Android O feature spotlight: Android tells you if an app is displaying a screen overlay

Being able to run apps that draw on top of other apps is a powerful feature of Android. Apps like Twilight take advantage of that to add a filter to the display, but other apps just show a floating UI element. However, this can also be a security concern. Android O offers a handy alert when an app is showing an overlay with a link to turn it off.

Whenever you start an app with an active screen overlay, Android O generates a notification that tells you "[App] displaying on top." This notification is collapsed into a single line, but you can expand it for more detail.

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Android O feature spotlight: Android tells you if an app is displaying a screen overlay was written by the awesome team at Android Police.

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