KlugBlackScreen

<extensions>
    <extensionID>com.klug.blackscreen</extensionID>
</extensions>

import com.klug.blackscreen.BlackScreen;

// once, in the constructor of your main class: from now on the view is redrawn
// whenever the app window gets the focus back, after a permission prompt,
// a dialog, the keyboard or another activity
BlackScreen.getInstance().startAuto();   // a second call has no effect

// iOS, macOS and desktop: isSupported is false and every call does nothing,
// so no platform check is needed. stopAuto() switches it off again (rarely needed).

// call this from the result handler of any system window that covered the app:
// a permission prompt, a share sheet, a native dialog, a sign-in page
function onSystemWindowClosed():void
{
    BlackScreen.getInstance().fix();     // redraw once, no flicker
}

// example: your own permission flow reports back
myPermissionFlow.onResult = function( granted:Boolean ):void {
    onSystemWindowClosed();
    if ( granted ) startCamera(); else showPermissionHint();
};

import flash.desktop.NativeApplication;
import flash.events.Event;

// back from another activity (share sheet, browser, system settings) and fix()
// is not enough on a given runtime build: the stronger redraw may flicker once
NativeApplication.nativeApplication.addEventListener( Event.ACTIVATE, function( e:Event ):void {
    BlackScreen.getInstance().fixHard();
});

// the first fixHard() replaces the launch background of the window with plain white,
// so the short toggle does not show the splash image