Detect power button long press

Question

I\'ve been reading some posts here on Stackoverflow, and I didn\'t find a good solution, I\'m wondering if it\'s possible to detect when the user long press the power button

Answer 1

The method used above by R. Zagórski worked for me very well for a long time, but from some revision of Android 9 the onCloseSystemDialogs method stopped receiving "globalactions".

As a workaround, my app is already using Accessibility. From inside the AccessibilityService you can add this code in onAccessibilityEvent

@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
    Log.i(TAG,"Accessibilityevent");
    if (event == null || event.getPackageName()==null||event.getClassName()==null)
        return;


    if (event.getClassName().toString().contains("globalactions")){
        //TRIGGER YOUR CODE HERE

    }
        ....

Note that were I put the comment "TRIGGER YOUR CODE HERE" I actually just call the same code that was previously in onCloseSystemDialogs.

Note that so far this is only tested to be working on a Pixel 2 running latest Android. I do not have any other phones running a recent enough version so can't test if the solution is sufficiently generic across phones.