残疾人......
The list selector drawable is a StateListDrawable — it contains reference to multiple drawables for each state the list can be, like selected, focused, pressed, disabled...
虽然你可以使用检索绘制 getSelector（），我不相信你可以检索特定绘制对象从 StateListDrawable ，也不会似乎可以以编程方式直接获取颜色 ColorDrawable 反正。
While you can retrieve the drawable using getSelector(), I don't believe you can retrieve a specific Drawable from a StateListDrawable, nor does it seem possible to programmatically retrieve the colour directly from a ColorDrawable anyway.
至于设置颜色，你需要一个 StateListDrawable 如上所述。您可以使用 Android的设置这个清单上：listSelector 属性，定义绘制在XML中是这样的：
As for setting the colour, you need a StateListDrawable as described above. You can set this on your list using the android:listSelector attribute, defining the drawable in XML like this:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_enabled="false" android:state_focused="true"
android:drawable="@drawable/item_disabled" />
<item android:state_pressed="true"
android:drawable="@drawable/item_pressed" />
<item android:state_focused="true"
android:drawable="@drawable/item_focused" />
</selector>
这篇关于Android的ListView中选择颜色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！