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Android Android Lists and Adapters (2015) Lists with RecyclerViews Adding Methods for a RecyclerView Adapter

Error null exception :attempt to invoke method with null object reference

My object that I created mTimeLabel = (TextView) itemView.findViewById(R.id.timeTextHourly); is null. When i debug it seems that the int position in the onBindViewHolder somehow cannot be found.

error:local variable position cannot be found

what happened?