B4J Question Auto shutdown app after idle

le_toubib said:

I tried to reset a timer on mouse move .. but the app crash ...

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You need to provide more information. What did your code do? Why it crashed?

Create a timer that ticks every 10 seconds. Store the current time in a global variable in the MouseMove event. Check whether x seconds have passed in the timer tick event.

On windows, you can use this class https://www.b4x.com/android/forum/threads/jwin32idletime-get-users-idle-time-windows.40210/ to get the idle time. The idle time stops counting when the user presses the keyboard or moves his mouse