在共享首选项中的存储列表上应用 notifyDataSetChanged

我的列表视图有问题 我正在使用用户在单击添加新按钮时在对话框中输入的内容填充我的列表视图。单击此按钮时，会出现一个对话框，并要求用户在用户按下完成时输入某些内容，即使我放置了 notifyDataSetChanged，他/她输入的内容也不会出现在列表中的视图中。用户输入的内容仅在片段重新启动时出现。我认为这可能涉及保存代码中的 tinyDB 共享首选项。我如何确保存储的列表注意到 notifyDataSetChanged 。谢谢

    @Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_year_two_my_courses_first_semester, container, false);
    btnAddNew = (Button)rootView.findViewById(R.id.btnAddNewYearTwoFirstSemester);
    btnSave = (Button)rootView.findViewById(R.id.btnSaveAddedSubjectsFirstSemesterYr2);
    listView = (ListView)rootView.findViewById(R.id.listViewSubjectsMyCoursesFirstSemesterYr2);
    tinyDB = new TinyDB(getContext());
    storedList = new ArrayList<>(tinyDB.getListString("storedList1stYr2"));
    storedArray = new ArrayList<>();
    generalList = new ArrayList<>();

    generalList.addAll(storedArray);
    generalList.addAll(storedList);



    getActivity().setTitle("Year Two");

    setHasOptionsMenu(true);

    btnAddNew.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            btnSave.setVisibility(View.VISIBLE);
            AlertDialog.Builder alertDialog = new AlertDialog.Builder(getContext(),R.style.DialogeTheme);
            // Setting Dialog Title
            alertDialog.setTitle("Add new");

            // Setting Dialog Message
            String getUsername = tinyDB.getString("Username");
            alertDialog.setMessage("Hello "+ getUsername + ", please write the new subject");
            final EditText input = new EditText(getContext());
            LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
                    LinearLayout.LayoutParams.MATCH_PARENT,
                    LinearLayout.LayoutParams.MATCH_PARENT);
            input.setLayoutParams(lp);
            input.setTextColor(Color.parseColor("#f06292"));
            alertDialog.setView(input);
            alertDialog.setPositiveButton("Add", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    String getSubjectInput = input.getText().toString();
                    storedList.add(getSubjectInput);
                    tinyDB.putListString("storedList1stYr2", storedList);
                    arrayAdapter.notifyDataSetChanged();


                }
            });

            alertDialog.setNegativeButton("CANCEL",
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int which) {

                            dialog.cancel();
                        }
                    });
            // Showing Alert Message
            alertDialog.create();
            alertDialog.show();

        }
    });
    arrayAdapter = new CustomListAdapter(getContext(),generalList);
    listView.setAdapter(arrayAdapter);
    arrayAdapter.notifyDataSetChanged();


    return rootView;
}