【发布时间】：2013-10-19 10:04:55
【问题描述】：
我有一个片段 FragmentTab1 并且我想替换由一个列表视图和两个按钮组成的 AllContactsFragment 片段。替换效果很好，但 ListView 中没有显示数据。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 内的 listview 中填写数据，例如：
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) {
}
}
我还分享了我的 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 对应的 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>
可能是我遗漏了什么吗？
已编辑：使上述代码正确。
从 ListView 定义 XML 中删除 android:layout_below="@+id/imageViewLine1" ，从适配器中的 getView() 中删除 return null 并检查设置为 listview 的数据是否可用。
【问题讨论】：
-
为什么要尝试在
getView中捕获并删除这个return null -
也删除此
if (container == null) { return null; }并尝试 -
你有这个
android:layout_below="@+id/imageViewLine1"id为imageViewLine1的视图 -
@Raghunandan：听从您的建议
-
@Raghunandan 仍然无法正常工作..
标签： java android android-listview android-fragments actionbarsherlock