Just a test app. Do not use in production.

Standard gradle project. Import in Android Studio and build. No special steps needed.

• Handle camera permissions alternative cases
• Handle case when user presses home button in the middle of the capture process
• Capturing photo takes some time, so total time might be slightly more than 5 seconds
• Video capturing could be a better option, but not enough time to implement both to compare
• Photos are encrypted using AES as security is a main concern; key is stored in standard Android keystore
• Targeting Android API 23 to use crypto; if lower version required might need to use different APIs
• File reading logic needs some improvements
• Using ListView to simplify code; in real world app it's probably better to use RecyclerView
• AsyncTask should not reference activity, but to save time it is for the moment
• There are many things that can be improved in the UI, but no time
• Error handling and lifecycle handling needs to be improved as well, but again no time