Prevent random click on other program

[dlintw]

ref: https://android.stackexchange.com/questions/185720/how-to-get-current-foreground-activity-name

it is better to implement a feature inside robotmon to detect is the focus game is running on foreground. If it is not and continue for 3 seconds, Just stop the background script.

[poi5305]

Maybe it is a good idea, but when using EzRobot user may run on different activities robotmon app can not know which activity is right.