Question

我有一个片段 FragmentTab1 ＆amp;我想替换 AllContactsFragment 片段，其中包含listview＆amp;两个按钮。替换效果很好，但数据未显示在 ListView 中。数据也显示在log cat中。

FragmentTab1里面的替换代码是：

AllContactsFragment allContactsFragment = new AllContactsFragment();
FragmentTransaction transaction = getFragmentManager()
                .beginTransaction();
transaction.addToBackStack(null);
transaction.add(R.id.fragmentTabLayout1, allContactsFragment);
transaction.commit();

我在AllContactsFragment里面的listview中填充数据，如：

    public class AllContactsFragment extends SherlockFragment implements
        OnClickListener {

    ListView listViewAllContact;
    Button btnAdd, btnCacel;
    List<BlockNumber> contactNumberlist;
    View rootView;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        rootView = inflater.inflate(R.layout.fragment_all_contacts, container,
                false);
        // data are comes well & checked in Log cat
        contactNumberlist = PhoneUtils.getAllContacts(getActivity());
        listViewAllContact = (ListView) rootView
                .findViewById(R.id.listViewAllContact);

        ContactListAdapter adapter = new ContactListAdapter(getActivity(),
                contactNumberlist, m_onSelectedEventCalender);

        listViewAllContact.setAdapter(adapter);

        if (container == null) {
            return null;
        }
        return rootView;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

    }
    @Override
    public void onClick(View v) {

    } 
}

我也分享我的ContactListAdapter适配器

   public class ContactListAdapter extends BaseAdapter {

    private List<BlockNumber> allContactsNumbers = null;
    public Context context;
    public LayoutInflater inflater;
    private ViewHolder holder;

    private onSelectedEventCalender m_onSelectedEventCalender;

    public ContactListAdapter(Context context, List<BlockNumber> allNumberList,
            onSelectedEventCalender m_onSelectedEventCalender) {

        super();
        this.context = context;
        this.allContactsNumbers = allNumberList;
        this.inflater = (LayoutInflater) this.context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        this.m_onSelectedEventCalender = m_onSelectedEventCalender;
    }

    @Override
    public int getCount() {

        return allContactsNumbers.size();
    }

    @Override
    public Object getItem(int position) {

        return position;
    }

    @Override
    public long getItemId(int position) {

        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        try {

            if (convertView == null) {
                holder = new ViewHolder();

                convertView = inflater.inflate(R.layout.list_row, null);
                convertView.setMinimumHeight(50);

                holder.textViewContactName = (TextView) convertView
                        .findViewById(R.id.textview_contact_name);

                holder.textView_Contact_Number = (TextView) convertView
                        .findViewById(R.id.textview_number);

                convertView.setTag(holder);

            } else {
                holder = (ViewHolder) convertView.getTag();

                holder.textViewContactName.setText(allContactsNumbers.get(
                        position).getName());

                holder.textView_Contact_Number.setText(allContactsNumbers.get(
                        position).getNumber());

                holder.textViewContactName.setTag(allContactsNumbers
                        .get(position));

                return convertView;
            }

        } catch (Exception ex) {
            Log.w("Exception", ex.getMessage());
        }

        return null;

    }

    public static class ViewHolder {

        TextView textViewContactName;
        TextView textView_Contact_Number;
        // TextView textViewEventEndDate;
    }

    public interface onSelectedEventCalender {
        void onSelectedEventCalender(BlockNumber aBlockNumber, int type);

    }
}

AllContactsFragment的相应XML是fragment_all_contacts.xml：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/bg_new" >

<!-- android:background="#80000000" -->

<RelativeLayout
    android:id="@+id/relativeLayoutFragmentMain"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <ListView
        android:id="@+id/listViewAllContact"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/imageViewLine1" >
    </ListView>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dip"
        android:layout_alignParentBottom="true"
        android:background="@drawable/action_bar"
        android:gravity="center_vertical"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/btnAdd"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="8dip"
            android:layout_weight="1"
            android:text="Add" />

        <Button
            android:id="@+id/btnCanel"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginRight="8dip"
            android:layout_weight="1"
            android:text="Home" />
    </LinearLayout>
</RelativeLayout>
</RelativeLayout>

可能是我错过了什么？

已修改：使上述代码正确。

删除android：layout_below =＆＃34; @ + id / imageViewLine1＆＃34;从ListView定义XML中，从适配器＆amp;中的getView（）中删除return null。检查数据是否可用，设置为listview。

Answer 1

我会尝试

1）在xml中将listview设置为“线性布局 - 按钮 - 栏”之上“

2）创建ContactListAdapter适配器后调用adapter.notifyDataSetChanged（）

3）在适配器中的第一个if - after convertView.setTag（holder）; set return convertView;

4）在onViewCreated（）方法

中创建并设置适配器

或

用imageview替换你的listview一次，看看你是否会看到图像，而不是你知道listview是失败的那个（不要忘记设置背景！）

Answer 2

窝！我多么愚蠢？我的 contactNumberlist 为空，因为我没有在列表中添加该对象。我的Log cat误导了我。感谢@Ragunandan＆amp; @tom贵族因为能够找到错误而负担得起。

我的ContactListAdapter getView（）看起来像：

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    if (convertView == null) {
        holder = new ViewHolder();

        convertView = inflater.inflate(R.layout.list_row, null);
        convertView.setMinimumHeight(50);

        holder.textViewContactName = (TextView) convertView
                .findViewById(R.id.textview_contact_name);
        holder.textView_Contact_Number = (TextView) convertView
                .findViewById(R.id.textview_number);
        holder.imgViewContactImage = (ImageView) convertView
                .findViewById(R.id.imgViewContactImage);

        convertView.setTag(holder);

    } else
        holder = (ViewHolder) convertView.getTag();

    if (allContactsNumbers.size() <= 0) {
        holder.textViewContactName.setText("No Data");

    } else {
        holder = (ViewHolder) convertView.getTag();

        String name = allContactsNumbers.get(position).getName();
        holder.textViewContactName.setText(name);

        String number = allContactsNumbers.get(position).getNumber();
        holder.textView_Contact_Number.setText(number);

        Uri Uri = allContactsNumbers.get(position).getImage_Uri();
        if (Uri != null) {
            holder.imgViewContactImage.setImageURI(Uri);
        } else {
            holder.imgViewContactImage.setImageResource(R.drawable.ic_no_image);
        }

        Log.d("Contacts in Adapter", "" + name + "" + number);

    }
    return convertView;
}

listview数据不显示在片段中

2 个答案: