http://zzz.i2p/posts/7163
Tunnel deletion works for me, on an Android phone: select tunnel in list, detail page opens, press delete in action bar, confirm deletion, message pops up (not always showing the "tunnel stopped/deleted" message, I need to come up with an I2PTunnel message design). You're on a Samsung Galaxy Note 2, which IIRC is a tablet. I don't have a tablet and have not tested it. Can you get logs from when the crash occurs?