How to replace the standard camera on android?

Question

Android

You need to replace the standard camera application with another one that emulates shooting, but takes a photo from the gallery

Answer 1

If an app calls a third party camera app in order to take a photo, then you need an app that has the appropriate intent filter in its manifest: https://developer.android.com/training/camera/phot...
Then you can choose it from the list when you try to take a photo.
If the application uses the camera api internally, then it will not work without root.