A helper method that enables an Android GridView to be used inside a vertical ScrollView

android_fullheight_gridview.java

/* Inspired by https://stackoverflow.com/a/27818661/3112139 */
public static void justifyListViewHeightBasedOnChildren (GridView listView) {
    ListAdapter adapter = listView.getAdapter();

    if (adapter == null) {
        return;
    }
    ViewGroup vg = listView;
    int totalHeight = 0;
    for (int i = 0; i < adapter.getCount(); i++) {
        View listItem = adapter.getView(i, null, vg);
        listItem.measure(0, 0);
        totalHeight += listItem.getMeasuredHeight();
    }

    ViewGroup.LayoutParams par = listView.getLayoutParams();
    par.height = totalHeight + (listView.getVerticalSpacing() * adapter.getCount());
    listView.setLayoutParams(par);
    listView.requestLayout();
}