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NPE in android.webkit.WebView.onWindowFocusChanged

I am using android android SDK which embeds webview into the dialog. when ever I install an application on a droid with Android 2.2, a web view crash for the first time gives the next stack trace. I google, but so far no luck. Please let me know if any of you have a workaround for this problem.

ERROR/AndroidRuntime(10368): FATAL EXCEPTION: main
    06-29 10:40:59.768: ERROR/AndroidRuntime(10368): java.lang.NullPointerException
    06-29 10:40:59.768: ERROR/AndroidRuntime(10368):     at android.webkit.WebView.onWindowFocusChanged(WebView.java:4177)
    06-29 10:40:59.768: ERROR/AndroidRuntime(10368):     at android.view.View.dispatchWindowFocusChanged(View.java:3788)
    06-29 10:40:59.768: ERROR/AndroidRuntime(10368):     at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:658)
    06-29 10:40:59.768: ERROR/AndroidRuntime(10368):     at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:662)
    06-29 10:40:59.768: ERROR/AndroidRuntime(10368):     at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:662)
    06-29 10:40:59.768: ERROR/AndroidRuntime(10368):     at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:662
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Your problem is that you have not registered your application on Facebook, I also have this problem, now I created a new application and change the key, and this works fine for me.

, , , facebook packagename , ..

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