[android-developers] how can i map a touchevent to another area before other app get it ? do i need a root? or it is not possible

i guess it's weird why i pose this question. it's because my phone screen is not working so well ,

and there is a "dead bar" on top of it ,which can't accept any touch event.so i can't use the app with buttons in the "dead bar".

That's why i come up with this idea,may be i can use a floating window, and map the touch event to the dead zone, or even just

get the focus of the button in the "dead bar",and then i can use these app again.

i already know how to implement a floating window which float on the screen,but i don't know how to map this event to another area,

or whether it is possible,do i need a system permission? please help me !!!best thanks.

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