在尝试显示Facebook对话框时获取'BadTokenException:无法添加窗口' - Android

当我试图从Facebook SDK显示墙上发布对话框时,我得到了一个Bad Token Exception(它每2次运行应用程序就会发生).

我有一个"发布"按钮,如果用户登录到他的FB帐户,则显示对话框,或者显示登录对话框(如果用户不是,则显示"在墙上发布"对话框)登录到他的帐户.

这是发布按钮的点击监听器 -

    mPostButton.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            if(mLoginButton.getVisibility() == 0)
                postOnWall();
            else
                mLoginButton.performClick();
        }
    });  

这是onAuthSucceed()监听器 -

public void onAuthSucceed() {
    postOnWall();
}

这是PostOnWall函数(显示发布对话框) -

 public void postOnWall()
 {
    Bundle params = new Bundle();
    params.putString("name", FBname);
    params.putString("link", FBlink);
    params.putString("description", FBdescription);
    params.putString("picture", FBpicture);
    con = this;
    mFacebook.dialog(con, "feed", params, new SampleDialogListener());
 }

这是错误的日志 -

 05-05 16:25:09.601: WARN/WindowManager(109): Attempted to add application window with unknown token HistoryRecord{405416b0 android.alco/.do_drive}.  Aborting.
 05-05 16:25:27.292: ERROR/AndroidRuntime(20089): android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@405db9f8 is not valid; is your activity running?
 05-05 16:25:27.292: ERROR/AndroidRuntime(20089):     at android.view.ViewRoot.setView(ViewRoot.java:527)
 05-05 16:25:27.292: ERROR/AndroidRuntime(20089):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177)
 05-05 16:25:27.292: ERROR/AndroidRuntime(20089):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
 05-05 16:25:27.292: ERROR/AndroidRuntime(20089):     at android.view.Window$LocalWindowManager.addView(Window.java:424)
 05-05 16:25:27.292: ERROR/AndroidRuntime(20089):     at android.app.Dialog.show(Dialog.java:241)
 05-05 16:25:27.292: ERROR/AndroidRuntime(20089):     at com.facebook.android.Facebook.dialog(Facebook.java:622)
 05-05 16:25:27.292: ERROR/AndroidRuntime(20089):     at android.alco.do_drive.postOnWall(do_drive.java:258)
 05-05 16:25:27.292: ERROR/AndroidRuntime(20089):     at android.alco.do_drive$SampleAuthListener.onAuthSucceed(do_drive.java:172)
 05-05 16:25:27.292: ERROR/AndroidRuntime(20089):     at android.alco.SessionEvents.onLoginSuccess(SessionEvents.java:78)
 05-05 16:25:27.292: ERROR/AndroidRuntime(20089):     at android.alco.LoginButton$LoginDialogListener.onComplete(LoginButton.java:100)
 05-05 16:25:27.292: ERROR/AndroidRuntime(20089):     at com.facebook.android.Facebook$1.onComplete(Facebook.java:308)
 05-05 16:25:27.292: ERROR/AndroidRuntime(20089):     at com.facebook.android.FbDialog$FbWebViewClient.shouldOverrideUrlLoading(FbDialog.java:133)

我看了一遍,我找不到解决方案.

编辑 - 仅当用户未登录时才会发生这种情况.在这种情况下,他按下"发布"按钮,登录,然后调用"postOnWall"函数,这会生成错误.我现在正在研究它2天,但却找不到任何相关信息.

谢谢!

@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
    Log.d("Facebook-WebView", "Webview loading URL: " + url);
    super.onPageStarted(view, url, favicon);
    if(FbDialog.this.isShowing())
        mSpinner.show();
}