Android - Intercept and pass on all touch events

user_236743 0
Viewed 39739

I have an overlay ViewGroup that is the size of the screen which I want to use to show an effect when the user interacts with the app, but still passes the onTouch event to any underlying views.

I am intrested in all MotionEvents (not just DOWN), so onInterceptTouchEvent() does not apply here as if i return true my overlay will consume all events, and if false will only receive the DOWN events (the same applys to onTouch).

I thought I could override the Activitys dispatchTouchEvent(MotionEvent ev) and call a custom touch event in my overlay, but this has the effect of not translating the input coords depending on the position of my view (for example all events will pass appear to be happening 20 or so px below the actual touch as the system bar is not taken into account).

events android
5 Answers

I tried all of the solutions in the above answers however still had issues receiving all touch events while still allowing children views to consume the events. In my scenario I would like to listen in on events that a child views would consume. I could not receive follow up events after a overlapping child view started consuming events.

I finally found a solution that works. Using the RxBinding library you can observe all touch events including events that are consumed by overlapping children views.

Kotlin Code snippet

RxView.touches(view)
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe(

        object  : Observer<MotionEvent> {
            override fun onCompleted() {
            }

            override fun onNext(t: MotionEvent?) {
                Log.d("motion event onNext $t")
            }

            override fun onError(e: Throwable?) {
            }
        }
    )

See here and here for more details.

user_76025980
Related