ListFragment ListView Hep Boş

public class SolFrameFragment extends ListFragment implements View.OnClickListener {
 
     private SolFrameAdapter solFrameAdapter;
     ArrayList<TitleClass> titleList;
 
     public SolFrameFragment() {
         // Required empty public constructor
     }
 
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
         return inflater.inflate(R.layout.fragment_sol_frame, container, false);
     }
 
     @Override
     public void onActivityCreated(@Nullable Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);
         titleList = new ArrayList<>();
 
         new GetTitleContents().execute();
         titleList = MainActivity.titleList;
         
         solFrameAdapter = new SolFrameAdapter(getActivity(), R.layout.solframe_single, titleList);
         setListAdapter(solFrameAdapter);
     }
 
     @Override
     public void onClick(View v) {
 
     }
 }

public class SolFrameAdapter extends ArrayAdapter<TitleClass> {
     private final Context context;
     private final ArrayList<TitleClass> titleClassList;
 
     public SolFrameAdapter(Context context, int resource, ArrayList<TitleClass> titleClassList) {
         super(context, resource);
         this.context = context;
         this.titleClassList = titleClassList;
     }
 
     @NonNull
     @Override
     public View getView(int position, View convertView, ViewGroup parent) {
         TitleHolder holder;
         LayoutInflater layoutInflater = ((Activity) context).getLayoutInflater();
 
         if (convertView == null) {
             convertView = layoutInflater.inflate(R.layout.solframe_single, parent, false);
             holder = new TitleHolder();
             holder.titleTV = (TextView) convertView.findViewById(R.id.titleNameTV);
             holder.linkTV = (TextView) convertView.findViewById(R.id.titleLinkTV);
             holder.todayEntryTV = (TextView) convertView.findViewById(R.id.titleTodayCountTV);
             holder.totalEntryTV = (TextView) convertView.findViewById(R.id.titleTotalCountTV);
             holder.lastWriterTV = (TextView) convertView.findViewById(R.id.titleLastWriterTV);
             holder.firstWriterTV = (TextView) convertView.findViewById(R.id.titleFirstWriterTV);
             convertView.setTag(holder);
         } else {
             holder = (TitleHolder) convertView.getTag();
         }
 
         TitleClass titleClass = titleClassList.get(position);
 
         holder.titleTV.setText(titleClass.getTitle());
         holder.linkTV.setText(titleClass.getLink());
         holder.todayEntryTV.setText(titleClass.getTodayEntry());
         holder.totalEntryTV.setText(titleClass.getTotalEntry());
         holder.firstWriterTV.setText(titleClass.getFirstWriter());
         holder.lastWriterTV.setText(titleClass.getLastWriter());
 
         return convertView;
     }
 
     static class TitleHolder {
         TextView totalEntryTV;
         TextView todayEntryTV;
         TextView titleTV;
         TextView linkTV;
         TextView firstWriterTV;
         TextView lastWriterTV;
 
     }
 }

public class TitleClass {
     int totalEntry;
     int todayEntry;
     String title;
     String link;
     String firstWriter;
     String lastWriter;
 
     public TitleClass(int todayEntry, int totalEntry, String link, String title, String firstWriter, String lastWriter) {
         this.totalEntry = totalEntry;
         this.todayEntry = todayEntry;
         this.title = title;
         this.link = link;
         this.firstWriter = firstWriter;
         this.lastWriter = lastWriter;
     }
 
     public int getTotalEntry() {
         return totalEntry;
     }
 
     public int getTodayEntry() {
         return todayEntry;
     }
 
     public String getTitle() {
         return title;
     }
 
     public String getLink() {
         return link;
     }
 
     public String getFirstWriter() {
         return firstWriter;
     }
 
     public String getLastWriter() {
         return lastWriter;
     }
 }