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;
}