how do you remove the navigation bar on Android?

Question

When I listen to a YouTube video fullscreen in landscape on my Galaxy Nexus, the navigation bar on the right disapear after a few seconds (the bar which contains the "back&

Answer 1

This code will hide the navigation bar until you swipe down from the status bar. It's the same method that Jetpack Joyride uses:

View decorView = getWindow().getDecorView(); 
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
decorView.setSystemUiVisibility(uiOptions);

You must also have this in the activity section of your XML file:

android:theme="@android:style/Theme.Holo.Light.NoActionBar.Fullscreen"