Hey, The key information is found at
http://www.osgi.org/blog/2007/11/android-and-osgi.html namely, the classes.dex must be inside a jar file. I jar'd up a classes.dex file and fed it into the code for the osgi class loader (see http://blog.luminis.nl/luminis/entry/osgi_on_google_android_using ) and all was happy. hope this helps, k On Mar 6, 4:25 am, "Carl H." <[EMAIL PROTECTED]> wrote: > Have you had any further luck on this? > > ./Carlhttp://androforge.net > > On Mar 3, 3:16 am, MoggoDude <[EMAIL PROTECTED]> wrote: > > > Gidday, > > I am very interested in being able to dynamically load classes > > from within > > my Google Android Application at runtime. I have done some > > research on > > this topic and some trial and error coding. From my > > understanding so far, it appears > > that you have to load classess through a dex > > filehttp://groups.google.com/group/android-beginners/browse_thread/thread... > > > I have utilised the code from that from that approach as > > follows: > > > try { > > > File file = new File("/data/data/com.mystuff.android/ > > classes.dex"); > > > Class dexFileClass = Class.forName("android.dalvik.DexFile"); > > Constructor dexFileClassConstructor = > > dexFileClass.getConstructor( > > new Class[] { java.io.File.class }); > > > ObjectdexFile= dexFileClassConstructor.newInstance(new > > Object[] { file }); > > > Method dexFileClassLoadClass = > > dexFileClass.getMethod("loadClass", > > new Class[] { String.class, ClassLoader.class }); > > > dexFileClassLoadClass.invoke(dexFile, new Object[] > > { "com.somepackage.AClass", this.getClassLoader() }); > > > } catch(Exception ex) { > > } > > > The result of which is an Exception with a message: Unable to open DEX > > file, which occurs on the line > > ObjectdexFile= dexFileClassConstructor.newInstance(new Object[] > > { file });. > > > I have also tried instantiatingtheDexFiledirectly, as follows > > > try { > > > File file = new File("/data/data/com.mystuff.android/ > > classes.dex"); > > DexFiledexFile= newDexFile(file); > > > } catch(Exception ex) { > > } > > > And still get the same error: Unable to open DEX file. > > > I have also tried another approach useing a URLClassLoader, where I > > place my class files in a directory: > > /data/data/com.mystuff.android > > > try { > > URL url = new URL("file:/data/data/com.mystuff.android/"); > > > URLClassLoader ucl = URLClassLoader.newInstance(new URL[] > > { url }, this.getClassLoader()); > > Class clazz = ucl.loadClass("bsh.Interpreter"); > > > } catch(Exception ex) { > > } > > > This gives an Error of Unsupported Operation Exception. > > > Am I making the correct combination of method calls, or is there some > > other way of Dynamically Loading Classes. Any help > > on this issue would be greatly appreciated, as my application does > > need to load classes dynamically. > > > Regards, > > MoggoDude --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] Announcing the new M5 SDK! http://android-developers.blogspot.com/2008/02/android-sdk-m5-rc14-now-available.html For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
