On Nov 26, 2013, at 8:27 AM, Vladimir Dimitrov <vlad.dimit...@gmail.com> wrote:
> I am trying to make a jar bindings project that I need in my app.
> 1. I created a jar binding project.
> 2. Added the .jar file in the Jars folder.
> 3. Made it an EmbeddedJar
> 4. Build the project
> 5. Referenced the project from another project and added some logic using the
> callable wrappers.
>
> Now when I build the project I see that an assembly is generated with the
> .jar file inside it as a resource.
> But when I try to run in debug mode I get a java.lang.NoClassDefFoundError
> exception.
> I noticed that if I build an .apk, unzip it and decompile the jar bindings
> assembly, the jar file is no longer in it.
This is by design, and is unrelated to your error.
Android doesn't run Java bytecode, it runs Dalvik bytecode. Consequently, .jar
files on device are entirely useless, and would only serve to bloat your
application size for no benefit.
Instead, what should be happening is that the .jar resource is extracted, and
the .jar is then passed to dx.jar (the Dex compiler) along with all the other
Java bytecode that makes up the app (compiled Android Callable Wrappers, etc.).
The important part, then, is the `classes.dex` entry within the .apk. The
"sanity check" is to extract your .apk, run `dexdump classes.dex`, and see if
the type you're getting a NoClassDefFoundError for is present (or not present)
within classes.dex. (`dexdump` is located in the Android SDK, e.g.
$ANDROID_SDK_PATH/build-tools/19.0.0/dexdump.)
Note that dexdump lists types in JNI format, e.g. you'll see
"L/your/package/name/TypeName;".
If the type is missing from classes.dex, that's a problem. :-)
I would suggest cleaning everything, nuking all bin & obj directories, and
rebuilding. If that doesn't fix it, please provide the diagnostic build output.
In particular, you want to find `dx.jar` invocation, and double-check that your
embedded .jar is listed:
Tool /usr/bin/java execution started with arguments: -jar
/opt/android/sdk/platform-tools/lib/dx.jar --no-strict --dex
--output=obj/Release/android/bin/classes.dex obj/Release/android/bin/classes
/Library/Frameworks/Xamarin.Android.framework/Versions/Current/lib/mandroid/platforms/android-8/mono.android.jar
obj/Release/__library_projects__/android-support-v4.jar
- Jon
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