状态列表可绘制和禁用状态

问题描述：

我有一个按钮，设置时希望它具有不同的背景

I have a button and I want it to have different background when I set:

android:enabled="false"

这里是背景的资源文件:

Here's resource file for background:

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="false"
          android:drawable="@drawable/bttn_orange_normal" /> <!-- pressed -->
    <item android:state_pressed="true"
          android:drawable="@drawable/bttn_orange_selected" /> <!-- focused -->
    <item android:state_enabled="false" android:drawable="@drawable/bttn_grey_disabled"/>
    <item android:state_enabled="true" android:drawable="@drawable/bttn_orange_normal"/>
</selector>

但是当按钮被禁用时，它仍然具有正常的背景. 我想念什么?

But button still has normal background when it is disabled. What am I missing?

答

放入此行:

<item android:state_enabled="false" android:drawable="@drawable/bttn_grey_disabled"/>

作为selector标记的第一项(必须是第一项，否则将不起作用).

as first item (it must be first item, otherwise it will not work) of the selector tag.

最终:

<selector xmlns:android="http://schemas.android.com/apk/res/android">
            <item android:state_enabled="false" android:drawable="@drawable/bttn_grey_disabled"/>
            <item android:state_pressed="false"
              android:drawable="@drawable/bttn_orange_normal" /> <!-- pressed -->
            <item android:state_pressed="true"
              android:drawable="@drawable/bttn_orange_selected" /> <!-- focused -->
            <item android:state_enabled="true" android:drawable="@drawable/bttn_orange_normal"/> <!-- idle state -->
</selector>

状态列表可绘制和禁用状态

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