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/ > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > -- Luciano Resende Apache Tuscany Committer http://people.apache.org/~lresende http://lresende.blogspot.com/ --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]