android bug fix

java.lang.NoSuchMethodError: android.view.View.setSystemUiVisibility
at
au.com.twosquared.airhockey.MainActivity.onCreate(MainActivity.java:17)
at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615)
at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
at android.app.ActivityThread.access$1500(ActivityThread.java:117)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3687)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
at dalvik.system.NativeStart.main(Native Method)