个人觉得Fragment是一个很灵活的东西，用处很大，特别是在平板上等大屏幕的设备上面用处更大，如果不是很了解Fragment的请看这篇文章，觉得讲的很详细，不过讲一点，我在在3.0以下的版本不继承Activity,而是继承FragmentActivity，获取FragmentManager用getSupportFragmentManager()代替getFragmentManager().其他的看我推荐的那篇文章就行了，好了，接下来我们先来看看项目的效果（我明明弄得是动态图，怎么没反应呀呀呀）


android 不显示横竖xml android横竖屏不同布局_android

android 不显示横竖xml android横竖屏不同布局_java_02

上面的适合由列表进入详情的情况，我们先看下横竖屏的布局

1.竖屏布局，我们用的是FrameLayout，里面放置两个装Fragment的LinearLayout容器，这样的布局是重点


  

      
1. <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"  
2. xmlns:tools="http://schemas.android.com/tools"  
3. android:layout_width="match_parent"  
4. android:layout_height="match_parent" >  
5.       
6. <!-- 装载列表的Fragment 的容器 -->  
7. <LinearLayout   
8. android:id="@+id/list_container"  
9. android:layout_width="match_parent"  
10. android:layout_height="match_parent">  
11. </LinearLayout>  
12.       
13.       
14. <!-- 装载详情的Fragment 的容器 -->  
15. <LinearLayout   
16. android:id="@+id/detail_container"  
17. android:layout_width="match_parent"  
18. android:layout_height="match_parent">  
19. </LinearLayout>  
20.   
21. </FrameLayout>

2.横屏布局就比较简单，我们在res下新建一个layout-land文件夹，里面放置一个和上面同名的layout


  

      
1. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
2. xmlns:tools="http://schemas.android.com/tools"  
3. android:layout_width="match_parent"  
4. android:layout_height="match_parent" >  
5.       
6. <!-- 装载列表的Fragment 的容器 -->  
7. <LinearLayout   
8. android:id="@+id/list_container"  
9. android:layout_width="match_parent"  
10. android:layout_height="match_parent"  
11. android:layout_weight="2">  
12. </LinearLayout>  
13.       
14.       
15. <!-- 装载详情的Fragment 的容器 -->  
16. <LinearLayout   
17. android:id="@+id/detail_container"  
18. android:layout_width="match_parent"  
19. android:layout_height="match_parent"  
20. android:layout_weight="1">  
21. </LinearLayout>  
22.   
23. </LinearLayout>

3.新建一个列表Fragment,直接上代码吧，里面只有一个ListView用来显示列表数据


  

  
1. package com.example.fragmentdemo3;  
2.   
3. import java.util.ArrayList;  
4. import java.util.List;  
5.   
6. import android.content.res.Configuration;  
7. import android.os.Bundle;  
8. import android.support.v4.app.Fragment;  
9. import android.support.v4.app.FragmentManager;  
10. import android.support.v4.app.FragmentManager.OnBackStackChangedListener;  
11. import android.support.v4.app.FragmentTransaction;  
12. import android.view.LayoutInflater;  
13. import android.view.View;  
14. import android.view.ViewGroup;  
15. import android.widget.AdapterView;  
16. import android.widget.AdapterView.OnItemClickListener;  
17. import android.widget.ArrayAdapter;  
18. import android.widget.ListView;  
19. import android.widget.Toast;  
20.   
21. /**
22.  * 列表Fragment
23.  * @author mining
24.  *
25.  */  
26. public class FragmentList extends Fragment {  
27.       
28. private List<String> mDataSourceList = new ArrayList<String>();  
29. private List<FragmentTransaction> mBackStackList = new ArrayList<FragmentTransaction>();  
30.   
31.   
32. @Override  
33. public View onCreateView(LayoutInflater inflater, ViewGroup container,  
34.             Bundle savedInstanceState) {  
35. return inflater.inflate(R.layout.fragment_list_layout, container, false);  
36.     }  
37.       
38.       
39. @Override  
40. public void onActivityCreated(Bundle savedInstanceState) {  
41. super.onActivityCreated(savedInstanceState);  
42.           
43. //添加数据到ListView  
44. for(int i=0, count=20; i<count; i++){  
45. "列表数据" + i);  
46.         }  
47.           
48. //列表页面的ListView  
49.         ListView listView = (ListView) getActivity().findViewById(R.id.fragment_list);  
50. new ArrayAdapter(getActivity(), android.R.layout.simple_list_item_1, mDataSourceList));  
51.           
52. new OnItemClickListener() {  
53.   
54. @Override  
55. public void onItemClick(AdapterView<?> parent, View view,  
56. int position, long id) {  
57. //实例化详情Fragment  
58. new FragmentDetail();  
59.                   
60. //从列表页面传递需要的参数到详情页面  
61. new Bundle();  
62. "arg", mDataSourceList.get(position));  
63.                 detailFragment.setArguments(mBundle);  
64.                   
65. final FragmentManager fragmentManager = getActivity().getSupportFragmentManager();  
66. final FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();  
67.                   
68. //判断手机的横竖屏  
69.                 Configuration configuration = getActivity().getResources().getConfiguration();  
70. int ori = configuration.orientation;  
71.                   
72.                 fragmentTransaction.replace(R.id.detail_container, detailFragment);  
73.                   
74. if(ori == configuration.ORIENTATION_PORTRAIT){  
75. null);  
76.                 }  
77.                   
78.                 fragmentTransaction.commit();  
79.                   
80.                   
81.             }  
82.         });  
83.           
84.     }  
85.       
86. /**
87.      * 
88.      * @param msg
89.      */  
90. private void showTost(String msg){  
91.         Toast.makeText(getActivity(), msg, Toast.LENGTH_LONG).show();  
92.     }  
93.   
94. }

