android force close: ClassNotFoundException for Activity class

Question

When I start my (soon-to-be) android game (from eclipse) it opens, but immediately force-closes.

Logcat says:

07-09 17:12:35.709: ERROR/AndroidRuntim         


        

Answer 1

Just had this same problem. Was going nuts. Fully restarted emulator/adb/and eclipse and it fixed it. Strange stuff...

Answer 2

I know it's not your problem , but I had exactly the same problem. Suddenly my app stopped working. I didint make any change to manifest, but with some accident there was missing first row:

<?xml version="1.0" encoding="utf-8"?>

This caused ClassNotFoundException for launcher activity. I was struggling with that for few hours and I overlooked this every time I was checking manifest for possible mistake.

Strange thing happened after I have deleted this row again. Suprise, suprise app was still working. (and I didnt forget to rebuild app)

Hope this help someone to save few hours.

Answer 3

Not really a solution but this fixed it:

creating a new project from scratch and migrating the code

Please close this if something like it is possible here.

Thanks for all your ideas and thoughts!

Answer 4

Did you rename in Eclipse. Double check that it renamed with sub-package correctly. In my case it removed the dot:

Wrong: ui.MyActivity

Fix: .ui.MyActivity

Answer 5

I had the same problem and in my case, I had forgot to put a library in the Android Manifest. I had a MapView Activity and I had forgot to put :

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

So, you should make sure you have all your library included in your manifest.