为什么我的应用程序停止支持屏幕方向更改？

Question

我用一个基本的Toast消息和选项菜单创建了一个新的Android应用程序。一段时间以来，该应用程序支持方向更改没有问题，但现在它似乎不再关心自动旋转。是否有一些魔术设置，我不知道它擦拭或设置？从字面上看，自从我第一次创建代码以来就没有任何代码更改，并且它没有问题。

的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
     package="com.somedomain.appname" 
     android:versionCode="1" 
     android:versionName="1.0"> 
    <uses-sdk android:minSdkVersion="4" /> 
    <application android:icon="@drawable/icon" android:label="@string/app_name" android:debuggable="true"> 
     <activity android:name=".StartActivity" android:label="@string/app_name"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 
       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
    </application> 
</manifest> 

StartActivity.java

package com.somedomain.appname; 

import android.app.Activity; 
import android.os.Bundle; 
import android.view.Gravity; 
import android.view.LayoutInflater; 
import android.view.Menu; 
import android.view.MenuInflater; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.Toast; 

/** Main Activity **/ 
public class AppName extends Activity { 

    /** Called when someone specifies to view the options menu **/ 
    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 

     // Set 
     MenuInflater inflater = getMenuInflater(); 
     inflater.inflate(R.menu.navigate, menu); 

     // Return 
     return true; 
    } 

    /* Handle options menu selections */ 
    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 

     // Handle item selection 
     switch (item.getItemId()) { 

      case R.id.itemNewGame: 
       // New Game 
       return true; 
      case R.id.itemSettings: 
       // Settings 
       return true; 
      case R.id.itemAbout: 
       // About 
       return true; 
      default: 
       return super.onOptionsItemSelected(item); 
     } 

    } 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 

     // Super 
     super.onCreate(savedInstanceState); 

     // Set 
     setContentView(R.layout.main);  

     // First time? 
     if (savedInstanceState == null) // null the first time 
     {   
      // Splash 
      LayoutInflater inflater = getLayoutInflater(); 
      View layout = inflater.inflate(R.layout.splash, (ViewGroup) findViewById(R.id.frameLayout1)); 
      Toast toast = new Toast(getApplicationContext()); 
      toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0); 
      toast.setDuration(Toast.LENGTH_LONG); 
      toast.setView(layout); 
      toast.show(); 
     } 
    } 

} 

main.xml中

<?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"> 
</LinearLayout> 

splash.xml

<?xml version="1.0" encoding="utf-8"?> 
    <FrameLayout android:id="@+id/frameLayout1" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android">  
    <ImageView 
android:src="@drawable/logo" src="@drawable/logo" android:layout_height="fill_parent" android:layout_width="fill_parent" android:scaleType="centerInside" android:padding="30dip"/> 
    </FrameLayout> 

Answer 1

请检查您是否已经对手机的旋转使，有时我忘了太：P