Java 8 and Android and You

Let's look at the status of Java 8 in the Android world. How can you use it? What are the limitations? Workarounds? And what is this thing with Jack and Jill anyway?

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Hack & Tell presented at Novoda -> http://novoda.tv
Video: https://www.youtube.com/watch?v=lEwIK3EY2g8

Transcript

1. Sebastiano Poggi java 8 and android and you
2. java 8
3. java 8?
4. yes, but… java 8?
6. java 8 added in android 7.0 no more harmony switched to openjdk partial support* *varies by os version
7. java 8 best case scenario (api 24+) lambdas and method references java.util.function streaming and reflection apis repeatable annotations default and static interface methods
8. java 8 on pre-24 lambdas and method references java.util.function runtime crash! streaming and reflection apis repeatable annotations default and static interface methods
9. jack
11. jack new compiling toolchain no javac/dx, one tool to rule them all .jack bytecode as intermediate language jill handles legacy .class files supports java 8 language features
12. jack? yes, but…
13. jack no .class means no java tooling no *guard, no mockito, no jacoco... no instant run support in alpha since announced and most importantly…
14. DEPRECATED
15. very cool!
16. very cool! yes, but…
17. what does that mean?
18. the future likely to match jack java 8 support language features: partial backport new api: no backport basically like using retrolambda we can keep our tooling
19. under the hood desugarer from bazel backports java 8 features bytecode manipulation anon inner classes for lambdas again, just like retrolambda (ish)
20. source: https://realm.io/news/360andev-jake-wharton-java-hidden-costs-android/
21. …questions