getting an exception when using it as a library

[GoogleCodeExporter]

Since i'm a beginner i can't figure it out why i'm getting this exception.
i have added 

library_name=pl.polidea.sectionedlist

<uses-library
android:name="@string/library_name"   
android:required="true"/> 

in manifest.xml file and added it as a library also and 
and i have changed the main manifest file as you have indicated in the sample 
to use the sectionListView 

but i'm getting this error:

"java.lang.RunTimeException:Unable to start activity componentInfo 
{pl.polidea.sectionedList/my.package.listActivity}: 
java.lang.NullpointerException"

Android 2.2

i have attached my testing code. please have look at my issue. thanks in 
advance 

Original issue reported on code.google.com by rajithsi...@gmail.com on 7 Mar 2012 at 9:02

[GoogleCodeExporter]

[deleted comment]

[GoogleCodeExporter]

------and i have changed the main.xml (not manifest) file as you have indicated 
in the sample to use the sectionListView -----

Original comment by rajithsi...@gmail.com on 7 Mar 2012 at 9:05

[GoogleCodeExporter]

Hey, I need some more info to be able to help - there is no code attached, and 
also you do not show the stack-trace of your exception - that would be 
extremely helpful to see what the problem is.

Original comment by ja...@potiuk.com on 17 Mar 2012 at 4:31

• Changed state: Invalid