Switch View on Gingerbread

[Pixaro]

I've coded an app which uses Switch as a toggler.When I run it on ICS I have no problems, but when I run it on gingerbread it crashes:\[code\]05-04 11:00:43.261: E/AndroidRuntime(1455): FATAL EXCEPTION: main05-04 11:00:43.261: E/AndroidRuntime(1455): java.lang.RuntimeException: Unable to start activity ComponentInfo{it.android.smartscreenon/it.android.smartscreenon.ActivityImpostazioni}: android.view.InflateException: Binary XML file line #58: Error inflating class Switch05-04 11:00:43.261: E/AndroidRuntime(1455): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1768)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1784)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.app.ActivityThread.access$1500(ActivityThread.java:123)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:939)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.os.Handler.dispatchMessage(Handler.java:99)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.os.Looper.loop(Looper.java:130)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.app.ActivityThread.main(ActivityThread.java:3835)05-04 11:00:43.261: E/AndroidRuntime(1455): at java.lang.reflect.Method.invokeNative(Native Method)05-04 11:00:43.261: E/AndroidRuntime(1455): at java.lang.reflect.Method.invoke(Method.java:507)05-04 11:00:43.261: E/AndroidRuntime(1455): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847)05-04 11:00:43.261: E/AndroidRuntime(1455): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)05-04 11:00:43.261: E/AndroidRuntime(1455): at dalvik.system.NativeStart.main(Native Method)05-04 11:00:43.261: E/AndroidRuntime(1455): Caused by: android.view.InflateException: Binary XML file line #58: Error inflating class Switch05-04 11:00:43.261: E/AndroidRuntime(1455): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:581)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.view.LayoutInflater.rInflate(LayoutInflater.java:623)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.view.LayoutInflater.rInflate(LayoutInflater.java:626)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.view.LayoutInflater.rInflate(LayoutInflater.java:626)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.view.LayoutInflater.rInflate(LayoutInflater.java:626)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.view.LayoutInflater.inflate(LayoutInflater.java:408)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.view.LayoutInflater.inflate(LayoutInflater.java:276)05-04 11:00:43.261: E/AndroidRuntime(1455): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:212)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.app.Activity.setContentView(Activity.java:1657)05-04 11:00:43.261: E/AndroidRuntime(1455): at it.android.smartscreenon.ActivityImpostazioni.onCreate(ActivityImpostazioni.java:43)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1722)05-04 11:00:43.261: E/AndroidRuntime(1455): ... 11 more05-04 11:00:43.261: E/AndroidRuntime(1455): Caused by: java.lang.ClassNotFoundException: android.view.Switch in loader dalvik.system.PathClassLoader[/data/app/it.android.smartscreenon-1.apk]05-04 11:00:43.261: E/AndroidRuntime(1455): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)05-04 11:00:43.261: E/AndroidRuntime(1455): at java.lang.ClassLoader.loadClass(ClassLoader.java:551)05-04 11:00:43.261: E/AndroidRuntime(1455): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.view.LayoutInflater.createView(LayoutInflater.java:471)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:549)05-04 11:00:43.261: E/AndroidRuntime(1455): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66)05-04 11:00:43.261: E/AndroidRuntime(1455): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:568)05-04 11:00:43.261: E/AndroidRuntime(1455): ... 23 more\[/code\]It looks like Switch doesn't exist on Gingerbread. How can I solve the problem?