Drive:******Android-sdksamplesandroid-<apilevel>ApiDemossrccomexampleandroidapisviewExpandableList1.java

TextView desc = (TextView) v.findViewById(R.id.editText1);
            ImageView icon = (ImageView) v.findViewById(R.id.listIcon);
            if (desc.getVisibility() == View.VISIBLE) {
               icon.getLayoutParams().height = heightIcon;
               desc.setVisibility(View.GONE);
            } else {
               icon.getLayoutParams().height = LayoutParams.FILL_PARENT;
               desc.setVisibility(View.VISIBLE);
        }