Format attribute value "android:drawable" not valid
<p>I'm trying to create custom attributes to my button but I dont know which format I must use to images in attributes declaration...</p>

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;resources&gt;

    &lt;declare-styleable name="TCButton"&gt;
        &lt;attr name="Text" format="string"/&gt;
        &lt;attr name="BackgroundImage" format="android:drawable"  /&gt;
    &lt;/declare-styleable&gt;


&lt;/resources&gt;
</code></pre>

<p>Error is in the format="android:drawable"...</p>
