Great idea on pressing button while holding another with a finger for Android

[beloncfy]

Hi
PPSSPP is great on android however some of the games are not really "playable" due to the nature of on screen button behavior. I'm not able to holding one button while pressing another with a finger which is i always did on the controller.

The game i'm always playing requires to hold the "fly" button and firing with another button, however it is unable to do it on android onscreen control easily.

I'm curious why not implement a feature such as "Hold to lock", like holding the button for 1sec(or can be customized) to trigger the locking and release it by pressing it again?

alternatively, what about dragging the button (such as L R X O ...) and draw a L shape to trigger locking , and press again to release while no longer needed?

Any more great idea?