Field mPopup = popupMenu.getClass().getDeclaredField("mPopup");
mPopup.setAccessible(true);
MenuPopupHelper helper = (MenuPopupHelper) mPopup.get(popupMenu);
Class standardMenuPopup = Class.forName("androidx.appcompat.view.menu.StandardMenuPopup");
Field mHasContentWidth = standardMenuPopup.getDeclaredField("mHasContentWidth");
mHasContentWidth.setAccessible(true);
mHasContentWidth.setBoolean(helper.getPopup(), true);
Field mContentWidth = standardMenuPopup.getDeclaredField("mContentWidth");
mContentWidth.setAccessible(true);
mContentWidth.setInt(helper.getPopup(), width);

Field mPopup = popupMenu.getClass().getDeclaredField("mPopup");
mPopup.setAccessible(true);
MenuPopupHelper helper = (MenuPopupHelper) mPopup.get(popupMenu);
helper.show(x, y);

Field mPopup = popupMenu.getClass().getDeclaredField("mPopup");
mPopup.setAccessible(true);
MenuPopupHelper helper = (MenuPopupHelper) mPopup.get(popupMenu);
helper.setForceShowIcon(true);