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