选中设备后退按钮时，HTC Web视图nullPointer异常

Question

我的日志猫踪迹是

03-07 12:20:55.493: E/AndroidRuntime(30198): FATAL EXCEPTION: main
03-07 12:20:55.493: E/AndroidRuntime(30198): java.lang.NullPointerException
03-07 12:20:55.493: E/AndroidRuntime(30198):    at android.webkit.WebView$PrivateHandler.handleMessage(WebView.java:9972)
03-07 12:20:55.493: E/AndroidRuntime(30198):    at android.os.Handler.dispatchMessage(Handler.java:99)
03-07 12:20:55.493: E/AndroidRuntime(30198):    at android.os.Looper.loop(Looper.java:156)
03-07 12:20:55.493: E/AndroidRuntime(30198):    at android.app.ActivityThread.main(ActivityThread.java:4987)
03-07 12:20:55.493: E/AndroidRuntime(30198):    at java.lang.reflect.Method.invokeNative(Native Method)
03-07 12:20:55.493: E/AndroidRuntime(30198):    at java.lang.reflect.Method.invoke(Method.java:511)
03-07 12:20:55.493: E/AndroidRuntime(30198):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
03-07 12:20:55.493: E/AndroidRuntime(30198):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
03-07 12:20:55.493: E/AndroidRuntime(30198):    at dalvik.system.NativeStart.main(Native Method)