Ссылки из курса Android Basics
Part 5. Networking
JSON Formatter
https://jsonformatter.curiousconcept.com/
http://jsonprettyprint.com/
Threads
https://developer.android.com/guide/components/processes-and-threads?utm_source=udacity&utm_medium=course&utm_campaign=android_basics
https://developer.android.com/training/articles/perf-anr?utm_source=udacity&utm_medium=course&utm_campaign=android_basics