ListFragment继承于Fragment。因此它具有Fragment的特性，能够作为activity中的一部分，目的也是为了使页面设计更加灵活。
相比Fragment，ListFragment的内容是以列表(list)的形式显示的。ListFragment的布局默认包含一个ListView。因此，在ListFragment对应的布局文件中，必须指定一个 android:id 为 “@android:id/list” 的ListView控件!
ListFragment基础使用
下面介绍在Activity中显示ListFragment的步骤。
1. Activity对应的代码
public class FragmentTest extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
2. Activity对应的布局
说明：该Activity的布局中只包行了一个Fragment。下面看看MyListFragment的内容。
3. MyListFragment的内容
public class MyListFragment extends ListFragment {
private static final String TAG = "##MyListFragment##";
private ListView selfList;
String[] cities = {
"Shenzhen",
"Beijing",
"Shanghai",
"Guangzhou",
"Wuhan",
"Tianjing",
"Changsha",
"Xi'an",
"Chongqing",
"Guilin",
};
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Log.d(TAG, "onCreateView");
return inflater.inflate(R.layout.list_fragment, container, false);
}
@Override
public void onCreate(Bundle savedInstanceState) {
Log.d(TAG, "onCreate");
super.onCreate(savedInstanceState);
// 设置ListFragment默认的ListView，即@id/android:list
this.setListAdapter(new ArrayAdapter(getActivity(),
android.R.layout.simple_list_item_1, cities));
}
public void onListItemClick(ListView parent, View v,
int position, long id) {
Log.d(TAG, "onListItemClick");
Toast.makeText(getActivity(), "You have selected " + cities[position],
Toast.LENGTH_SHORT).show();
}
}
说明：MyListFragment是自定义的ListFragment。它使用了list_fragment.xml作为布局，并通过android.R.layout.simple_list_item_1显示ListView中的每一项。
4. list_fragment.xml的内容
<&＃63;xml version="1.0" encoding="utf-8"&＃63;>
"Activity的布局以及代码"和前面一样，这里就不再重复说明。
5. MyListFragment的内容
public class MyListFragment extends ListFragment {
private static final String TAG = "##MyListFragment##";
private ListView selfList;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Log.d(TAG, "onCreateView");
return inflater.inflate(R.layout.list_fragment, container, false);
}
@Override
public void onCreate(Bundle savedInstanceState) {
final String[] from = new String[] {"title", "info"};
final int[] to = new int[] {R.id.text1, R.id.text2};
Log.d(TAG, "onCreate");
super.onCreate(savedInstanceState);
// 建立SimpleAdapter，将from和to对应起来
SimpleAdapter adapter = new SimpleAdapter(
this.getActivity(), getSimpleData(),
R.layout.item, from, to);
this.setListAdapter(adapter);
}
public void onListItemClick(ListView parent, View v,
int position, long id) {
Log.d(TAG, "onListItemClick");
Toast.makeText(getActivity(),
"You have selected " + position,
Toast.LENGTH_SHORT).show();
}
private List> getSimpleData() {
List> list = new ArrayList>();
Map map = new HashMap();
map.put("title", "Ferris wheel");
map.put("info", "Suzhou Ferris wheel");
list.add(map);
map = new HashMap();
map.put("title", "Flower");
map.put("info", "Roser");
list.add(map);
map = new HashMap();
map.put("title", "Disk");
map.put("info", "Song Disk");
list.add(map);
return list;
}
}
说明：MyListFragment使用了R.layout.list_fragment作为布局，并且对于ListView中的每一项都使用了R.layout.item作为布局。
6. list_fragment.xml的内容
android:layout_
android:layout_
android:drawSelectorOnTop="false"
/>
7. item.xml的内容
<&＃63;xml version="1.0" encoding="utf-8"&＃63;>
ListFragment实例
应用实例说明：建立一个activity，包括2个ListFragment。第1个ListFragment采用中ListView每一行的内容通过android自带的android.R.layout.simple_list_item_1布局来显示；第2个ListFragment每一行的内容通过自定义的layout文件来显示，每一行显示两个文本。
activity对应的layout文件代码：
说明：
(01) 该layout布局包含两个fragment。
activity的代码：
package com.skywang.app;
import android.os.Bundle;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.view.Menu;
