An android application with collapsible navigation bars for a full screen activity

There is also a medium article written by me on this same thing. https://pa1tirumani.medium.com/how-to-get-your-activity-to-occupy-full-screen-on-android-9df99b641185

Introduction

The Visibility flags that are employed in achieving various levels of full screen activity

• SYSTEM_UI_FLAG_FULLSCREEN: Hide the status bar
• SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN: Let the layout expand into status bar
• SYSTEM_UI_FLAG_LAYOUT_STABLE: Avoid abrupt layout changes during toggling of status and navigation bars
• SYSTEM_UI_FLAG_HIDE_NAVIGATION: Hide the navigation bar
• SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION;: Let the layout expand into navigation bar

The Theme Attributes employed in achieving various levels of full screen activity

• windowActionBar: Set to false to remove the action bar
• windowNoTitle: Set to true to remove the annoying window title
• android:windowLayoutInDisplayCutoutMode: Set to shortEdges to let the layout expand to the front camera notch in both portrait and landscape modes

I have added the commits sequentially increasing the level of full screeness. You can track the corresponding changes and their effects below

Removal of Action Bar

• commit: https://github.com/pavan142/FullScreenExperiments/commit/2c004dae7e611555b0c442391cebcf4ab4cdffa3
  
  

Removal of Status Bar

• commit: https://github.com/pavan142/FullScreenExperiments/commit/28e3f51d400d70bb9ab706ed30b5d280878de5e0
  
  

Expansion to Status Bar

• commit: https://github.com/pavan142/FullScreenExperiments/commit/0113c0f859b16a33599b7e5e91f5146b34626491
  
  

Removal of Navigation Bar

• commit: https://github.com/pavan142/FullScreenExperiments/commit/05368306a41de20f60278e7aa2813717f0fc6c19
  
  

Toggle Visibility of Bars

• commit: https://github.com/pavan142/FullScreenExperiments/commit/7d01e87bbc140965d01aa84f43502dc993635461