I'm trying to code application using React Native and Expo. In my app should be a page in which are displayed photos from gallery. My problem is that the page have to be kept updated. To the mobile will be connected external camera and after taking photo, photo will be inserted to phone's photo gallery. Then I need to recognize some way that in the gallery is new photo. Is there some event or something like that which can trigger my update-function? Thanks for your help.