Hi all,
I've been having some trouble with a NoClassDefFound exception recently.
The details are below (Copy pasted from StackOverflow,
http://stackoverflow.com/q/11171726/1069068):
<so>
I've been working on a game for a few months now, and have suddenly
encountered a problem.
Since yesterday, I have been getting a NoClassDefFound error. There have
been no code changes at all. It was working at night, and wasn't in the
morning. No change at all. Here is the exact stacktrace:
06-23 23:12:19.746: E/ACRA(29146): Blue Boy fatal error :
com.appaholics.blueboy.BlueBoy
06-23 23:12:19.746: E/ACRA(29146): java.lang.NoClassDefFoundError:
com.appaholics.blueboy.BlueBoy
06-23 23:12:19.746: E/ACRA(29146): at
com.appaholics.blueboy.LoadingScreen.loadTextures(LoadingScreen.java:125)
06-23 23:12:19.746: E/ACRA(29146): at
com.appaholics.blueboy.LoadingScreen.load(LoadingScreen.java:85)
06-23 23:12:19.746: E/ACRA(29146): at
com.appaholics.blueboy.LoadingScreen.onCreate(LoadingScreen.java:40)
06-23 23:12:19.746: E/ACRA(29146): at
android.app.Activity.performCreate(Activity.java:4465)
06-23 23:12:19.746: E/ACRA(29146): at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
06-23 23:12:19.746: E/ACRA(29146): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
06-23 23:12:19.746: E/ACRA(29146): at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
06-23 23:12:19.746: E/ACRA(29146): at
android.app.ActivityThread.access$600(ActivityThread.java:123)
06-23 23:12:19.746: E/ACRA(29146): at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
06-23 23:12:19.746: E/ACRA(29146): at
android.os.Handler.dispatchMessage(Handler.java:99)
06-23 23:12:19.746: E/ACRA(29146): at
android.os.Looper.loop(Looper.java:137)
06-23 23:12:19.746: E/ACRA(29146): at
android.app.ActivityThread.main(ActivityThread.java:4424)
06-23 23:12:19.746: E/ACRA(29146): at
java.lang.reflect.Method.invokeNative(Native Method)
06-23 23:12:19.746: E/ACRA(29146): at
java.lang.reflect.Method.invoke(Method.java:511)
06-23 23:12:19.746: E/ACRA(29146): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
06-23 23:12:19.746: E/ACRA(29146): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
06-23 23:12:19.746: E/ACRA(29146): at
dalvik.system.NativeStart.main(Native Method)
The method in which the exception occurs:
private void loadTextures() {
BlueBoy.sTextures = new HashMap<String,TextureRegion>();
BlueBoy.sTiledTextures = new HashMap<String,TiledTextureRegion>();
BlueBoy.sTextureHolders = new ArrayList<Texture>();
BlueBoy.sHitVoiceSounds = new Sound[4];
BlueBoy.sHitSounds = new Sound[4];
BlueBoy.sWinSounds = new Sound[8];
BlueBoy.sLoseSounds = new Sound[4];
Texture texture;
TextureRegionFactory.setAssetBasePath("gfx/");
BufferObjectManager.setActiveInstance(new BufferObjectManager());
}
However, the class BlueBoy definitely exists. To make absolutely sure, I
have taken to decompiling my own app's classes.dex. I have decompiled both
the one generated while making the .apk and the on in the .apk itself. The
class is present in both of them. It is also present in
/bin/classes/com/appaholics/blueboy/. When decompiled, I can see the full
source of the class, as it should be.
I have tried everything I could think of and find on the net to fix it. I
have:
- Done a Clean Build on it
- Created a new project from source in eclipse
- Created a new project and manually shifted everything to it
- Tried renaming the class
- Tried renaming the package
- Tried compiling it from the command line
- Tried cleaning it from the command line
All of the other projects in the workspace work fine.
Other classes like the splash screen and loading screen, which are launched
before BlueBoy work fine. Android can find them.
Does anybody have any idea as to why this would happen? The class is exists
as surely as I exist, but Android disagrees.
EDIT: As per duffymo's suggestion, I check the class path for the existence
of this class by adding the following to my splash screen:
try {
Class.forName("com.appaholics.blueboy.BlueBoy", false, null);
} catch (ClassNotFoundException e1) {
Log.d("ClassCheck", "Not found.");
e1.printStackTrace();
}
I get the Not Found message in the LogCat. Now that we know that the class
isn't there in the classpath, how do I fix it? The class is in the same
package as the splash screen and loading class, and both of those are
present. What could cause this one class to not be there, and how could I
fix it?
EDIT2: FWIW, System.getProperties("java.class.path"); returns ".".
</so>
Since then I've created an absolutely new activity, and moved the code to
that, and it still crashes with the same exception. All references were
changed.
--
Raghav Sood
Please do not email private questions to me as I do not have time to answer
them. Instead, post them to public forums where others and I can answer and
benefit from them.
http://www.appaholics.in/ - Founder
http://www.apress.com/9781430239451 - Author
+91 81 303 77248
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