How Snapchat detects when screenshot is taken (Hypothesis)
While my friend was playing “That Level Again” game he mentioned there was a level in between when he had to take screenshot of Game Screen to pass that level (Weird right!). As I know a little bit about Mobile Development I thought they might be having some special permission to do so. To be sure I went ahead and asked to see all the permissions that game app was taking and it was just taking READ_STORAGE_SPACE permission. Then he mentioned that Snapchat also detects when you take screenshot of some other person’s story/chat, it notifies that person that you took a screenshot. That’s violating the rights of a stalker. And you could do that in your App too. Now lets see HOW! ...