Is there a case where the Back button does something when on the Launcher? Is there a reason not to disable it when on the Launcher?
I'm designing a customized version of Android. I'm replacing the Android Navigation Bar with a custom implementation.
I had originally intended to visually disable the 'back' button when on the Home screen (the Launcher), under the belief that it never does anything there. Then a coworker pointed out that the Back button is never disabled on his device...even when it does nothing on the home screen.
And then with frantic clicking on various things he was able to create one scenario where he got to the launcher and clicking on Back did something (took him back into an application). However, we could not reproduce that scenario. Now I question whether it actually occurred.
So, I'm trying to understand:
- Is there a situation in Android where the Back button does something when on the Home/Launcher screen?
- If not, is there a reason to show it in an enabled state while on the Home/Launcher?