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

You can use NonScrollExpandableListView you can achieve non-scroll property of any Lisview or GridView or ExpandableListView by overriding following method.

@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    int heightMeasureSpec_custom = MeasureSpec.makeMeasureSpec(
            Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
    super.onMeasure(widthMeasureSpec, heightMeasureSpec_custom);
    ViewGroup.LayoutParams params = getLayoutParams();
    params.height = getMeasuredHeight();
} 

So for using NonScrollExpandableListView you need to make one custom class.

public class NonScrollExpandableListView extends ExpandableListView {

    public NonScrollExpandableListView(Context context) {
        super(context);
    }

    public NonScrollExpandableListView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public NonScrollExpandableListView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int heightMeasureSpec_custom = MeasureSpec.makeMeasureSpec(
                Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, heightMeasureSpec_custom);
        ViewGroup.LayoutParams params = getLayoutParams();
        params.height = getMeasuredHeight();
    }
}

And use it like.

<com.example.extraclasses.NonScrollExpandableListView 

    android:layout_width="match_parent"
    android:layout_height="wrap_content" /> 

Happy coding.

Add android:nestedScrollingEnabled="true" to your ExpandalbleListView layout.

Use this method this will calculate the ExpendableListSize at run time.

 private void setListViewHeight(ExpandableListView listView,
                               int group) {
    ExpandableListAdapter listAdapter = (ExpandableListAdapter) listView.getExpandableListAdapter();
    int totalHeight = 0;
    int desiredWidth = View.MeasureSpec.makeMeasureSpec(listView.getWidth(),
            View.MeasureSpec.EXACTLY);
    for (int i = 0; i < listAdapter.getGroupCount(); i++) {
        View groupItem = listAdapter.getGroupView(i, false, null, listView);
        groupItem.measure(desiredWidth, View.MeasureSpec.UNSPECIFIED);

        totalHeight += groupItem.getMeasuredHeight();

        if (((listView.isGroupExpanded(i)) && (i != group))
                || ((!listView.isGroupExpanded(i)) && (i == group))) {
            for (int j = 0; j < listAdapter.getChildrenCount(i); j++) {
                View listItem = listAdapter.getChildView(i, j, false, null,
                        listView);
                listItem.measure(desiredWidth, View.MeasureSpec.UNSPECIFIED);

                totalHeight += listItem.getMeasuredHeight();

            }
        }
    }

    ViewGroup.LayoutParams params = listView.getLayoutParams();
    int height = totalHeight
            + (listView.getDividerHeight() * (listAdapter.getGroupCount() - 1));
    if (height < 10)
        height = 200;
    params.height = height;
    listView.setLayoutParams(params);
    listView.requestLayout();

}

An call this method in your setOnGroupClickListener.like below

mExpandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
        @Override
        public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {

            setListViewHeight(parent, groupPosition);
            return false;
        }
    });