4.详情Fragment，实战中我们有时候需要从列表中传递参数到详情页面，我这里传递的是列表的显示数据，这里面也是一个ListView


  

      
1. package com.example.fragmentdemo3;  
2.   
3. import java.util.ArrayList;  
4. import java.util.List;  
5.   
6. import android.content.res.Configuration;  
7. import android.os.Bundle;  
8. import android.support.v4.app.Fragment;  
9. import android.view.LayoutInflater;  
10. import android.view.View;  
11. import android.view.ViewGroup;  
12. import android.widget.ArrayAdapter;  
13. import android.widget.LinearLayout;  
14. import android.widget.ListView;  
15.   
16. /**
17.  * 详情Fragment
18.  * @author mining
19.  *
20.  */  
21. public class FragmentDetail extends Fragment {  
22.   
23. @Override  
24. public View onCreateView(LayoutInflater inflater, ViewGroup container,  
25.             Bundle savedInstanceState) {  
26. return inflater.inflate(R.layout.fragment_detail_layout, container, false);  
27.     }  
28.       
29.       
30. @Override  
31. public void onActivityCreated(Bundle savedInstanceState) {  
32. super.onActivityCreated(savedInstanceState);  
33.           
34. //获取列表传来的参数  
35.         Bundle bundle = getArguments();  
36. "arg");  
37.           
38. new ArrayList<String>();  
39. for(int i=0, count=20; i<count; i++){  
40.             list.add(date);  
41.         }  
42.           
43.         LinearLayout layout = (LinearLayout) getActivity().findViewById(R.id.detail_container);  
44.           
45.         ListView listView = (ListView) getActivity().findViewById(R.id.fragment_detail);  
46. new ArrayAdapter(getActivity(), android.R.layout.simple_list_item_1, list));  
47.           
48.         Configuration configuration = getActivity().getResources().getConfiguration();  
49. int ori = configuration.orientation;  
50.       
51.     }  
52.
    1. }

    5.然后就是Activity，我们动态加载列表Fragment


      

          
1. package com.example.fragmentdemo3;  
2.   
3. import android.os.Bundle;  
4. import android.support.v4.app.Fragment;  
5. import android.support.v4.app.FragmentActivity;  
6. import android.support.v4.app.FragmentManager;  
7. import android.support.v4.app.FragmentTransaction;  
8.   
9. public class MainActivity extends FragmentActivity {  
10.   
11. @Override  
12. protected void onCreate(Bundle savedInstanceState) {  
13. super.onCreate(savedInstanceState);  
14.         setContentView(R.layout.activity_main);  
15.           
16. //列表页面需要显示的Fragment  
17. new FragmentList();  
18.           
19.         FragmentManager fragmentManager = getSupportFragmentManager();  
20.         FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();  
21.         fragmentTransaction.add(R.id.list_container, listFragment);  
22.           
23.         fragmentTransaction.commit();  
24.     }  
25.   
26.       
27.   
28. }