popupwindow 设置图片度

直接设置pupupwindow 所引用的view的透明度便可

            如

                       LayoutInflater layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);

popupMoreMenuView = layoutInflater.inflate(R.layout.test);

popupMoreMenuWindow = new PopupWindow(popupMoreMenuView,

LinearLayout.LayoutParams.WRAP_CONTENT,

LinearLayout.LayoutParams.WRAP_CONTENT);

popupMoreMenuView.setAlpha(0.9f);//90%透明度