This is a straight-forward and quick job. I have an app that needs to stay on full screen without the navigation bar and status bar popping, unless they explicitly exit the activity.
Currently, the activity stays on full screen until a popup, or another window appears. The navigation bar will then appear. I want you to completely disable this. I have the code ready, you just need to tweak it until this no longer happens with my activity. Many apps have done this WITHOUT root, and I can also provide examples. This job should take no longer than 2 hours as I have everything ready.