02-16 09:52:51.487: E/AndroidRuntime(10212): FATAL EXCEPTION: main
02-16 09:52:51.487: E/AndroidRuntime(10212): java.lang.IllegalArgumentException: Bad stream type 15
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at android.os.Parcel.readException(Parcel.java:1331)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at android.os.Parcel.readException(Parcel.java:1281)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at android.media.IAudioService$Stub$Proxy.setStreamVolume(IAudioService.java:540)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at android.media.AudioManager.setStreamVolume(AudioManager.java:649)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at com.android.jieehd.muteit.MainActivity.unmute(MainActivity.java:213)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at com.android.jieehd.muteit.MainActivity$6.onPreferenceClick(MainActivity.java:95)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at android.preference.Preference.performClick(Preference.java:941)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at android.preference.PreferenceScreen.onItemClick(PreferenceScreen.java:202)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at android.widget.AdapterView.performItemClick(AdapterView.java:292)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at android.widget.AbsListView.performItemClick(AbsListView.java:1081)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at android.widget.AbsListView$PerformClick.run(AbsListView.java:2537)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at android.widget.AbsListView$1.run(AbsListView.java:3191)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at android.os.Handler.handleCallback(Handler.java:605)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at android.os.Handler.dispatchMessage(Handler.java:92)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at android.os.Looper.loop(Looper.java:137)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at android.app.ActivityThread.main(ActivityThread.java:4424)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at java.lang.reflect.Method.invokeNative(Native Method)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at java.lang.reflect.Method.invoke(Method.java:511)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
02-16 09:52:51.487: E/AndroidRuntime(10212): 	at dalvik.system.NativeStart.main(Native Method)