I built a JSON editor for Android a while back as part of a tool for kicking off AWS Lambda functions. I was planning on pulling the JSON editor to it's own reusable package, but lost momentum. I imagine it could be useful in many sorts of apps that use JSON.

https://play.google.com/store/apps/details?id=com.alexsci.an...

https://github.com/ralexander-phi/android-aws-lambda-runner