创建片段的Andr​​oid的ListView [英] Create listview in fragment android

问题描述

正如标题我想创建一个片段中自定义行列表视图。我下面code。

As the title I want to create a listview with custom row in Fragment. My code below.

片段类

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类

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;
}
}

但是，当我运行不显示任何东西的应用程序。谁能告诉我错在这里什么，我该如何解决？

But when I run the app that display no thing. Could anyone tell me what wrong here and how can I fix it?

推荐答案

我想这是因为 NullPointerException异常您的应用程序崩溃。

I guess your app crashes because of NullPointerException.

更改此

ListView lv = (ListView)getActivity().findViewById(R.id.lv_contact);

到

ListView lv = (ListView)rootView.findViewById(R.id.lv_contact);

假设列表视图所属的片段布局。

assuming listview belongs to the fragment layout.

在code的其余部分看起来没事。

The rest of the code looks alright

编辑：

好了，因为你说这是行不通的我尝试过自己

Well since you said it is not working i tried it myself

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