Re: [xmlvm-users] xmlvm newbie needs help

[Erez D <ere...@gm...>]

thanks for replying,

I am  an N900 user, a goal of mine is to have many more applications for me
and any other N900 users.
As I saw XMLVM can be used to translate android apps to iphone, i thought i
could use XMLVM to translate android apps to the N900 as well.
The N900 runs on a pseudo debian system, so making a native c+gtk or c+qt
app will probably suffice.

as a first step, i wanted to see if i could translate an application ( and
took xokoban as an example ) to run under ubuntu, and later the  N900.

I read the XMLVM documentation, I got the idea, but some examples/tutorials
could have helped me.


i did 'ant clean' and then 'ant' and everything was built ok,
then i did:
cd xmlvm/trunk/xmlvm/demo/android/xokoban/src/org/xmlvm/demo/xokoban
javac Ball.java

and got:

Ball.java:27: cannot find symbol
symbol: class MovableGamePiece
public class Ball extends MovableGamePiece {
                          ^
Ball.java:28: cannot find symbol
symbol  : class GameView
location: class org.xmlvm.demo.xokoban.Ball
    public Ball(GameView view, int tileSize, int x, int y) {
                ^
Ball.java:34: package R does not exist
            return R.drawable.ball_20;
                    ^
Ball.java:36: package R does not exist
            return R.drawable.ball_30;
                    ^
Ball.java:38: package R does not exist
            return R.drawable.ball_100;

still need help getting started here.


thanks,
erez.

On Mon, Mar 28, 2011 at 5:59 PM, Paul Poley <bay...@gm...> wrote:

> XMLVM will translate Java code to Objective-C or C, but not C++.  This is
> good though since C++ is an extension of C.
>
> As you say you are a C++ programmer looking to translate Xokoban to C++,
> I'm not sure XMLVM is what you're looking for.  I.e. the idea is to write
> code in Java & it will work the same running as Objective-C or C++, but you
> shouldn't have to look at the Objective-C or C++ code, barring some
> exceptions.  If you do look at the generated code, you can easily tell a
> human didn't write it, although with some XMLVM knowledge, you can read &
> understand it.
>
> That to say, if you are interested in writing C++, XMLVM is probably not
> the solution.  If however, you are interested in writing Java, you've come
> to the right place.
>
> To answer your question, Java source files are *.java.  When you compile
> them using "javac", they are converted into *.class.  Those byte code files
> (think of them in some ways similar to *.exe) are what the JVM executes in
> Java proper & what XMLVM uses to translate to another language.
>
> So if you are interested in XMLVM, I recommend first acquainting yourself
> with Java proper.
>
> Possibly to get you started though, run "ant clean" first to get rid of
> some old files that may be causing 'package R does not exist'.
>
> Thanks,
> Paul
>
>
> On Mon, Mar 28, 2011 at 4:16 AM, Erez D <ere...@gm...> wrote:
>
>> I have just checked out xmlvm, and want to use it to compile android app
>> to c++
>> I read the documentation, but still have problems understanding what to
>> do.
>>
>> i have generated dist/xmlvm.jar using ant and openjdk
>>
>> BTW, I'm a c++ programmer, with small experiance  in java.
>>
>> For example, i need help compiling xokoban (from xmlvm demo) to c++
>> 1. according to the docs, xmlvm's input is *.class, but xokoban files are
>> *.java.  do i just use javac to compile xokoban.java to xokoban.class (this
>> will make java bytcode. is it ok or dex is needed ? (if so, how do i
>> generate dex ?) )
>> 2. trying 'javac Ball.java' from xokoban's directory: i get many error
>> messages of missing stuff, like 'package R does not exist'. is this because
>> of the order i am compiling or am i missing somthing.
>>
>>
>> can someone give me a small tutorials of how to generate c/cpp from
>> xokoban (ubuntu 10.10 64 bit).
>>
>> thanks,
>> erez.
>>
>>
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