如何检测ListPopupWindow显示在锚视图的上方还是下方？

ListPopupWindow listPopupWindow = new ListPopupWindow(context);
// 设置ListPopupWindow的适配器和内容

View anchorView = findViewById(R.id.anchor_view);
int[] anchorLocation = new int[2];
anchorView.getLocationOnScreen(anchorLocation);

DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
int screenHeight = displayMetrics.heightPixels;

int anchorCenterY = anchorLocation[1] + anchorView.getHeight();
int listPopupWindowHeight = listPopupWindow.getHeight();

if (anchorCenterY < screenHeight / 2) {
    // ListPopupWindow显示在锚视图的下方
    listPopupWindow.setAnchorView(anchorView);
    listPopupWindow.show();
} else {
    // ListPopupWindow显示在锚视图的上方
    listPopupWindow.setAnchorView(anchorView);
    listPopupWindow.setVerticalOffset(-listPopupWindowHeight);
    listPopupWindow.show();
}