how to set google map fragment inside scroll view

Question

I want to set a Google map fragment inside vertical ScrollView, when I do the map does not zoom vertically, how can I override the touch event listener on

Answer 1

This is the Kotlin version of Alok Nair's answer, I have to say that I am relatively new writing Kotlin code, any comment is appreciated.

Custom SupportMapFragmet:

class FocusMapFragment: SupportMapFragment() {
    var listener: OnTouchListener? = null
    lateinit var frameLayout: TouchableWrapper

    override fun onAttach(context: Context) {
        super.onAttach(context)

        frameLayout = TouchableWrapper(context)
        frameLayout.setBackgroundColor(ContextCompat.getColor(context, android.R.color.transparent))
    }

    override fun onCreateView(inflater: LayoutInflater, viewGroup: ViewGroup?, bundle: Bundle?): View? {
        val layout = super.onCreateView(inflater, viewGroup, bundle)

        val params = ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)
        (layout as? ViewGroup)?.addView(frameLayout, params)

        return layout
    }

    interface OnTouchListener {
        fun onTouch()
    }

    inner class TouchableWrapper(context: Context): FrameLayout(context) {
        override fun dispatchTouchEvent(event: MotionEvent?): Boolean {
            when (event?.action) {
                MotionEvent.ACTION_DOWN, MotionEvent.ACTION_UP -> listener?.onTouch()
            }
            return super.dispatchTouchEvent(event)
        }
    }
}

Then change the fragment class in the xml:

android:name="packagename.FocusMapFragment"

And finally when you initialize the map:

override fun onMapReady(googleMap: GoogleMap) {
    this.googleMap = googleMap

    (childFragmentManager.findFragmentById(R.id.mapView) as? FocusMapFragment)?.let {
        it.listener = object: FocusMapFragment.OnTouchListener {
            override fun onTouch() {
                scrollView?.requestDisallowInterceptTouchEvent(true)
            }
        }
    }
    // ...
}

I tested this code in API 28 and 29, I couldn't find a Kotlin version anywhere so thought it could be useful for somebody.