void _pickImage() { var imageUrl = this.widget.urls[this.currentIndex]; var imagePath = SQLiteDBManager.instance.GetCachedFilePath(imageUrl); if (imagePath.isEmpty()) { return; } var items = new List <ActionSheetItem> { new ActionSheetItem( "保存图片", onTap: () => { if (imagePath.isNotEmpty()) { var imageStr = CImageUtils.readImage(imagePath); PickImagePlugin.SaveImage(imagePath, imageStr); } } ), new ActionSheetItem("取消", type: ActionType.cancel) }; ActionSheetUtils.showModalActionSheet(new ActionSheet( title: "", items: items )); }