Overriding onBackPressed() (the Back Button)
Learn how to override the onBackPressed() method in Android to require the user to press the back button twice to exit the app, or prevent them from exiting the app using the back button.
When the user presses the back button on their device, the onBackPressed() method is called. By overriding this method, you can change what happens when the user presses the button such as requiring them to press it twice before exiting the app or preventing them from exiting at all by pressing the back button.
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Timestamps
0:00 onBackPressed() function
0:25 Stop back button from exiting app
0:53 Demo 1
1:02 Press twice to exit app
1:39 Demo 2