通过近期空暇时候对Fragment的学习，尝试着写了一个小Demo，将在开发的时候能经常使用到的Fragment知识放在一起，写过了这个Demo对Android Fragment的了解更加深入了，以后做起有关的项目也会顺手非常多，以下先贴上几张实现之后的图片：

实现的功能非常easy，也是最主要的，上下各自是两个Fragment，上面的Fragment中是一个listview，当点击item时，以下的Fragment显示相应的文字具体信息：

详细的实现过程例如以下：

①创建projectFragmentExam，文件夹视图例如以下(把之前的FragmentPreference的demo也加到了一起)：

②main.xml文件布局，垂直方向上两个Fragment，用<Fragment>标签声明

<LinearLayout 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"    tools:context=".MainActivity"     android:orientation="vertical"    android:background="#7ecef4">	<fragment 	    android:name="com.example.fragementexam.FragementList"	    android:id="@+id/frag_list"	    android:layout_width="fill_parent"	    android:layout_height="0dp"	    android:layout_weight="2"/>	<fragment 	    android:name="com.example.fragementexam.FragementDetails"	    android:id="@+id/frag_detail"	    android:layout_width="fill_parent"	    android:layout_height="0dp"	    android:layout_weight="1"/></LinearLayout>

③FragmentList.java的代码,它继承了ListFragment，注意在onCreateView方法中使用inflater的inflate方法将布局页面引进：

package com.example.fragementexam;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.app.ListFragment;import android.os.Bundle;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ListView;import android.widget.SimpleAdapter;public class FragementList extends ListFragment {	private String[] values = new String[] { "侏儒", "人类", "暗夜精灵", "矮人", "德莱尼",			"狼人" };	private int[] images = new int[] { R.drawable.gnome,			R.drawable.human, R.drawable.nightelf,			R.drawable.dwarf, R.drawable.draenei,			R.drawable.werewolf };	@Override	public View onCreateView(LayoutInflater inflater, ViewGroup container,			Bundle savedInstanceState) {		return inflater.inflate(R.layout.frag_list, container, false);	}	@Override	public void onActivityCreated(Bundle savedInstanceState) {		super.onActivityCreated(savedInstanceState);		List<Map<String, Object>> listItems = new ArrayList<Map<String, Object>>();		for (int i = 0; i < values.length; i++) {			Map<String, Object> listItem = new HashMap<String, Object>();			listItem.put("values", values[i]);			listItem.put("images", images[i]);			listItems.add(listItem);		}		SimpleAdapter adapter = new SimpleAdapter(getActivity(), listItems,				R.layout.list_item, new String[] { "values", "images" },				new int[] { R.id.txt_title, R.id.img });		setListAdapter(adapter);	}	@Override	public void onListItemClick(ListView l, View v, int position, long id) {		// String item = (String) getListAdapter().getItem(position);		FragementDetails frag = (FragementDetails) getFragmentManager()				.findFragmentById(R.id.frag_detail);		if (frag != null && frag.isInLayout()) {			switch (position) {			case 0:				frag.setText(getString(R.string.Gnome));				break;			case 1:				frag.setText(getString(R.string.Human));				break;			case 2:				frag.setText(getString(R.string.NightElf));				break;			case 3:				frag.setText(getString(R.string.Dwarf));				break;			case 4:				frag.setText(getString(R.string.Draenei));				break;			case 5:				frag.setText(getString(R.string.Werewolf));				break;			}		}		Log.i("PDA", "position = " + position);	}}

④FragementDetails.java的代码，这个比較简单，里面有一个设置TextView内容的方法，其布局页面也不过一个TextView

package com.example.fragementexam;import android.app.Fragment;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;public class FragementDetails extends Fragment {	@Override	public View onCreateView(LayoutInflater inflater, ViewGroup container,			Bundle savedInstanceState) {		// TODO Auto-generated method stub		return inflater.inflate(R.layout.frag_detail, container,false);	}		public void setText(String item){		TextView txt = (TextView) getView().findViewById(R.id.txt_detail);		txt.setText(item);	}	}