Android java.lang.RuntimeException: Unable to instantiate activity ComponentInfo

Question

Ok guys this doesn\'t make sense to me at all and I don\'t understand why I am getting this error in my app. I have registered the activity class in the android manifrest xm

Answer 1

Have you tried to initialise anything in your class before OnCreate gets called?
If you initialise static variables (for example) it can give you this (infuriatingly obtuse) error.

Answer 2

What worked for me is deleting the innermost files inside "build" folder, which are the files inside generated, intermediates, outputs, and tmp.

Answer 3

I had the same problem and I solved it by updating the ADT plugin.

Answer 4

I had the same problem. It was a pretty confusing error until I found a way out. Go to Properties>Java Build Path>Order and Export and move your android-support-v4.jar to the top. It worked fine for me. Try it out.

Answer 5

Have you tried to clean your workspace. Goto Project->Clean and select your project. For some reason eclipse doesn't build my manifest automatically.

Answer 6

Either your manifest package is not com.mobile.batteryhelper, or there is no com.mobile.batteryhelper.Battery class in your code. Possibly you don't have a public constructor for the class or the class is not declared public (though I think you would get a slightly different error message in that case).

Make sure that you aren't using ProGuard to strip your code. Make sure the class is public, in the correct package (same as your manifest package), and doesn't have a constructor. Also it would be useful to see the entire error stack crawl in case there is something useful inside of it.