横竖屏幕切换

//在AndroidManifest.xml中的activity中

 <activity
               	android:screenOrientation="landscape"
            android:configChanges="orientation|keyboardHidden"
            android:name=".MainActivity"
            android:label="@string/title_activity_main" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>