How to create a photo sharing activity?
<p>How can I create a custom activity that can be chosen by the user via the share option when viewing the photo gallery? I have options like "Share with Facebook, Twitter, FlickR" etc. But I want to add my own option in there.</p>

<p>i.e. Go to "Photos", then click the "Share" button. You will be presented with a bunch of share providers. What do I need to do to get my activity in there?</p>
