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<?xml version="1.0" encoding="UTF-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_selected="true" android:color="@color/white" /> <item android:state_checked="true" android:color="@color/white" /> <item android:color="@color/black" /> </selector>
官方对各个state属性的介绍如下：
| XML Attributes | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Attribute Name | Related Method | Description | |||||||||
| android:constantSize | If true, the drawable‘s reported internal size will remain constant as the state changes; the size is the maximum of all of the states. | ||||||||||
| android:state_activated | State value for StateListDrawable, set when a view or its parent has been "activated" meaning the user has currently marked it as being of interest. |
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| android:state_active | State value for StateListDrawable. |
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| android:state_checkable | State identifier indicating that the object may display a check mark. | ||||||||||
| android:state_checked | State identifier indicating that the object is currently checked. | ||||||||||
| android:state_enabled | State value for StateListDrawable, set when a view is enabled. |
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| android:state_first | State value for StateListDrawable. |
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| android:state_focused | State value for StateListDrawable, set when a view has input focus. |
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| android:state_last | State value for StateListDrawable. |
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| android:state_middle | State value for StateListDrawable. |
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| android:state_pressed | State value for StateListDrawable, set when the user is pressing down in a view. |
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| android:state_selected | State value for StateListDrawable, set when a view (or one of its parents) is currently selected. |
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| android:state_single | State value for StateListDrawable. |
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| android:state_window_focused | State value for StateListDrawable, set when a view‘s window has input focus. |
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| android:variablePadding | If true, allows the drawable‘s padding to change based on the current state that is selected. | ||||||||||
| android:visible | Indicates whether the drawable should be initially visible. | ||||||||||
注意:如果有多个item，那么程序将自动从上到下进行匹配，最先匹配的将得到应用。（不是通过最佳匹配）
如果一个item没有任何的状态说明，那么它将可以被任何一个状态匹配。
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原文地址：http://www.cnblogs.com/liaojie970/p/5841778.html
