ClassNotFoundException after upgrading to ADT 18

Question

Since I updated ADT to 19, I started to get following error. The problem happens whenever I start my apps. I checked all the previous post related to this, but it seems none of them helps. any idea would be GREATLY appreciated...

My setup

1. I currently have ADT 18, SDK 19, elcipse in Windows 7 64bit.
2. I use library project which makes ashare.jar and all my external jars (i.e. dropbox, commons codec) are in "libs" folder in Library project (Ashare).
3. I don't use proguard.

How we see this problem.

1. Create apk in eclipse > {MyProject} > Right click > Android Tools > Export signed application package
2. install the apk in emulator or dev.phone using "adb install XXX.apk"
3. Start the app. Then, BOOM. it throw the error.

Some noticeable things are

1. It started to happen after I updated to ADT in my eclipse to version 18
2. It happens only when I make signed apk and run it in emulator or dev.phone.
3. I don't see problem if I run my app using {MyProject} > Right click > Run As > Android Application
4. When I checked inside of classes.dex, I see some classes are missing there. I am not sure, but I feel Build process is not including all classes in classes.dex
5. During the export, there's no error in eclipse console (I use verbose option in Android>Build>Build output setting)

Java Exception

05-07 08:52:48.336: D/AndroidRuntime(3055): Shutting down VM
05-07 08:52:48.336: W/dalvikvm(3055): threadid=1: thread exiting with uncaught exception (group=0x40a3e1f8)
05-07 08:52:48.340: E/AndroidRuntime(3055): FATAL EXCEPTION: main
05-07 08:52:48.340: E/AndroidRuntime(3055): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.acj0.barcodeexpdemo/com.acj0.barcodeexpdemo.Launcher}: java.lang.ClassNotFoundException: com.acj0.barcodeexpdemo.Launcher
05-07 08:52:48.340: E/AndroidRuntime(3055):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1880)
05-07 08:52:48.340: E/AndroidRuntime(3055):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
05-07 08:52:48.340: E/AndroidRuntime(3055):     at android.app.ActivityThread.access$600(ActivityThread.java:123)
05-07 08:52:48.340: E/AndroidRuntime(3055):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
05-07 08:52:48.340: E/AndroidRuntime(3055):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-07 08:52:48.340: E/AndroidRuntime(3055):     at android.os.Looper.loop(Looper.java:137)
05-07 08:52:48.340: E/AndroidRuntime(3055):     at android.app.ActivityThread.main(ActivityThread.java:4424)
05-07 08:52:48.340: E/AndroidRuntime(3055):     at java.lang.reflect.Method.invokeNative(Native Method)
05-07 08:52:48.340: E/AndroidRuntime(3055):     at java.lang.reflect.Method.invoke(Method.java:511)
05-07 08:52:48.340: E/AndroidRuntime(3055):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-07 08:52:48.340: E/AndroidRuntime(3055):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-07 08:52:48.340: E/AndroidRuntime(3055):     at dalvik.system.NativeStart.main(Native Method)
05-07 08:52:48.340: E/AndroidRuntime(3055): Caused by: java.lang.ClassNotFoundException: com.acj0.barcodeexpdemo.Launcher
05-07 08:52:48.340: E/AndroidRuntime(3055):     at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
05-07 08:52:48.340: E/AndroidRuntime(3055):     at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
05-07 08:52:48.340: E/AndroidRuntime(3055):     at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
05-07 08:52:48.340: E/AndroidRuntime(3055):     at android.app.Instrumentation.newActivity(Instrumentation.java:1023)
05-07 08:52:48.340: E/AndroidRuntime(3055):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1871)
05-07 08:52:48.340: E/AndroidRuntime(3055):     ... 11 more

UPDATE 5/7/2012

• All my jars are in "libs" folder of Library project and I see all of them included in "Android Dependencies"

UPDATE 5/18/2012 - TEMPORARILY SOLVED

• I found temporary solution. Right before running "Export signed application package", I did "Clean" WITHOUT "build automatically" option checked. Then, I don't see the error anymore. I don't know why it works. If you have any idea, please let me know.

Answer 1

Put your externals jars in libs directory. You can take a look at this link