TryDateLibraryofAndroid

Transcript

1. Try Date Library of Android @futabooo
2. futabooo(Takahiro futagawa) - Engineer at eureka, Inc. - Android Developer futabooo futabooo
3. Topics ‣ java.util.Date and java.util.Calendar ‣ Android Date Library ‣ Joda-Time-Android ‣ Date4j ‣ ThreeTenABP
4. java.util.Date java.util.Calendar
5. java.util.Date and java.util.Calendar ‣ The Java classes for handling dates ‣ Have been mostly unchanged since JDK1.0 ‣ And suffer from well-known issues ‣ for example January starts from 0 leading to many off-by-one bugs
6. Joda-Time-Android ‣ Date calculation
7. ‣ Date period Joda-Time-Android
8. Joda-Time-Android
9. Joda-Time-Android ‣ Joda-Time for Android ‣ Joda-Time eases the pain and tedium of manipulating dates and time ‣ Joda-Time greatly inflates its memory footprint on apps. ‣ Avoids the problem for Android by loading from resources instead of a JAR ‣ Has extra utilities designed for Android
10. Joda-Time-Android ‣ Add the following dependency to build.gradle ‣ Initialize the library before using
11. ‣ Date calculation Joda-Time-Android
12. ‣ Date period Joda-Time-Android
13. Date4j
14. Date4j ‣ Eases the pain and tedium of manipulating dates and time ‣ Different scope from Joda-Time ‣ Number of classes < 10 ‣ Works in tandem with some JDK Date classes ‣ Supports nanosecond resolutions ‣ And more
15. Date4j ‣ Add the following dependency to build.gradle
16. Date4j ‣ Date calculation
17. Date4j ‣ Date period • Ignore hour,minitue,secounds
18. ThreeTenABP
19. ThreeTenABP ‣ An adaptation of the JSR-310 backport for Android ‣ JSR-310 was included in Java 8 as the java.time.* package ‣ Full replacement for the ailing Date and Calendar
20. ThreeTenABP ‣ Add the following dependency to build.gradle ‣ Initialize the library before using
21. ThreeTenABP ‣ Date calculation
22. ThreeTenABP ‣ Date period
23. ·ͱΊ ‣ java.util.Date and java.util.Calendar died ‣ Joda-Time-Android fat ‣ Date4j old ‣ ThreeTenABP cool Let’s use ThreeTenABP
24. ࢀߟจݙ ‣ https://dzone.com/articles/game-over-jdks-date-and-time-c ‣ http://www.joda.org/joda-time/ ‣ https://github.com/dlew/joda-time-android ‣ http://blog.danlew.net/2013/08/20/joda_time_s_memory_issue_in_android/ ‣ http://www.date4j.net/ ‣ https://github.com/JakeWharton/ThreeTenABP ‣ https://twitter.com/jakewharton/status/606158843249364993
25. Thank you Credit: NASA Earth Observatory/NOAA NGDC