在AndroidManifest.xml中设置screenOrientation不起作用

我有一个简单的hello world Android测试项目。在我的AndroidManifest.xml中，我已经设置在AndroidManifest.xml中设置screenOrientation不起作用

android:screenOrientation="portrait" 
android:configChanges="keyboardHidden|keyboard|orientation">

但是当我调试我的代码中，变量isLandscape为True时，应认为是假

boolean isLandscape = getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE;

我知道我还可以设置活动方向的代码，但我需要将其设置为XML由于某些原因。我该怎么做？

编辑：我的AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
package="com.androidgames.mreater" 
android:versionCode="1" 
android:versionName="1.0" 
android:installLocation="preferExternal"> 

<uses-sdk 
    android:minSdkVersion="8" 
    android:targetSdkVersion="17" /> 

<uses-permission android:name="android.permission.WAKE_LOCK" /> 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 

<application 
    android:icon="@drawable/ic_launcher" 
    android:allowBackup="true" 
    android:label="Mr. Eater" > 
    <activity 
     android:name="com.androidgames.mreater.MrEaterGame" 
     android:label="Mr. Eater" 
     android:screenOrientation="portrait" 
     android:configChanges="keyboard|keyboardHidden|orientation|screenSize"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 
      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
</application>

我的实际活动的onCreate方法：

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    boolean isLandscape = getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE; 

    requestWindowFeature(Window.FEATURE_NO_TITLE); 
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
      WindowManager.LayoutParams.FLAG_FULLSCREEN); 

    int frameBufferWidth = isLandscape ? 480 : 320; 
    int frameBufferHeight = isLandscape ? 320 : 480; 
    Bitmap frameBuffer = Bitmap.createBitmap(frameBufferWidth, 
      frameBufferHeight, Config.RGB_565); 

    float scaleX = (float) frameBufferWidth 
      /getWindowManager().getDefaultDisplay().getWidth(); 
    float scaleY = (float) frameBufferHeight 
      /getWindowManager().getDefaultDisplay().getHeight(); 

    renderView = new AndroidFastRenderView(this, frameBuffer); 
    graphics = new AndroidGraphics(getAssets(), frameBuffer); 
    fileIO = new AndroidFileIO(getAssets()); 
    audio = new AndroidAudio(this); 
    input = new AndroidInput(this, renderView, scaleX, scaleY); 
    screen = this.getStartScreen(); 
    setContentView(renderView); 

    PowerManager powerManager = (PowerManager) getSystemService(Context.POWER_SERVICE); 
    wakeLock = powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK, "GLGame"); 
}

现在，它变得越来越怪异，在isLandscape变量为真，但有时它是假。它有点像一个错误。

来源

2013-06-26 Cuồn Yết

定义每个Activity请问屏幕方向实际上改变或者仅仅是该变量返回true ？ – codeMagic

您正在将它设置在活动标签上吗？不把它放在应用程序标签中？ http://developer.android.com/guide/topics/manifest/activity-element.html#screen –

活动屏幕是横向的，而不是像我想要的那样纵向。 –