How to make your Android app open xml files?

Hi, I would like to associate my game with xml files, so when I try to open one on my Android mobile (through file browser or email attachments) my game would be in the list of available apps to do it. This looks like a very basic question to me, however I can't find a proper answer. I found several related topics on different forums/blogs but nothing that explains exactly how to do it. My best shot is to add an intent filter in my AndroidManifest.xml file: But it doesn't work... so right now I'm lost as I don't know if there's something wrong in my filter, or if it's not at the right place in the manifest, or if I'm simply missing something asside from that. Thanks for your help, any input would be great! Here's my complete manifest file: