Android: getContext().getContentResolver() sometimes gets NullPointerException

Question

I want to ask why we get this annotation:

Method invocation getContext.getContentResolver() may produce NullPointerException

Why i

Answer 1

Ok it seems I fixed it myself by declaring Context on the beggining of the class.

public class NoteProvider extends ContentProvider {
    Context context;

then initializing it in onCreate()

@Override
    public boolean onCreate() {
        mSQLiteOpenHelper = new NoteDbHelper(getContext());
        context = getContext();

        return true;
    }

I think that made sure that I always have Context when I use context.getContentResolver().notifyChange(uri, null); or retCursor.setNotificationUri(context.getContentResolver(), uri); in insert/update/delete/query method- retCursor being returned cursor by mentioned methods.

I have run the aplication on my phone and did not have issues yet if I will there will probably be an edit for this post.

EDIT:

It does not make a difference after all - explanationin answer by @Mate, thank you for that I think I get it now :]