Iam doing a news app.But,I am encountering null pointer exception when I implement OnSendResultInterface in ListFragment.Below is my List fragment.The method is sendResult.
public class ListFragment extends Fragment implements OnItemClickListener,
OnSendResultInterface {
private ListView mListview;
private OnItemPressListener mItempressed;
@Override
public void onAttach(Activity activity) {
.......
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
..........
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
if (null != mItempressed) {
mItempressed.OnItemPress(position);
}
}
@Override
public void sendResult(List<Entry> result) {
Log.v("result", "result" + result);
RssAdapter adapter = new RssAdapter(getActivity(), result);
mListview.setAdapter(adapter);
}
}
This is my DownloadXmlTask.In this class Iam initializing the interface and declaring the method.
public class DownloadXmlTask extends AsyncTask<String, Void, List<Entry>> {
private OnSendResultInterface mSendResult;<---this is the listener
@Override
protected List<Entry> doInBackground(String... urls) {
.......
}
@Override
protected void onPostExecute(List<Entry> result) {
if (null != result)
mSendResult.sendResult(result); <----null pointer exception shown here.
}
public List<Entry> downloadUrl(String urlString) throws IOException {
..........
}
}
