android - 键盘背景状态

Question

<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:drawable="@drawable/key" />
<item
android:state_pressed="true"
android:drawable="@drawable/key_pressed" />
<item
android:state_checkable="true"
android:drawable="@drawable/key_function" />
<item
android:state_checkable="true"
android:state_pressed="true"
android:drawable="@drawable/key_pressed" />
<item
android:state_checkable="true"
android:state_checked="true"
android:drawable="@drawable/key_function" />
<item
android:state_checkable="true"
android:state_checked="true"
android:state_pressed="true"
android:drawable="@drawable/key_pressed" />
</selector>

测试结果:

普通键 ->@drawable/key

普通按键按下 ->@drawable/key_pressed

粘滞键->@drawable/key_function

按下粘滞键 ->@drawable/key_function <---问题出在这里

Answer 1

The selection is not based on the "best match," but simply the first item that meets the minimum criteria of the state.

http://developer.android.com/guide/topics/resources/drawable-resource.html#StateList

所以它是错误的可绘制对象，因为其中一个状态与当前状态匹配

<item
android:state_checkable="true"
android:drawable="@drawable/key_function" />  
<item
android:state_checkable="true"
android:state_checked="true"
android:drawable="@drawable/key_function" />

尝试放

<item
android:state_checkable="true"
android:state_checked="true"
android:state_pressed="true"
android:drawable="@drawable/key_pressed" />

在顶部或为以前的案例添加标准。