title: Custom File Format not recognized on device
body: <p>I have a custom file format (<code>.ft</code>) in my android app that i registered in my manifest as an intent filter for some activity as</p>
  
  <pre><code>&lt;intent-filter&gt;
      &lt;action android:name="android.intent.action.VIEW" /&gt;
      &lt;action android:name="android.intent.action.EDIT" /&gt;
  
      &lt;category android:name="android.intent.category.DEFAULT" /&gt;
  
      &lt;data
           android:host="*"
           android:mimeType="application/ft"
           android:scheme="content" /&gt;
  
  &lt;/intent-filter&gt;
  </code></pre>
  
  <p>In the simulator, I am able to tap on the file (for instance when it is being set via email), and the app launches, as expected.</p>
  
  <p>However recently I have been packaging my app as an APK and distributed this for some testing, and on no device the file format is recognized, even though my app is installed … Is there anything I am missing to register the file format?</p>
  
  <p><strong>Update</strong>
  After fiddling around a bit more, it appears like I can open these files from Android mail, but they are not recognized from the gmail app or directly from the file system … Odd.</p>