So, when I said branch, I probably should have said a sandbox. I think
we could start with a host-android module where I'd like to experiment
with changing the way we dynamically find extensions and see how
further we can go on executing calculator in the Android environment.
Thoughts ?
On Sat, Mar 15, 2008 at 2:30 AM, Adriano Crestani
<[EMAIL PROTECTED]> wrote:
> 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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> >
> >
>
--
Luciano Resende
Apache Tuscany Committer
http://people.apache.org/~lresende
http://lresende.blogspot.com/
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