各位大神-关于背景颜色的有关问题

各位大神---求助关于背景颜色的问题
main,.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:background="@drawable/grey"
  >
<TextView  
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content" 
  android:text="@string/hello"
  />
</LinearLayout>


color.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
  <drawable name="darkgray">#808080FF </drawable> 
  <drawable name="white">#FFFFFFF</drawable>
 </resources> 

没报错跑起来背景还是没变，这是为什么呢

[解决办法]
color.xml放在res/values下

XML code

<?xml version="1.0" encoding="utf-8"?><resources>  <drawable name="darkgray">#808080FF </drawable>    <drawable name="white">#FFFFFFFF</drawable> </resources>
[解决办法]
探讨

color.xml放在res/values下

XML code

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <drawable name="darkgray">#808080FF </drawable>  
  <drawable name="white">#FFFFFFFF</drawable>
 </resour……