Sorry was out of town yesterday. Yeah Android has been weird with widgets. My 3D widget component with “world” space setting is upside down and backwards; however, my UI widget that I attach to the viewport works, so your button should work. Also, I’m not sure if print screen works on android, I tried printing on my phone and it never popped up so you may have to have another form of debugging. If you could provide me some images of your current BP setup for making your UI work I may be able to help with that.
Also, try launching your game to your tablet by clicking the drop-down menu next to the launch button and selecting the “launch manager” option. With your device connected, change “Developement” to “Shipping” and “On the fly” to “By the Book” next to the android launch button. You may also want to change the build to whatever you’re supposed to use for the shield (like ETC1 or ETC2, etc.). This may not help, but its fixed some of my problems in the past. Plus it’s faster than packaging and installing.
To delete and remove the widget, drag a line from the create widget node and type in “destroy”, that will give you a destroy node to get rid of the widget. If this creates clutter just make the output of create widget a variable so you can destroy it later.