Is it possible to enable touch events for a View inside a ViewGroup but outside its bounds?

Question

I'm currently trying to design a ViewGroup (specifically a subclass of FrameLayout) that can layout any number of subviews and enable them for drag/drop outside the layout group. It's almost identical to a LinearLayout:

Curently I am able to drag the views outside the ViewGroup and draw them, however after letting go of the view it can't be re-selected and further dragged around.

I'm wondering if there is a way to do this in a way that isolates the logic to the Layout subclass and doesn't involve needing to do much/any extra stuff in consuming fragments/view groups.

I've tried overriding getHitRect(Rect) in my FrameLayout subclass but it never seems to be called. dispatchTouchEvent(MotionEvent) is of course not called either, presumably because the parent ViewGroup has decided not to deliver the touch to it because it was outside the bounds. I've tried implementing a TouchDelegate as well, but I think that needs to be set on the parent view, which means needing to know about this and doing this additional step when using this Layout.

Any ideas on if/how this is possible? On iOS it can be implemented fairly easily by overriding hitTest: to take into account the frames of the child views. Is there a similar method like this on Android?

Your help is greatly appreciated!

Answer 1

没有任何代码，很难看到您在做什么，但是最好的猜测是每个视图都应该是相对布局的子视图。