横固定Activityから横固定Activityへの画面遷移(finish())時に一瞬縦に回転してしまう

横固定のActivity（Play.java）をfinish()して、横固定のメインActivityに戻る際に元のActivityが一瞬縦に回転してフリーズしてしまいます。これが何ともかっこわるいのでスムースに画面遷移させたいのですがうまくいきません。

画面遷移時のアニメーションを無効（http://wada811.blogspot.com/2013/05/invalidate-activity-animation.html）にしているつもりなんですがやっぱり回転してしまいます。無効化出来ていないのでしょうか・・・

ご教授願いますm(_ _)m

Main.java


public class Play extends Activity {

	final int TIME_INTERVAL = 36000;
	final int TIME_INTERVAL_LONG = 38000;

	SharedPreferences sp;

	// setting of Timer
	final int NUM_TIMER = 13;
	Timer mTimer[] = new Timer[NUM_TIMER];

	SurfaceBoy surfaceBoy;
	SurfaceDog surfaceDog;

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.play);
		sp = getSharedPreferences("pref", MODE_PRIVATE);

		surfaceBoy = new SurfaceBoy(this);

		surfaceDog = new SurfaceDog(this, sp); 
    //同じようなSurfaceViewが11個あります以下略
	}

	@Override
	public void onResume() {
		super.onResume();

		findViewById(R.id.ib_play_home).setOnClickListener(
				new OnClickListener() {
					@Override
					public void onClick(View v) {
						for (int i = 0; i < NUM_TIMER; i++) {
							if (mTimer[i] != null)
								mTimer[i].cancel();
						}
						finish();
					}
				});

		// backgroung animation
		setAnimation();

		// setting of overlaying surfaceView
		final ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(
				ViewGroup.LayoutParams.MATCH_PARENT,
				ViewGroup.LayoutParams.MATCH_PARENT);

		for (int i = 0; i < NUM_TIMER; i++) {
			mTimer[i] = new Timer();
		}

		// switch 0:OFF 1:ON
		int dog = 0;

		int mTime = 0;
		int repeat = 1;

		if (dog == 1) {
			mTimer[0].schedule(new TimerTask() {
				@Override
				public void run() {
					runOnUiThread(new Runnable() {
						@Override
						public void run() {
							addContentView(surfaceDog, params);
							addContentView(surfaceBoy, params);
						}
					});
				}
			}, 0);
			mTime += TIME_INTERVAL;
		}

	}

	// Animation of  sun & cloud
	public void setAnimation() {
		Animation animSun = AnimationUtils.loadAnimation(Play.this,
				R.anim.anim_sun);
		Animation animCloud = AnimationUtils.loadAnimation(Play.this,
				R.anim.anim_cloud);

		findViewById(R.id.iv_back_sun).setAnimation(animSun);
		findViewById(R.id.iv_back_cloud).setAnimation(animCloud);

		animSun.start();
		animCloud.start();
	}

	@Override
	public void onPause() {
		super.onPause();
		cancelAndRemove();
		Log.v("","play onPause is running");
	}
	
	public void cancelAndRemove() {
		for (int i = 0; i < NUM_TIMER; i++) {
			if (mTimer[i] != null){
				mTimer[i].cancel();
				mTimer[i] = null;
			}
		}

		ViewGroup vg = (ViewGroup) surfaceBoy.getParent();
		if (vg != null) {
			vg.removeView(surfaceBoy);
			if (surfaceDog != null)
				vg.removeView(surfaceDog);
		}
		finish();
	}
	
}

Manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.whatsthis"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="21" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/icon_dog"
        android:label="@string/app_name" >
        <activity
            android:name=".Main"
            android:label="@string/app_name"
            android:screenOrientation="landscape"
      android:theme="@style/MyTheme" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".Play"
            android:screenOrientation="landscape"
            android:theme="@style/MyTheme" >
        </activity>
    </application>

</manifest>

styles.xml

<resources xmlns:android="http://schemas.android.com/apk/res/android">

    <!-- Application theme. -->
    <style name="MyTheme" parent="android:Theme.Light.NoTitleBar.Fullscreen">
        <item name="android:soundEffectsEnabled">false</item>
        <item name="android:windowAnimationStyle">@android:style/Animation</item>
        <item name="android:activityOpenEnterAnimation">@null</item>
        <item name="android:activityOpenExitAnimation">@null</item>
        <item name="android:activityCloseEnterAnimation">@null</item>
        <item name="android:activityCloseExitAnimation">@null</item>
    </style>

    <style name="CustomCheckBox" parent="android:Widget.CompoundButton.CheckBox">
        <item name="android:button">@drawable/cb_fragment</item>
    </style>

    <style name="CustomCheckBoxSet" parent="android:Widget.CompoundButton.CheckBox">
        <item name="android:button">@drawable/cb_set</item>
    </style>

</resources>