Switch View on Gingerbread <p>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:</p> <pre><code>05-04 11:00:43.261: E/AndroidRuntime(1455): FATAL EXCEPTION: main 05-04 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 Switch 05-04 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 Switch 05-04 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 more 05-04 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></pre> <p>It looks like Switch doesn't exist on Gingerbread. How can I solve the problem?</p>