Attempt to invoke virtual method ' 'on a null object reference

Question

I am getting the following error

Attempt to invoke virtual method \'void android.widget.StackView.setAdapter(android.widget.Adapter)\' on a null

Answer 1

You are doing:

stackView = (StackView) getActivity().findViewById(R.id.stackView1);

Your stackView is null. getActivity().findViewById returns null.

Why are you using getActivity()?

Where is the stackView? You should load it from the right xml.

as @Tauqir mentioned, you need to inflate the right xml like this:

View view = inflater.inflate(R.layout.events_layout, null);
stackView = (StackView) view.findViewById(R.id.stackView1);
return view;