为什么我的应用程序无法找到新拍摄的图像？

My app allow user to take picture and immediately so it in the gallery (all pictures in external storage). However, I couldn't view my newly taken picture in the gallery. I am sure the picture is taken, as I can view it in file manager. And the path is correct. Why can't my app recognize the picture it just took. What do I miss?My app allow user to take picture and immediate