java - x.y Activity is not a concrete class error message in manifest -


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i got ... "is not concrete class" error in manifest file.

the app works though. can build , test without problem error bugs eyes. please if can.

when i ctrl + click on activity name on manifest opens .java src file.

(the activity called "mapinputactivty" - typo know, not problem.)

that message telling mapinputactivty class abstract, , instantiation fail should system try launch it. base classes app's components don't need appear in manifest. concrete subclasses necessary, system has appropriate information on components' capabilities , functionalities. example, though of activities must descendents of activity class, wouldn't list activity class in manifest.


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