Will touch get detected while a View is in invisible state?

Question

I am using a CustomSlider in my app, and I have set it to be invisible.

When the user drags it or touches it (from top to bottom), my application needs to make the slider visible. Is this possible? How would I achieve it?

Answer 1

I needed to do this with an ImageView and still get touch events. The solution was to setAlpha(0.0f) to hide the image and still get events.

Answer 2

The touch event will be detected on the visible Views of your activity. While a View instance is hidden / invisible, you cannot interact with it.

You need a motion handler on the parent view / visible view to determine whether you need to show the slider (in case the motion is vertical) or not.