Ok, this has me frustrated. The good slideshow/gallery apps are already few and far between. But the wanted feature of having the Android show pictures that are stored on my PC, leaves the number of apps to, zero, it seems. I just can't find anything that works.
What I do is I run ushare on my Linux box. A couple of upnp browser apps confirm that they're seeing the ushare, and I can see the files being advertised. Then next, is any gallery app, that can actually access that available content and put on a slideshow.
My Android box is an Android TV box in the living hooked up to the large TV.
If I get fed up, I'll have to slap something together myself. I might concoct a network protocol myself, to give me good control over being able to only transfer what's need to show content... Any thoughts?