Android开发笔记（13）——ListFragment

莫问天涯路几重，轻衫侧帽且从容。这篇文章主要讲述Android开发笔记（13）——ListFragment相关的知识，希望能为你提供帮助。
android开发笔记（13）——ListFragment
转载请注明：http://www.cnblogs.com/igoslly/p/6959108.html
ListFragment
ListFragment是继承于Fragment的类，专门用于包含ListView的布局文件设置。
当然如果你不想了解ListFragment，通过使用普通Fragment进行setAdapter设置亦是可以的，普通ListView设置参见前章：http://www.cnblogs.com/igoslly/p/6947225.html

配置ListFragment通常涉及3个Layout文件：
1、包含Fragment的主Activity Layout：activity_main.xml （可直接静态添加fragment，或设置framelayout动态添加）
2、应用ListFragment的 Layout：history_list.xml
ListFragment的布局默认包含一个listVew，命名为：“@id/android:id” （和普通命名语法不同）
还可另设 TextView 用于无数据时显示，命名为：“@id/android:empty”
3、布局中ListView每个item的设置Layout：history_list_competition.xml

以下我实际应用所写的实例，使用的是动态添加fragment，自定义BaseAdapter的方法。
—— ArrayAdapter & SimpleAdapter的设置更为简单，可参考前章
—— 静态添加fragment的方法，即是一个函数findViewById 和 findViewByTag的区别，也可详见苏白的专栏：http://blog.csdn.net/kakaxi1o1/article/details/29368645

activity_main.xml

< LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> < LinearLayout android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:id="@+id/history_list" android:orientation="vertical"> < /LinearLayout> < /LinearLayout>

historyFragment.java
在 onCreateView()中，调用 history_list.xml 作为该ListFragment的布局文件。

fragmentTranscation.replace(R.id.history_list, historyListFragment).commit();

动态添加historyListFragment，并替换原有fragment

public class HistoryFragment extends Fragment { private FragmentManager fragmentManager; public HistoryFragment() { }@Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.history_list, container, false); return rootView; }@Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); Button competition_selected = (Button) getActivity().findViewById(R.id.history_competition); competition_selected.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { fragmentManager = getFragmentManager(); fragmentTranscation = fragmentManager.beginTransaction(); HistoryListFragment historyListFragment = new HistoryListFragment(); fragmentTranscation.replace(R.id.history_list, historyListFragment).commit(); }} ); } }

history_list.xml

< LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:id="@+id/list_content"> < ListView android:id="@id/android:list" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="8dp"/> < TextView android:id="@id/android:empty" android:layout_width="match_parent" android:layout_height="match_parent" android:text=""/> < /LinearLayout>

history_list_competition.xml
设置ListView的每个item的布局格式

< LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> < LinearLayout android:layout_width="0dp" android:layout_weight="8" android:layout_height="match_parent" android:orientation="vertical"> < TextView android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:text="Null" android:textSize="20sp" android:padding="2dp" android:textColor="@color/black" android:id="@+id/list_competition_player"/> < TextView android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:text="Null" android:textSize="16sp" android:padding="2dp" android:id="@+id/list_competition_date"/> < /LinearLayout> < LinearLayout android:layout_width="0dp" android:layout_weight="3" android:layout_height="match_parent"> < TextView android:layout_width="match_parent" android:layout_height="match_parent" android:text="100" android:gravity="center" android:textSize="24sp" android:textColor="@color/black" android:id="@+id/list_competition_scoreA"/> < /LinearLayout> < LinearLayout android:layout_width="0dp" android:layout_weight="1" android:layout_height="match_parent"> < TextView android:layout_width="match_parent" android:layout_height="match_parent" android:text="—" android:gravity="center" android:textSize="28sp"/> < /LinearLayout> < LinearLayout android:layout_width="0dp" android:layout_weight="3" android:layout_height="match_parent"> < TextView android:layout_width="match_parent" android:layout_height="match_parent" android:text="100" android:gravity="center" android:textSize="24sp" android:textColor="@color/black" android:id="@+id/list_competition_scoreB"/> < /LinearLayout> < /LinearLayout>

HistoryListFragment.java
在 onCreate()中，通过setListAdapter() 设置R.layout.history_list_competition。或者使用系统的默认的R.layout.simple_list_item_1；
添加ListView的点击事件；自定义BaseAdapter；
注意！如需使用本Java代码，请另行添加具体List< Map< String,Object> > 值，否则会报错。

public class HistoryListFragment extends ListFragment {private CompetitionListAdapter adapter; private List< Map< String,Object> > competitionlist; // 构造函数 public HistoryListFragment(){} @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); competitionlist = new ArrayList< Map< String,Object> > (); adapter = new CompetitionListAdapter(getActivity()); //绑定适配器时，必须通过ListFragment.setListAdapter()接口，而不是ListView.setAdapter()或其它方法 this.setListAdapter(adapter); }// 创建窗口 @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.history_list, container, false); }// 设置点击事件 @Override public void onListItemClick(ListView l, View v, int position, long id) { super.onListItemClick(l, v, position, id); HashMap< String, Object> item =(HashMap< String, Object> ) adapter.getItem(position); String scoreA = (String)item.get("scoreA"); String scoreB= (String)item.get("scoreB"); String log = (String)item.get("log"); }// 自定义 CompetitionListAdapter 继承于BaseAdapter public class CompetitionListAdapter extends BaseAdapter { private LayoutInflater mInflater=null; public CompetitionListAdapter(Context context){ this.mInflater=LayoutInflater.from(context); } @Override public int getCount(){ returncompetitionlist.size(); } @Override public Object getItem(int position){ return competitionlist.get(position); } @Override public long getItemId(int position){ return position; } @Override public View getView(int position, View convertView, ViewGroup parent){ ViewHolder holder = null; if (convertView ==null){ holder = new ViewHolder(); convertView = mInflater.inflate(R.layout.history_list_competition,null); holder.date=(TextView)convertView.findViewById(R.id.list_competition_date); holder.scoreA=(TextView)convertView.findViewById(R.id.list_competition_scoreA); holder.scoreB=(TextView) convertView.findViewById(R.id.list_competition_scoreB); holder.player=(TextView)convertView.findViewById(R.id.list_competition_player); convertView.setTag(holder); }else { holder = (ViewHolder)convertView.getTag(); } holder.date.setText((String)competitionlist.get(position).get("date")); holder.scoreA.setText((String)competitionlist.get(position).get("scoreA")); holder.scoreB.setText((String)competitionlist.get(position).get("scoreB")); holder.player.setText((String)competitionlist.get(position).get("player")); return convertView; }private class ViewHolder{ public TextView date; public TextView player; public TextView scoreB; public TextView scoreA; } } }

总体效果图如下：