Good idea Luciano : )
What we should copy to this branch? SCA modules and calculator sample? I
think it's enough to start experiment SCA on Android
I sent a msg to Android Developers list, lets wait for the response : )
Regards,
Adriano Crestani
On Fri, Mar 14, 2008 at 7:11 PM, Luciano Resende <[EMAIL PROTECTED]>
wrote:
> Good summary Adriano, I haven't had success yet trying to run
> Calculator sample application on the Android environment. Below are
> some issues I noted
>
> - Looks like our calculator sample dependency has grown out of
> control, and is now requiring node, databinding, axiom, etc
> - The service locator pattern we use for our extension mechanism is
> not working correct in Android environment causing various NPE
> - etc
>
> What do you think if create a branch to experiment and try to work on
> these issues together ?
>
>
> On Fri, Mar 14, 2008 at 2:13 PM, Adriano Crestani
> <[EMAIL PROTECTED]> wrote:
> > Hi,
> >
> > Luciano and me have been trying to run the SCA calculator sample on the
> > Google Android platform, that is a platform for mobile devices. As the
> > Android platform apps are written in Java language, we tried to run the
> Java
> > SCA calculator sample on it.
> >
> > Although the apps for Android are coded in Java, it's only coded in
> Java
> > language. When it's compiled, it generates not .class files, but a file
> > called .dex, that is equivalent to .jar files. The .dex files are not
> > compound of Java standard bytecode, but a special bytecode that is
> intended
> > to run only on Android VM: Dalvik.
> >
> > So, in our first try to compile the calculator sample, only importing
> the
> > needed SCA jars were not successful, because the SCA jars are compiled
> using
> > JDK compiler and do not have the Android special bytecode format.
> >
> > Fortunately, when you import the SCA jars into an eclipse Android
> project,
> > it automatically tries to convert the JDK bytecode to Android bytecode
> > before execute it. But something was not going correctly yet, cause
> when it
> > tries to execute the service I get this exception:
> >
> > Application Error: com.android.hello An error in com.android.hello.
> Unnable
> > to start activity
> > ComponentInfo{com.android.hello/com.android.hello.HelloAndroid]:
> > org.osoa.sca.ServiceRuntimeException: java.lang.NullPointerException.
> >
> > I wasn't sure about what was happening, and then I tried another
> approach:
> > not import the SCA jars, but place the SCA source code needed by the
> > calculator sample into the Android app src folder. This way the SCA
> would be
> > compiled directly to Android bytecode.
> >
> > Unfortunately, the Android is not Java and does not have the entire set
> of
> > classes that J2SE provides. It provides only some java classes as
> java.langand
> > java.util classes which Android developers kept with the same
> package/class
> > names and method signature for easy portability of Java app codes. So,
> the
> > common Java classes used on Java SCA were compatible. But, the Java SCA
> uses
> > a lot the javax.xml package and Android implements only part of this
> package
> > on its platform, so I was getting a lot of errors because the missing
> > classes that should be contained in this package. I solved it
> downloading
> > the StAX source code and JDK javax.xml API source code, and placing it
> > directly on my Android app project. Finally I got it compiled.
> >
> > Then, I got another error. I found out that the Android compiler fist
> > compile the Java code to .class files and then compile the .class files
> to a
> > .dex file. The first process everything goes fine, meaning the package
> > dependencies and code syntax are OK. But on the second process, when it
> > tries convert the .class files to .dex, I get 4 warnings and 1 error
> that
> > are lightly described:
> >
> > *[2008-03-14 14:25:27 - HelloAndroid]
> > trouble processing:
> > [2008-03-14 14:25:27 - HelloAndroid] truncated annotation attribute
> > ...while parsing RuntimeVisibleAnnotations attribute at offset 00000175
> > ...while parsing attributes[1]
> > ...while parsing javax/xml/bind/annotation/XmlNs.class
> > ...while processing javax/xml/bind/annotation/XmlNs.class
> > [2008-03-14 14:25:27 - HelloAndroid]
> > trouble processing:
> > [2008-03-14 14:25:27 - HelloAndroid] truncated annotation attribute
> > ...while parsing AnnotationDefault attribute at offset 000002b8
> > ...while parsing attributes[0]
> > ...while parsing methods[0]
> > ...while parsing javax/xml/bind/annotation/XmlSchema.class
> > ...while processing javax/xml/bind/annotation/XmlSchema.class
> > [2008-03-14 14:25:28 - HelloAndroid]
> > trouble processing:
> > [2008-03-14 14:25:28 - HelloAndroid] truncated annotation attribute
> > ...while parsing AnnotationDefault attribute at offset 00000204
> > ...while parsing attributes[0]
> > ...while parsing methods[2]
> > ...while parsing javax/xml/ws/Action.class
> > ...while processing javax/xml/ws/Action.class
> > [2008-03-14 14:25:29 - HelloAndroid]
> > trouble processing:
> > [2008-03-14 14:25:29 - HelloAndroid] truncated annotation attribute
> > ...while parsing AnnotationDefault attribute at offset 0000020b
> > ...while parsing attributes[1]
> > ...while parsing methods[0]
> > ...while parsing org/osoa/sca/annotations/Service.class
> > ...while processing org/osoa/sca/annotations/Service.class
> > [2008-03-14 14:25:30 - HelloAndroid] 4 warnings
> > [2008-03-14 14:25:30 - HelloAndroid]
> > trouble writing output: not found
> > [2008-03-14 14:25:30 - HelloAndroid] Conversion to Dalvik format failed
> with
> > error 2
> >
> > *
> > So, I got nothing running so far : ( . Is there anyone with some
> Android
> > knowledge that could help us with it?
> >
> > I will probably send this doubts to Android community and see if they
> can
> > help us : )
> >
> > Thanks in advance ; )
> >
> > Adriano Crestani
> >
>
>
>
> --
> Luciano Resende
> Apache Tuscany Committer
> http://people.apache.org/~lresende <http://people.apache.org/%7Elresende>
> http://lresende.blogspot.com/
>
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