＆LT;选择的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android＆GT;
 ＆LT;项目的android：STATE_ pressed =真
       机器人：宽=100dp
       机器人：身高=20dp
       机器人：可绘制=@可绘制/ button_ pressed/＆GT; ＆LT;  - ！pressed  - ＆GT;
 ＆LT;项目安卓state_focused =真
       机器人：宽=100dp
       机器人：身高=20dp
       机器人：可绘制=@可绘制/ button_focused/＆GT; ＆LT;！ - 集中 - ＆GT;
 ＆LT;项目机器人：可绘制=@可绘制/ button_normal/＆GT; ＆LT;！ - 默认 - ＆GT;
 

Hi is there anyway of providing width and height of a drawable defined in drawable.xml in drawable folder.

Example:

 <selector xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:state_pressed="true"
           android:drawable="@drawable/button_pressed" /> <!-- pressed -->
     <item android:state_focused="true"
           android:drawable="@drawable/button_focused" /> <!-- focused -->
     <item android:drawable="@drawable/button_normal" /> <!-- default -->
 </selector>

I wanted to specify width and height maybe somehow using "scale" tag inside it which i tried but didnt worked. This is my code:

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/icon_ratingstar">
        <scale android:scaleWidth="20" android:scaleHeight="20" android:drawable="@drawable/icon_ratingstar" />
    </item>
</selector>

You can specify inside the <item> tag the width and height of the drawable:

<selector xmlns:android="http://schemas.android.com/apk/res/android">
 <item android:state_pressed="true"
       android:width="100dp"
       android:height="20dp"
       android:drawable="@drawable/button_pressed" /> <!-- pressed -->
 <item android:state_focused="true"
       android:width="100dp"
       android:height="20dp"
       android:drawable="@drawable/button_focused" /> <!-- focused -->
 <item android:drawable="@drawable/button_normal" /> <!-- default -->