Show local time on/Off + Device Time Zone Change

[Pluu]

Issue

• https://github.com/DroidKaigi/conference-app-2017/issues/198

Overview (Required)

Session#stime / Session#etime changes from Date to ZonedDateTime. Since Date has GMT, it turned out that the value changes depending on the time zone of the device.

https://github.com/DroidKaigi/conference-app-2017/issues/198#issuecomment-280082697

So we added processing below.

• Add, com.jakewharton.threetenabp:threetenabp:1.0.5
• Custom Gson registerTypeAdapter (String <-> ZonedDateTime)
  • ZonedDateTime is fixed Asia/Tokyo TimeZone
• Custom orma annotation.StaticTypeAdapter (String <-> ZonedDateTime)
  • ZonedDateTime is fixed Asia/Tokyo TimeZone

By using the above, Session#stime / Session#etime certainly maintains the state of Asia/Tokyo.

Also, we will process it using the current location on/off and timezone in LocaleUtil#getDisplayDate. Please note that GMT is forcibly modified by time zone.

I'm sorry. The commit log became cluttered due to various trials. 🙇 🙇 🙇

Links

Screenshot

Before	After
	https://youtu.be/XAu4TpAg4hI

[konifar]

:eyes:

[konifar]

Thanks for contribution! 😄 Sorry, let me consider we should localize this app or not. Because we will have to think localization during development. I guess it's hard for the contributors. I'll reply by evening!

[Pluu]

it's ok. Is only PR as a way to solve issue.

[konifar]

Sorry to be late 🙇 I'll review this tonight!

[Pluu]

^^ no problem