onTouchListener warning: onTouch should call View#performClick when a click is detected

Question

I have created a onTouchListener. Unfortunately onTouch() method throws me a warning:

com/calculator/activitys/Calculat         


        

Answer 1

I had a similar issue with a MultiTouchListener and solved it implementing a GestureDetector and listening for a SingleTap (This does not remove the warning but starts to triggering onClick events on my view)

class TouchListener(context: Context) : MultiTouchListener() {

    private var tochedView: View? = null
    private var mGestureDetector = CustomGestureDetector()
    private var gestureDetector: GestureDetector = GestureDetector(context, mGestureDetector)

    @SuppressLint("ClickableViewAccessibility")
    override fun onTouch(view: View?, event: MotionEvent?): Boolean {
        val aux = super.onTouch(view, event)

        tochedView = view
        gestureDetector.onTouchEvent(event)

        return aux
    }

    private inner class CustomGestureDetector: GestureDetector.SimpleOnGestureListener() {

        override fun onSingleTapUp(e: MotionEvent?): Boolean {
            // this will be called even when a double tap is
            tochedView?.performClick()
            return super.onSingleTapUp(e)
        }

        override fun onSingleTapConfirmed(e: MotionEvent?): Boolean {
            // this will only be called after the detector is confident that the
            // user's first tap is not followed by a second tap leading to a double-tap gesture.
            tochedView?.performClick()
            return super.onSingleTapConfirmed(e)
        }

    }

}