Android - NestedScrollView which contains ExpandableListView doesn't scroll when expanded

Question

I have an ExpandableListView inside a NestedScrollView (yes I know, it is not good to have a scrolling view inside another scrolling view but I don

Answer 1

The answer from V-rund Puro-hit is what worked for me. But it took some modifications to work with Kotlin supporting API >19. So for the purpose of saving someone time, here it is:

Create a new class file NonScrollExpandableListView:

import android.content.Context
import android.util.AttributeSet
import android.widget.ExpandableListAdapter
import android.widget.ExpandableListView


class NonScrollExpandableListView : ExpandableListView {

    constructor(context: Context) : super(context) {}

    constructor(context: Context, attrs: AttributeSet) : super(context, attrs) {}

    constructor(context: Context, attrs: AttributeSet, defStyle: Int) : super(context, attrs, defStyle) {}

    override fun setAdapter(adapter: ExpandableListAdapter?) {
        super.setAdapter(adapter)
    }

    override fun setOnChildClickListener(onChildClickListener: OnChildClickListener) {
        super.setOnChildClickListener(onChildClickListener)
    }

    override fun expandGroup(groupPos: Int) : Boolean {
        return super.expandGroup(groupPos)
    }

    override fun expandGroup(groupPos: Int, animate: Boolean) : Boolean {
        return super.expandGroup(groupPos, animate)
    }

    override fun isGroupExpanded(groupPosition: Int): Boolean {
        return super.isGroupExpanded(groupPosition)
    }

    public override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
        val heightMeasureSpec_custom = MeasureSpec.makeMeasureSpec(
                Integer.MAX_VALUE shr 2, MeasureSpec.AT_MOST)
        super.onMeasure(widthMeasureSpec, heightMeasureSpec_custom)
        val params = layoutParams
        params.height = measuredHeight
    }
}

...and I use it like so:

As a result, I can comfortably add buttons and other elements to NavigationView side drawer) and it all works nicely in one common ScrollView. Main usage here is when you need to combine multiple ListViews and ExpandableListViews inside the one common ScrollView which would take care of scrolling.