As the title I want to create a listview with custom row in Fragment. My code below.
Fragment class
public class PhotosFragment extends Fragment{
public PhotosFragment(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_photos, container, false);
ArrayList<ListviewContactItem> listContact = GetlistContact();
ListView lv = (ListView)getActivity().findViewById(R.id.lv_contact);
lv.setAdapter(new ListviewContactAdapter(getActivity(), listContact));
return rootView;
}
private ArrayList<ListviewContactItem> GetlistContact(){
ArrayList<ListviewContactItem> contactlist = new ArrayList<ListviewContactItem>();
ListviewContactItem contact = new ListviewContactItem();
contact.SetName("Topher");
contact.SetPhone("01213113568");
contactlist.add(contact);
contact = new ListviewContactItem();
contact.SetName("Jean");
contact.SetPhone("01213869102");
contactlist.add(contact);
contact = new ListviewContactItem();
contact.SetName("Andrew");
contact.SetPhone("01213123985");
contactlist.add(contact);
return contactlist;
}
}
Adapter class
public class ListviewContactAdapter extends BaseAdapter{
private static ArrayList<ListviewContactItem> listContact;
private LayoutInflater mInflater;
public ListviewContactAdapter(Context photosFragment, ArrayList<ListviewContactItem> results){
listContact = results;
mInflater = LayoutInflater.from(photosFragment);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return listContact.size();
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return listContact.get(arg0);
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return arg0;
}
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder holder;
if(convertView == null){
convertView = mInflater.inflate(R.layout.contact_item, null);
holder = new ViewHolder();
holder.txtname = (TextView) convertView.findViewById(R.id.lv_contact_item_name);
holder.txtphone = (TextView) convertView.findViewById(R.id.lv_contact_item_phone);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.txtname.setText(listContact.get(position).GetName());
holder.txtphone.setText(listContact.get(position).GetPhone());
return convertView;
}
static class ViewHolder{
TextView txtname, txtphone;
}
}
But when I run the app that display no thing. Could anyone tell me what wrong here and how can I fix it?
This question is related to
android
listview
android-fragments
I guess your app crashes because of NullPointerException
.
Change this
ListView lv = (ListView)getActivity().findViewById(R.id.lv_contact);
to
ListView lv = (ListView)rootView.findViewById(R.id.lv_contact);
assuming listview belongs to the fragment layout.
The rest of the code looks alright
Edit:
Well since you said it is not working i tried it myself
A parent ViewGroup into which the fragment's View is to be inserted,
A third boolean telling whether the fragment's View as inflated from the layout XML file should be inserted into the parent ViewGroup.
In this case we pass false because the View will be attached to the parent ViewGroup elsewhere, by some of the Android code we call (in other words, behind our backs). When you pass false as last parameter to inflate(), the parent ViewGroup is still used for layout calculations of the inflated View, so you cannot pass null as parent ViewGroup .
View rootView = inflater.inflate(R.layout.fragment_photos, container, false);
So, You need to call rootView
in here
ListView lv = (ListView)rootView.findViewById(R.id.lv_contact);
Instead:
public class PhotosFragment extends Fragment
You can use:
public class PhotosFragment extends ListFragment
It change the methods
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
ArrayList<ListviewContactItem> listContact = GetlistContact();
setAdapter(new ListviewContactAdapter(getActivity(), listContact));
}
onActivityCreated is void and you didn't need to return a view like in onCreateView
You can see an example here
Please use ListFragment
. Otherwise, it won't work.
EDIT 1:
Then you'll only need setListAdapter()
and getListView()
.
you need to give:
public void onActivityCreated(Bundle savedInstanceState)
{
super.onActivityCreated(savedInstanceState);
}
inside fragment.
Source: Stackoverflow.com