Add link/etc for Java to README about deprecated-crosswalk-apk-generator

[townxelliot]

It's likely you have some kind of jdk installed, otherwise you wouldn't have javac (to compile .java files), jarsigner (which make_apk.py uses), or tools.jar (which ant uses).

JAVA_HOME is usually necessary to tell Ant where your Java install is. There may be some other voodoo going on in your setup so that Ant can find Java, but if you install from a tarball (which is the most consistent way to do it cross-platform in my opinion) you have to set JAVA_HOME yourself.

I think the instructions suggest "Java JDK". It might be worth saying instead "Oracle JDK" (and remove the piece about JAVA_HOME) , then it doesn't matter how you set it up as long as it works. (And Ant can find it.)

The scripts do actually check whether you've got all the tools and they're all working before they will do a build, so you could just give it a go and see what happens :) Though they enforce the use of the Oracle JDK, as I've seen it mentioned that gcj doesn't work well with Android.

[davidmaxwaterman]

It suddenly occurred to me to look in the most obvious place - since javac and jarsigner are both in /usr/bin - and indeed it is installed via dpkg :

ii oracle-java7-installer 7u45-0webupd80 all Oracle Java(TM) Development Kit (JDK) 7

I don't have JAVA_HOME set - obviously not needed for javac and jarsigner, but I'm not sure how it can find tools.jar (and my memory is telling me that this has been an issue for me in the past...).

I'll see how far I can get.

[townxelliot]

Should we close this now, or do you think we need to add the links still?

[davidmaxwaterman]

close, I think...perhaps it will end up in an faq at some point.