I have started a download using Icon Downloader for NT that doesn't look like it will ever finish. In my notification area, it has survived two reboots and the uninstallation of the app. How can I get rid of it?
The simple way to cancel a download in Android Lollipop is to disconnect from any internet connection, ie turn off WiFi or mobile data. Another method would be to enable airplane mode; either methods would cause the files to timeout. Then you could delete the partially downloaded file..