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Editorial Team
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Asked: 2026-06-10T20:28:22+00:00

I have dug out an old android project that I was working on a

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I have dug out an old android project that I was working on a few years ago and loaded it into a new eclipse install (latest ADT etc).

The project all compiles ok (after some minor tweaking), and the app starts fine, however, when i press a button to start the main activity i get the following stack trace:

FATAL EXCEPTION: main
java.lang.NoClassDefFoundError: com.tmm.android.activities.GameActivity
    at com.tmm.android.activities.StartActivity.onClick(StartActivity.java:53)
    at android.view.View.performClick(View.java:2408)

Now the class in question (GameActivity) is one of my classes that is in the app, so I know thats not the problem – but I noticed a warning right at the top of the logcat:

Unable to resolve superclass of Lcom/tmm/android/activities/GameActivity; (33)
Link of class 'Lcom/tmm/android/activities/GameActivity;' failed

My class GameActivity extends another class that is part of a third-party jar that i have included in the project (included it in the ‘libs’ directory, and added it to the project build path in eclipse).

Can anyone advise what I might have done wrong, or anything that has changed in the ADT/etc that I might need to take account of (it was working fine when i last had it in Eclipse)

Cheers

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1 Answer

  1. Editorial Team

    Ok, was a simple problem in the end..

    Having added the 3rd party library to the build path, the export tab wasnt defaulted to export the jar (eclipse normal behaviour) – so the jar wasnt being included in the deployment..

    got past that problem ok..

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