Attempt to invoke virtual method 'android.content.Context.getResources()' on a null object reference

Question

I try to use a fragment to open a database, however, when I click the button to begin searching, the program unexpectedly terminates and it show the error like this:

Answer 1

Same error I went through! It run well in MainActivity but not in my Fragment class.

I solved this problem by doing the following 2 things:

1) In Fragment class, don't declare anything globally like we do in Activity class.

For example:

public class HomeFragment extends Fragment {

// DON'T WRITE THIS HERE LIKE YOU DO IN ACTIVITY
String myArray[] = getResources().getStringArray();

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
 ...
}

Instead, write anything inside

onCreateView()

method.

2) Use

getActivity()

method first and then

getResource() method

  public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

//WRITE LIKE THIS
 String myArray[] = getActivity().getResources().getStringArray(R.array.itemsList);

...
}