Populate list of custom view using ListFragment

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没有蜡笔的小新
没有蜡笔的小新 2020-12-01 08:57

I am trying to show elements in a list view using Fragments. I created my custom view as follow

graphical representation of list_row.xml

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  • 2020-12-01 09:08

    I solved my problem (as system32 suggests on comment) creating a CustomArrayAdapter class, and setting it as the adapter for my listView.

    First I changed android:id="@+id/listView1" to android:id="@android:id/list" in fragment.xml.

    CustomArrayAdapter.java

    public class CustomArrayAdapter extends ArrayAdapter<Menu> {
    
        Context context;
    
        public CustomArrayAdapter(Context context, int textViewResourceId, List<Menu> objects) {
            super(context, textViewResourceId, objects);
            // TODO Auto-generated constructor stub
            this.context = context;
        }
    
        /*private view holder class*/
        private class ViewHolder {
            ImageView imageView;
            TextView txtMenuName;
            TextView txtMenuDesc;
            TextView txtPrice;
        }
    
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder = null;
            Menu rowItem = getItem(position);
    
            LayoutInflater mInflater = (LayoutInflater) context
                    .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
            if (convertView == null) {
                convertView = mInflater.inflate(R.layout.list_row, null);
                holder = new ViewHolder();
                holder.txtMenuName = (TextView) convertView.findViewById(R.id.menu_name);
                holder.txtMenuDesc = (TextView) convertView.findViewById(R.id.description);
                holder.txtPrice = (TextView) convertView.findViewById(R.id.price);
                holder.imageView = (ImageView) convertView.findViewById(R.id.list_image);
                convertView.setTag(holder);
            } else
                holder = (ViewHolder) convertView.getTag();
    
            holder.txtMenuDesc.setText(rowItem.getDescription());
            holder.txtMenuName.setText(rowItem.getName());
            holder.txtPrice.setText(String.valueOf(rowItem.getPrice()) + " TL");
            //holder.imageView.setImageResource(rowItem.getImageId());
    
            return convertView;
        }
    
    }
    

    Then I use it in my Fragment class

        public static class Fragment extends ListFragment {
            /**
             * The fragment argument representing the section number for this
             * fragment.
             */
            public static final String ARG_SECTION_NUMBER = "section_number";
    
            private ListView listView;
            private ArrayList<Menu> menuItems;
            private CustomArrayAdapter mAdapter;
    
            @Override
            public View onCreateView(LayoutInflater inflater, ViewGroup container,
                    Bundle savedInstanceState) {
                View rootView = inflater.inflate(R.layout.fragment,
                        container, false);
                listView = (ListView) rootView.findViewById(android.R.id.list);
    
                return rootView;
            }
    
            @Override
            public void onActivityCreated(Bundle savedInstanceState) {
                super.onActivityCreated(savedInstanceState);
                int num = getArguments().getInt(ARG_SECTION_NUMBER);
                // GlobalList is a class that holds global variables, arrays etc
                // getMenuCategories returns global arraylist which is initialized in GlobalList class
                menuItems = GlobalList.getMenuCategories().get(num).getMenu();
                mAdapter = new CustomArrayAdapter(getActivity(), android.R.id.list, menuItems);
                listView.setAdapter(mAdapter);
            }
        }
    
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