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Hiding and showing menu items in an application based on state

Hiding and showing menu items in an application based on state
  1. How to hide and show menu items in android?
  2. How to hide menu bar in android Studio?

How to hide and show menu items in android?

If you want to change the visibility of your menu items on the go you just need to set a member variable in your activity to remember that you want to hide the menu and call invalidateOptionsMenu() and hide the items in your overridden onCreateOptionsMenu(...) method.

How to hide menu bar in android Studio?

On Android 4.1 and higher, you can set your application's content to appear behind the navigation bar, so that the content doesn't resize as the navigation bar hides and shows. To do this, use SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION .

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