can't load android virtual device
<p>when i want to use AVD there is an error:</p>

<pre><code>[Dex Loader] Unable to execute dex: Multiple dex files define    
Lcom/willis/layout/Client_layoutActivity$1;
[client_layout] Conversion to Dalvik format failed: Unable to execute dex: Multiple dex files define Lcom/willis/layout/Client_layoutActivity$1;
</code></pre>
