BaseExpandableListAdapter RuntimeError NullPointerException

I'm trying to view data from a database in an ExpandableListView (I'm first trying to get it working with hard coded Strings). I've used the following example: CodeWiki ExpandableL

Solution 1:

I think the problem is at class "MyExpandableListAdapter" at line number 64. Here it seems that there is some variable is becoming null at that moment. Can you paste the code at line number 64 in this class. SO that i can assist you more.