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POAndroid ListView not refreshing after notifyDataSetChanged
 

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  1. POAndroid ListView not refreshing after notifyDataSetChanged
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    <p>My ListFragment code </p> <pre><code>public class ItemFragment extends ListFragment { private DatabaseHandler dbHelper; private static final String TITLE = "Items"; private static final String LOG_TAG = "debugger"; private ItemAdapter adapter; private List&lt;Item&gt; items; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.item_fragment_list, container, false); return view; } @Override public void onCreate(Bundle savedInstanceState) { super.setHasOptionsMenu(true); super.onCreate(savedInstanceState); getActivity().setTitle(TITLE); dbHelper = new DatabaseHandler(getActivity()); items = dbHelper.getItems(); adapter = new ItemAdapter(getActivity().getApplicationContext(), items); this.setListAdapter(adapter); } @Override public void onResume() { super.onResume(); items.clear(); items = dbHelper.getItems(); //reload the items from database adapter.notifyDataSetChanged(); } @Override public void onListItemClick(ListView l, View v, int position, long id) { super.onListItemClick(l, v, position, id); if(dbHelper != null) { //item is edited Item item = (Item) this.getListAdapter().getItem(position); Intent intent = new Intent(getActivity(), AddItemActivity.class); intent.putExtra(IntentConstants.ITEM, item); startActivity(intent); } } } </code></pre> <p>My ListView</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" &gt; &lt;ListView android:id="@android:id/list" android:layout_width="fill_parent" android:layout_height="wrap_content" /&gt; &lt;/LinearLayout&gt; </code></pre> <p>But this does not refresh the <code>ListView</code>. Even after restarting app the updated items are not shown. My <code>ItemAdapter</code> extends <code>BaseAdapter</code></p> <pre><code>public class ItemAdapter extends BaseAdapter{ private LayoutInflater inflater; private List&lt;Item&gt; items; private Context context; public ProjectListItemAdapter(Context context, List&lt;Item&gt; items) { super(); inflater = LayoutInflater.from(context); this.context = context; this.items = items; } @Override public int getCount() { return items.size(); } @Override public Object getItem(int position) { return items.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { ItemViewHolder holder = null; if(convertView == null) { holder = new ItemViewHolder(); convertView = inflater.inflate(R.layout.list_item, parent,false); holder.itemName = (TextView) convertView.findViewById(R.id.topText); holder.itemLocation = (TextView) convertView.findViewById(R.id.bottomText); convertView.setTag(holder); } else { holder = (ItemViewHolder) convertView.getTag(); } holder.itemName.setText("Name: " + items.get(position).getName()); holder.itemLocation.setText("Location: " + items.get(position).getLocation()); if(position % 2 == 0) { convertView.setBackgroundColor(context.getResources().getColor(R.color.evenRowColor)); } else { convertView.setBackgroundColor(context.getResources().getColor(R.color.oddRowColor)); } return convertView; } private static class ItemViewHolder { TextView itemName; TextView itemLocation; } } </code></pre> <p>Can someone help please?</p>
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    1. COHave you tested to see if the database operation are working properly? How does the adapter look like? Also, if you create an on object for the `adapter` reference why do you test it for null one line below?
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    2. COCode does not throw exception and I checked using debug. All methods executed without error. Yeah thats a silly mistake.
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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