关于android:screenOrientation="portrait"

当在AndroidManifest.xml文件中定义了android:screenOrientation="portrait"，就表示当我们切换横竖屏的时候，屏幕的内容始终以竖屏显示，而不会根据屏幕的方向来显示内容

AndroidManifest.xml文件

 

  
    

   
     <?
   
     xml version="1.0" encoding="utf-8"
   
     ?>
   
     

   
     <
   
     manifest 
   
     xmlns:android
   
     ="http://schemas.android.com/apk/res/android"
   
     
 package
   
     ="com.test"
   
     
 android:versionCode
   
     ="1"
   
     
 android:versionName
   
     ="1.0"
   
     >
   
     
 
   
     <
   
     uses-sdk 
   
     android:minSdkVersion
   
     ="8"
   
      
   
     />
   
     

 
   
     <
   
     application 
   
     android:icon
   
     ="@drawable/icon"
   
      android:label
   
     ="@string/app_name"
   
     >
   
     
 
   
     <
   
     activity 
   
     android:name
   
     =".TestActivity"
   
     
 android:label
   
     ="@string/app_name"
   
     
   
     
 android:screenOrientation
   
     ="portrait"
   
     >
   
     
 
   
     <
   
     intent-filter
   
     >
   
     
 
   
     <
   
     action 
   
     android:name
   
     ="android.intent.action.MAIN"
   
      
   
     />
   
     
 
   
     <
   
     category 
   
     android:name
   
     ="android.intent.category.LAUNCHER"
   
      
   
     />
   
     
 
   
     </
   
     intent-filter
   
     >
   
     
 
   
     </
   
     activity
   
     >
   
     

 
   
     </
   
     application
   
     >
   
     

   
     </
   
     manifest
   
     >
  
    

main.xml文件

  
    

   
     <?
   
     xml version="1.0" encoding="utf-8"
   
     ?>
   
     

   
     <
   
     LinearLayout 
   
     xmlns:android
   
     ="http://schemas.android.com/apk/res/android"
   
     
 android:orientation
   
     ="vertical"
   
     
 android:layout_width
   
     ="fill_parent"
   
     
 android:layout_height
   
     ="fill_parent"
   
     
 
   
     >
   
     
 
   
     <
   
     TextView 
 
   
     android:id
   
     ="@+id/tv"
   
     
 android:layout_width
   
     ="fill_parent"
   
      
 android:layout_height
   
     ="wrap_content"
   
      
 android:text
   
     ="横竖屏切换测试"
   
     
 
   
     />
   
     
 
   
     <
   
     EditText 
 
   
     android:layout_width
   
     ="fill_parent"
   
      
 android:layout_height
   
     ="wrap_content"
   
      
 android:id
   
     ="@+id/et"
   
     
 
   
     />
   
     

   
     </
   
     LinearLayout
   
     >
  
    

TestActivity.java文件

  
    

   
     package
   
      com.test;


   
     import
   
      android.app.Activity;

   
     import
   
      android.content.res.Configuration;

   
     import
   
      android.os.Bundle;

   
     import
   
      android.widget.EditText;

   
     import
   
      android.widget.TextView;


   
     public
   
      
   
     class
   
      TestActivity 
   
     extends
   
      Activity {
 EditText et;
 TextView tv;
 @Override
 
   
     public
   
      
   
     void
   
      onCreate(Bundle savedInstanceState) {
 
   
     super
   
     .onCreate(savedInstanceState);
 setContentView(R.layout.main);
 et 
   
     =
   
      (EditText) findViewById(R.id.et);
 tv 
   
     =
   
      (TextView) findViewById(R.id.tv);
 System.out.println(
   
     "
   
     我是onCreate方法
   
     "
   
     );
 }
 @Override
 
   
     public
   
      
   
     void
   
      onConfigurationChanged(Configuration newConfig) {
 
   
     super
   
     .onConfigurationChanged(newConfig);
 
   
     if
   
     (newConfig.orientation 
   
     ==
   
      Configuration.ORIENTATION_LANDSCAPE){
 tv.setText(
   
     "
   
     横屏
   
     "
   
     );
 }
   
     else
   
     {
 tv.setText(
   
     "
   
     竖屏
   
     "
   
     );
 }
 
 }
}
  
    

可以亲测一下，以验证我刚才说的结论