android - Different between direct embedded and use @ simple -


i trying create button style includes customize background , pressed background changes response. have done using , drawable.

the style

<style name="boltbutton" parent="android:style/widget.button">     <item name="android:background">@drawable/gree_btn_background</item>     <item name="android:paddingtop">10dp</item>     <item name="android:paddingbottom">10dp</item> </style>

/drawable/gree_btn_background.xml

<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android">     <item android:state_pressed="true" android:drawable="@color/btn_pressed"/>     <item android:state_focused="true" android:drawable="@color/btn_focuse"/>     <item android:drawable="@color/btn_green"/> </selector>

the above setting works, try remove drawable file , try put directly under <item name="android:background"></item>, error comes out, different between using @ , directly use it? why above case didn't work?

the below code doesn't work

<item name="android:background">       <selector >         <item android:state_pressed="true" android:drawable="@color/bolt_btn_pressed"/>         <item android:state_focused="true" android:drawable="@color/bolt_btn_focuse"/>         <item android:drawable="@color/bolt_btn_green"/>       </selector> </item>

<item name="android:background"></item> inside that, expecting id drawable, not <selector>.

so should give drawable id give earlier <item name="android:background">@drawable/gree_btn_background</item>


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