Custom Adapter getView() method is not called

Question

Here is the code of the fragment in which I am setting a custom adapter to the list.

There no errors but the ListView is empty. I have implemented getCount() which returns right number of items in my ArrayList. I don't see ("Inside", "GetView") in the logcat

Fragment

public class ServiceCarListFragment extends Fragment {      private String url;     private ArrayList<CarDetail> carDetailList = new ArrayList<CarDetail>();     private CarListAdapter adapter;     private ListView mList;      @Override     public void onCreate(Bundle savedInstanceState) {         // TODO Auto-generated method stub         super.onCreate(savedInstanceState);         url = getActivity().getIntent().getStringExtra("url");         new DownloadCarDetail().execute(url);     }      @Override     public View onCreateView(LayoutInflater inflater, ViewGroup container,                              Bundle savedInstanceState) {         // TODO Auto-generated method stub         View v = inflater.inflate(R.layout.fragment_service_car_list, container, false);         mList = (ListView) v.findViewById(R.id.list);         mList.setAdapter(adapter);          for (CarDetail car : carDetailList) {             // START LOADING IMAGES FOR EACH STUDENT             car.loadImage(adapter);         }         return v;     }      class DownloadCarDetail extends AsyncTask<String, String, ArrayList<CarDetail>> {          @Override         protected ArrayList<CarDetail> doInBackground(String... params) {             // TODO Auto-generated method stub             ArrayList<CarDetail> carDetailList = JsonParser.parseJson(params[0]);             return carDetailList;         }          @Override         protected void onPostExecute(ArrayList<CarDetail> carDetailList) {             // TODO Auto-generated method stub             ServiceCarListFragment.this.carDetailList = carDetailList;             Log.d("dccs", String.valueOf(ServiceCarListFragment.this.carDetailList.size()));             adapter = new CarListAdapter(getActivity(), ServiceCarListFragment.this.carDetailList);             Log.d("dccs", String.valueOf((adapter.getCount())));         }      } } 

CustomAdapter

public class CarListAdapter extends BaseAdapter {      private ArrayList<CarDetail> items = new ArrayList<CarDetail>();     private Context context;      public CarListAdapter(Context context, ArrayList<CarDetail> items) {         this.context = context;         this.items = items;     }      @Override     public int getCount() {         // TODO Auto-generated method stub         return items.size();     }      @Override     public Object getItem(int position) {         // TODO Auto-generated method stub         return items.get(position);     }      @Override     public long getItemId(int position) {         // TODO Auto-generated method stub         return position;     }      @Override     public View getView(int position, View convertView, ViewGroup parent) {         // TODO Auto-generated method stub         Log.d("Inside", "GetView");         LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);         ViewHolder holder = null;         CarDetail car = items.get(position);          if (convertView == null) {             convertView = mInflater.inflate(R.layout.car_list_row, null);             holder = new ViewHolder();             holder.tvCarName = (TextView) convertView.findViewById(R.id.tvCarName);             holder.tvDailyPriceValue = (TextView) convertView.findViewById(R.id.tvWeeklyPriceValue);             holder.tvWeeklyPriceValue = (TextView) convertView.findViewById(R.id.tvWeeklyPriceValue);             holder.imgCar = (ImageView) convertView.findViewById(R.id.imgCar);             convertView.setTag(holder);         } else {             holder = (ViewHolder) convertView.getTag();         }          holder.tvCarName.setText(car.getCarName());         if (car.getImage() != null) {             holder.imgCar.setImageBitmap(car.getImage());         } else {             // MY DEFAULT IMAGE             holder.imgCar.setImageResource(R.drawable.ic_action_call);         }          return convertView;     }      static class ViewHolder {         TextView tvCarName;         TextView tvDailyPriceValue;         TextView tvWeeklyPriceValue;         ImageView imgCar;     }  } 

Answer 1

The only reasons getView is not called are:

1. getCount returns 0.
2. you forget to call setAdapter on the ListView.
3. If the ListView's visibility (or its container's visibility) is GONE. Thanks to @TaynãBonaldo for the valuable input.
4. ListView is not attached to any viewport layout. That is, mListView = new ListView(...) is used without myLayout.addView(mListView).

In the onPostExcute, after you create a new instance of CarListAdapter I will suggest you to update the new instance to your ListView. Indeed you need to call again

 mList.setAdapter(adapter); 

Edit: setAdapter should be always called on the ui thread, to avoid unexpected behaviours

Edit2:

The same applies to RecyclerView. Make sure that

• getItemCount is returning a value grater than 0 (usually the dataset size)
• both setLayoutManager and setAdapter have to be called on the UI Thread
• The visibility of the widget has to be set to VISIBLE