fragment的切换

1、视图

1)主视图

 <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"
     android:orientation="horizontal"
     tools:context=".MainActivity" >

 </LinearLayout>

2)fragment1视图

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="#ff0000"
     android:orientation="vertical" >

 </LinearLayout>

3)fragment2视图

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="#0000ff"
     android:orientation="vertical" >

 </LinearLayout>

2、java代码

1)切换代码

 package com.example.myfragment;

 import android.os.Bundle;
 import android.app.Activity;
 import android.app.FragmentManager;
 import android.app.FragmentTransaction;
 import android.view.Menu;

 public class MainActivity extends Activity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);

         //判断手机当前朝向
         int width = getWindowManager().getDefaultDisplay().getWidth();
         int height = getWindowManager().getDefaultDisplay().getHeight();

         Fragment1 fragment1 = new Fragment1();
         Fragment2 fragment2 = new Fragment2();
         FragmentManager fm = getFragmentManager();
         FragmentTransaction ft = fm.beginTransaction();
         //R.id.content说明是当前的模板
         if(width > height){
             //水平
             ft.replace(android.R.id.content, fragment1);
         }else{
             //垂直
             ft.replace(android.R.id.content, fragment2);
         }

         ft.commit();
     }

 }

2)fragment1和fragment2代码

 package com.example.myfragment;

 import android.app.Fragment;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

 public class Fragment2 extends Fragment {

     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {
         // TODO Auto-generated method stub
         return inflater.inflate(R.layout.fragment2, null);
     }

 }