title: requestWindowFeature(Window.FEATURE_NO_TITLE); gives the exception
body: <pre><code>import android.content.pm.ActivityInfo;
  import android.os.Bundle;
  import android.preference.ListPreference;
  import android.preference.Preference;
  import android.preference.PreferenceActivity;
  import android.util.Log;
  import android.view.Window;
  import android.view.WindowManager;
  
  public class OptionsActivity extends PreferenceActivity {
   private ListPreference mListPreference;
  
   @Override
   protected void onCreate (Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
  
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
  
    addPreferencesFromResource(R.xml.options);
    mListPreference = (ListPreference) findPreference("listpreference");
    mListPreference.setPersistent(false);  
  
   }
  }
  
  Exception Stacktrace is given below:
  01-27 12:35:51.920: ERROR/AndroidRuntime(615): FATAL EXCEPTION: main
  01-27 12:35:51.920: ERROR/AndroidRuntime(615): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.game/com.android.game.OptionsActivity}: android.util.AndroidRuntimeException: requestFeature() must be called before adding content
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at android.os.Handler.dispatchMessage(Handler.java:99)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at android.os.Looper.loop(Looper.java:123)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at android.app.ActivityThread.main(ActivityThread.java:4627)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at java.lang.reflect.Method.invokeNative(Native Method)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at java.lang.reflect.Method.invoke(Method.java:521)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at dalvik.system.NativeStart.main(Native Method)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615): Caused by: android.util.AndroidRuntimeException: requestFeature() must be called before adding content
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at com.android.internal.policy.impl.PhoneWindow.requestFeature(PhoneWindow.java:172)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at android.app.Activity.requestWindowFeature(Activity.java:2719)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at com.android.game.OptionsActivity.onCreate(OptionsActivity.java:20)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
  01-27 12:35:51.920: ERROR/AndroidRuntime(615):     ... 11 more
  </code></pre>