RubyMotion Android: can't convert java.util.HashMap to Ruby Hash

rm-android-hash.rb

 # Update: there's an issue open in RubyMotion for this, so hopefully it will get resolved soon.
 #
 # http://hipbyte.myjetbrains.com/youtrack/issue/RM-725
 #
 # In the meantime, here's a workaround: https://gist.github.com/darinwilson/26c8b573a65d8bc4c64b
 
 # if you create a Ruby Hash...
 ruby_hash = { foo: "bar" }
 # ...you can call Ruby methods...
 ruby_hash.has_key?(:foo)
 # ...and java.util.HashMap methods
 ruby_hash.containsKey(:foo)

 # but if you create a Java HashMap...
 hash = Java::Util::HashMap.new
 hash.put("foo", "bar")
 # you can't call Ruby methods
 hash["foo"] # <- raises com.rubymotion.NoMethodError