android is there a way to take screenshot of home and other apps that are not yours programmatically?

Question

I already made a button to be overlaid in the system window, only thing is I don't know how to take screenshot programmatically from that button to take screenshot of home screen or any other screen (not my activity).

What I want is how to programmatically run the combo keys to initiate the screenshot? (like pressing both power and volume down key at the same to take screenshot)

I know using adb command required root (which I don't want to) , you can using getrootview but only inside your own activity (which I don't want to) .

Answer 1

从Android Lollipop （5.0）开始，您可以使用MediaProjection截屏。