Android - Illegalstateexception - Could Not Find A Method Startrhythmandanimation In The Activity Class

I can't understand why I'm getting this error message. My method IS in the activity class and the spelling is correct. 02-09 18:23:57.211: E/AndroidRuntime(19939): FATAL EXCEPTION:

Solution 1:

You need to include a single View parameter for the system to find your method:

public void startRhythmandAnimation (View view)