Launch application from gmail app
<p>I have a android application to preview .dst file type,i am able launch the app by clicking on file from the file explorer i did it by following code  </p>

<pre><code>           &lt;intent-filter &gt;
            &lt;action android:name="android.intent.action.VIEW" /&gt;

            &lt;category android:name="android.intent.category.DEFAULT" /&gt;
            &lt;category android:name="android.intent.category.BROWSABLE" /&gt;

            &lt;data android:scheme="file" /&gt;
            &lt;data android:mimeType="*/*" /&gt;
            &lt;data android:pathPattern=".*\\.DST" /&gt;
            &lt;data android:host="*" /&gt;
           &lt;/intent-filter&gt;
</code></pre>

<p>now i need to launch the app from the default gmail app,i think i need to change the 
 android:scheme="file"</p>

<p>tag ,please help me with the proper scheme for gmail application..</p>
