Hi All, 
   In my application am using webservices, the user is sign in the login 
page using facebook so user ll giving his/her credentails, after grant 
access page in facebook came back to main screen and then am calling the 
user request data i.e., firstname, lastname and email id. for this one i 
used async task with progress dialog showing. after completion of 
webservices downloading i am navigating to 2nd screen here 1st screen is 
going to finishing. now in 2nd screen i have logout option, when the user 
selected the logout option the facebook logout and application logout is 
calling. again i am calling first screen by startactivity method. now again 
user wants to login the app using facebook after grant access page, came 
back to first screen here calling webservice again i.e., calling async task 
with progress dialog. on preexecute method i wrote progress dialog. there 
app is crashing and showing this below log.

FATAL EXCEPTION: main
android.view.WindowManager$BadTokenException: Unable to add window -- token 
android.os.BinderProxy@4298f298 is not valid; is your activity running?
    at android.view.ViewRootImpl.setView(ViewRootImpl.java:665)
    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:328)
    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:226)
    at 
android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:151)
    at android.view.Window$LocalWindowManager.addView(Window.java:547)
    at android.app.Dialog.show(Dialog.java:277)
    at android.app.ProgressDialog.show(ProgressDialog.java:116)
    at android.app.ProgressDialog.show(ProgressDialog.java:99)
    at android.app.ProgressDialog.show(ProgressDialog.java:94)
    at 
com.satyaseshu.MainActivity$UserData.onPreExecute(MainActivity.java:209)
    at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586)
    at android.os.AsyncTask.execute(AsyncTask.java:534)
    at com.satyaseshu.MainActivity.requestUserData(MainActivity.java:191)
    at 
com.satyaseshu.MainActivity$FbAPIsAuthListener.onAuthSucceed(MainActivity.java:146)
    at com.satyaseshu.SessionEvents.onLoginSuccess(SessionEvents.java:76)
    at 
com.satyaseshu.LoginButton$LoginDialogListener.onComplete(LoginButton.java:81)
    at com.satyaseshu.Facebook$1.onComplete(Facebook.java:310)
    at 
com.satyaseshu.FbDialog$FbWebViewClient.shouldOverrideUrlLoading(FbDialog.java:131)
    at 
android.webkit.CallbackProxy.uiOverrideUrlLoading(CallbackProxy.java:274)
    at android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:376)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:153)
    at android.app.ActivityThread.main(ActivityThread.java:5000)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at 
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:821)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584)
    at dalvik.system.NativeStart.main(Native Method)

if any body knows then please let me know once. i am facing this issue. due 
to this i am unable to show any other popup dialogs and also toast message.



Thanks for all,
S.Seshu

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