Android Lollipop RippleDrawable vs Selector for Pre-Lollipop
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/24607339/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Lollipop RippleDrawable vs Selector for Pre-Lollipop
提问by Neoh
I have buttons with different draw9patch pngas background. Currently the buttons are controlled by selectorwhich look something like this:
我有不同 draw9patchpng作为背景的按钮。目前，按钮由selector它控制，看起来像这样：
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/pressed" android:state_pressed="true"/>
<item android:drawable="@drawable/disabled" android:state_enabled="false"/>
<item android:drawable="@drawable/focused" android:state_focused="true"/>
<item android:drawable="@drawable/default"/>
</selector>
For the Android Lollipopthey have a RippleDrawablefor the touch effect, which goes something like this:
对于Android Lollipop，它们具有RippleDrawable触摸效果，如下所示：
<ripple xmlns:android="http://schemas.android.com/apk/res/android" android:color="?android:colorControlHighlight">
<item>
...
</item>
</ripple>
Regarding the new touch ripple effect:
关于新的触摸涟漪效果：
1:Can I set draw9patch as background for RippleDrawable?
1：我可以将 draw9patch 设置为背景RippleDrawable吗？
2:How do I accomodate the above two different xml's I want to follow Material design? Do I have to fork out a new folder/layout xml for the new RippleDrawable?
2：如何适应以上两种不同的xml我想遵循Material design？我是否必须为新的文件夹/布局 xml 分叉RippleDrawable？
回答by alanv
1) Yes. See the documentation for RippleDrawable for more details on how layers are composited, but basically you want:
1) 是的。有关如何合成图层的更多详细信息，请参阅 RippleDrawable 的文档，但基本上您需要：
<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="?android:attr/colorControlHighlight">
<item android:drawable="@drawable/yourninepatch" />
</ripple>
Or to also handle the disabled state in a clean way, you might want:
或者也以干净的方式处理禁用状态，您可能需要：
<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="?android:attr/colorControlHighlight">
<item>
<selector>
<item android:state_enabled="false">
<nine-patch
android:src="@drawable/yourninepatch"
android:alpha="?android:attr/disabledAlpha" />
</item>
<item>
<nine-patch android:src="@drawable/yourninepatch" />
</item>
</selector>
</item>
</ripple>
2) Yes, you should place your ripple XML in drawable-v21.
2) 是的，您应该将您的涟漪 XML 放在 drawable-v21 中。