public class ListFragmentTest extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.list_fragment_test);
}
}
说明：
(01) 在 onCreateView()中，调用list_fragment_impl作为该ListFragment的布局文件。
(02) 在 onCreate()中，通过setListAdapter() 设置android.R.layout.simple_list_item_1为ListView每一行的布局文件，设置cities为其中数据的每一项内容。
ListFragmentImpl.java的代码：
package com.skywang.app;
import android.app.ListFragment;
import android.widget.ListView;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.util.Log;
import android.widget.Toast;
import android.widget.SimpleAdapter;
import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.util.ArrayList;
public class ListFragmentImpl extends ListFragment{
private static final String TAG = "ListFragmentImpl";
private ListView selfList;
String[] cities = {
"Shenzhen",
"Beijing",
"Shanghai",
"Guangzhou",
"Wuhan",
"Tianjing",
"Changsha",
"Xi'an",
"Chongqing",
"Guilin",
};
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Log.d(TAG, "onCreateView");
return inflater.inflate(R.layout.list_fragment_impl, container, false);
}
@Override
public void onCreate(Bundle savedInstanceState) {
Log.d(TAG, "onCreate");
super.onCreate(savedInstanceState);
// 设置ListFragment默认的ListView，即@id/android:list
this.setListAdapter(new ArrayAdapter(getActivity(),
android.R.layout.simple_list_item_1, cities));
}
public void onListItemClick(ListView parent, View v,
int position, long id) {
Log.d(TAG, "onListItemClick");
Toast.makeText(getActivity(),
"You have selected " + cities[position],
Toast.LENGTH_SHORT).show();
}
}
list_fragment_impl.xml的内容：
<&＃63;xml version="1.0" encoding="utf-8"&＃63;>
ListFragmentSelf.java的代码：
package com.skywang.app;
import android.app.ListFragment;
import android.widget.ListView;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.util.Log;
import android.widget.Toast;
import android.widget.SimpleAdapter;
import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.util.ArrayList;
public class ListFragmentSelf extends ListFragment{
private static final String TAG = "ListFragmentImpl";
private ListView selfList;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Log.d(TAG, "onCreateView");
return inflater.inflate(R.layout.list_fragment_self, container, false);
}
@Override
public void onCreate(Bundle savedInstanceState) {
final String[] from = new String[] {"title", "info"};
final int[] to = new int[] {R.id.text1, R.id.text2};
Log.d(TAG, "onCreate");
super.onCreate(savedInstanceState);
// 建立SimpleAdapter，将from和to对应起来
SimpleAdapter adapter = new SimpleAdapter(
this.getActivity(), getSimpleData(),
R.layout.two_textview, from, to);
this.setListAdapter(adapter);
}
public void onListItemClick(ListView parent, View v,
int position, long id) {
Log.d(TAG, "onListItemClick");
Toast.makeText(getActivity(),
"You have selected " + position,
Toast.LENGTH_SHORT).show();
}
private List> getSimpleData() {
List> list = new ArrayList>();
Map map = new HashMap();
map.put("title", "Ferris wheel");
map.put("info", "Suzhou Ferris wheel");
list.add(map);
map = new HashMap();
map.put("title", "Flower");
map.put("info", "Roser");
list.add(map);
map = new HashMap();
map.put("title", "Disk");
map.put("info", "Song Disk");
list.add(map);
return list;
}
}
说明：
(01) 在 onCreateView()中，调用list_fragment_self作为该ListFragment的布局文件。
(02) 在 onCreate()中，通过setListAdapter() 设置R.layout.two_textview为ListView每一行的布局文件。
list_fragment_self.xml的内容：
<&＃63;xml version="1.0" encoding="utf-8"&＃63;>
two_textview.xml的内容:
<&＃63;xml version="1.0" encoding="utf-8"&＃63;>
效果图：
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