Hi,

I've recently got into Android development and am writing a basic
podcast app as a learning exercise. I've come up with an issue I can't
find a good solution for. Rather than post code (it's getting big!),
I'll try and summarise:

I have an ExpandableListView showing podcasts and each podcast's
episodes in a simple two-level tree. The podcasts are downloaded in a
Service, and this Service 'sends' messages by using an interface
registered by the main Activity. This interface then uses a handler to
update the UI.

The child views in the ExpandableListView are LinearLayouts with one
TextView and two ViewStubs, one for showing an image and one for
showing a horizontal ProgressBar. These layouts are created if needed
in my extended BaseExpandableListAdapter's getChildView, or reused by
using the convertView supplied.

This all works fine and I'm happy with the overall model, except that
I can't figure out how to update a download's ProgressBar efficiently
when the Activity receives a callback from the Service. How do I get a
reference to the correct View to set its progress?

I've tried keeping a cached HashMap to track which episode currently
has which View instance, but this didn't work due to me recycling the
Views via convertView - I found that when more than one download is
active the two bars can swap values back and forth.

Any help would be appreciated.

Thanks,

Neil

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