About a month ago I received Google Glass and only last weekend I found time for developing something for it. I don’t have a lot of experience in developing software for android, so I’ve started developing simple TODO application.
As a language I selected scala (but I think I should try to write similar application in clojure) and gradle as a build system (because it works out of the box with Android Studio).
For integrating scala and gradle I’ve used gradle-android-scala-plugin
which works perfectly and requires adding only ~10 lines to build.gradle for configuration.
And I used scaloid — it’s a very great library, it makes work with android API less painful and makes code a bit more Scala-style.
Developing in scala for android is fun, but I stumbled over one not straightforward problem (perhaps it’s straightforward for mature android developers) — compilation fails with:
[info] Generating classes.dex
[warn]
[warn] trouble writing output: Too many method references: 181232; max is 65536.
[warn] You may try using --multi-dex option.
[warn] References by package:
...
And the simple solution — change my proguard config to:
-dontoptimize
-dontobfuscate
-dontpreverify
-dontwarn scala.**
-keep class scala.collection.SeqLike {
public protected *;
}
-ignorewarnings
Another minus it’s compile time. My simple application compiles around 1.5 minutes, tests — around 1 minute. But I found that incremental compilation will be available soon in gradle-android-scala-plugin, so this minus will disappear.
Source code of result, video of result: