android PopupWindow

/**
     * 设置PopupWindow
     * @param anchor
     * @param view
     * @param popupWindow
     * @return
     */
    private static PopupWindow setPopupWindow(View anchor, View view, PopupWindow popupWindow) {
        popupWindow = new PopupWindow(view, anchor.getWidth(), android.view.ViewGroup.LayoutParams.WRAP_CONTENT);
        popupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        popupWindow.setOutsideTouchable(true);
        popupWindow.setFocusable(true);
        popupWindow.showAsDropDown(anchor);
        return popupWindow;
    }