NoClassDefFoundError - Eclipse and Android

Question

I\'m having a problem trying to run an Android app which, up until adding a second external library to its build path, was working fine. Since having added the scoreninja ja

Answer 1

Sometimes it will happen due to not including jar, which you have dependency, with "uses-libary" tag in your AndroidManifest.xml.

Also, make sure it should be inside "application" tag.

Regards,

Ravi

Answer 2

I'm not sure if this is related, or if you're even still looking for an answer, but I came across this thread while trying to research the same error (but possibly for different reasons).

I couldn't find any solutions online, but an answer on a similar thread got me thinking and realized I probably just needed to rebuild (or clean) the project.

In Eclipse, go to Project => Clean. Select your project and Eclipse seemed to fix it itself. For me this solved the problem.

Hope this helps.

Answer 3

If you change your order and export in your project build path, this error will not occur. The other way of achieving it is through .classpath in your project folder.

Answer 4

Acutally you have reached the infamous 64k limit issue, you need to enable multidex.

This is how you do it. https://developer.android.com/tools/building/multidex.html

Answer 5

I had this for MapActivity. Builds in Eclipse gets NoClassDefFound in debugger.

Forgot to add library to manifest, inside <Application>...</Application> element

<uses-library android:name="com.google.android.maps" />

Answer 6

Same thing worked for me: Properties -> Java Build Path -> "Order and Export" Interestingly - why this is not done automatically? I guess some setting is missing. Also this happened for me after SDK upgrade.