Android纵向和横向模式

Question

我正在开发一个Android应用程序，我想只为大屏幕和超大屏幕启用横向模式。因为我在 oncreate（）方法中编写以下代码

 int screenSize = getResources().getConfiguration().screenLayout &
                    Configuration.SCREENLAYOUT_SIZE_MASK;

            switch(screenSize) {
                case Configuration.SCREENLAYOUT_SIZE_LARGE:
                    Toast.makeText(this, "Large screen",Toast.LENGTH_LONG).show();
                    break;
                case Configuration.SCREENLAYOUT_SIZE_NORMAL:
                    Toast.makeText(this, "Normal screen",Toast.LENGTH_LONG).show();
                    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

                    break;
                case Configuration.SCREENLAYOUT_SIZE_SMALL:
                    Toast.makeText(this, "Small screen",Toast.LENGTH_LONG).show();
                    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
                    break;
                case Configuration.SCREENLAYOUT_SIZE_XLARGE:
                    Toast.makeText(this, "Small screen",Toast.LENGTH_LONG).show();

                    break;    

                default:
                    Toast.makeText(this, "Screen size is neither large, normal or small" , Toast.LENGTH_LONG).show();
                    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

            }

在我的oncreate（）方法中编写此代码后，每次单击事件的响应变得非常慢。

我将布局文件作为参考

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="match_parent" 
    android:layout_weight="1"
    android:background="@drawable/blue_bg"

    >

    <!-- Menu Panel -->
    <RelativeLayout
           android:id="@+id/menuPanel"
           android:layout_height="match_parent"
           android:layout_width="wrap_content"
           android:gravity="right"
           android:background="@drawable/gray_bg"
           android:orientation="vertical" >

            <TextView
                android:id="@+id/menu_title_1"
                android:layout_width="fill_parent"
                android:layout_height="50dp"
                android:layout_alignParentTop="true"
                android:layout_marginLeft="0dp" 
                android:paddingLeft="15dp"             
                android:gravity="center_vertical"
                android:background="#353535"
                android:textColor="@android:color/white"
                android:text="@string/menu_title">     
            </TextView>

            <View
                android:id="@+id/menu_item_divider_1"
                android:layout_width="fill_parent"
                android:layout_height="0.5dp"
                android:layout_marginLeft="0dp"
                android:layout_marginRight="0dp"
                android:layout_below="@+id/menu_title_1"
                android:background="#b5b5b5"/>

             <ListView 
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/menu_item_divider_1"
                android:dividerHeight="1dp"
               android:id="@+id/list"
                ></ListView>
            </RelativeLayout>

       <!-- Sliding Panel -->     
        <LinearLayout
                android:id="@+id/slidingPanel"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:gravity="left"
                android:orientation="vertical"
                android:background="@android:color/white" >

                <RelativeLayout
                    android:id="@+id/header"
                    android:layout_width="match_parent"
                    android:layout_height="50dp"
                    android:background="@drawable/blue_bg" >

                    <View
                        android:id="@+id/header_vertical_divider_1"
                        android:layout_width="2dp"
                        android:layout_height="fill_parent"
                        android:layout_alignParentTop="true"
                        android:layout_marginLeft="15dp"
                        android:layout_toRightOf="@+id/menuViewButton"
                        android:background="@drawable/engraved_bg" />

                        **<ImageView
                            android:id="@+id/menuViewButton"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_alignParentLeft="true"
                            android:layout_centerVertical="true"
                            android:layout_marginLeft="15dp"
                            android:clickable="true"
                            android:contentDescription="@string/description"
                            android:src="@drawable/icon_menu"
                            android:visibility="visible" 
                                    android:OnClick="slidewindow"/>**</RelativeLayout>

                <View
                     android:id="@+id/dividerHeaderBottom"
                     android:layout_width="fill_parent"
                     android:layout_height="1dp"
                     android:background="#414141" />



                <RelativeLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_marginTop="20dp"
                    android:layout_marginLeft="30dp"
                    android:layout_marginRight ="30dp"
                    android:id="@+id/fragment"
                    android:background="@drawable/rounded_edittext"
                    android:layout_marginBottom="30dp"
                   >

                    <ImageView
                        android:id="@+id/imageView1"
                        android:layout_width="fill_parent"
                        android:layout_height="30dp"
                        android:layout_alignParentLeft="true"
                        android:layout_alignParentTop="true"

                        android:src="@drawable/blue_bg" />
                    </RelativeLayout>

        </LinearLayout>
</FrameLayout>

menuview 按钮ID点击事件仅在我在该点击事件中编写 Configuration.SCREENLAYOUT_SIZE_SMALL 代码时才有效。您可以解释为什么检查后响应变得非常慢oncreate（）方法中的屏幕大小。如果不正确，请告诉我替代方案。