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    <p>There are two independent things going on here:<br> 1) whether your user has authenticated your app (with permissions) to Facebook and<br> 2) whether your user is logged in to Facebook. </p> <p>Authentication is required the first time your user uses your app and lasts until the user explicitly de-authenticates (e.g. through the Facebook web Account Settings -> Apps -> App Settings).</p> <p>Log in may be required each time your user starts your app. But if you use the default SDK authorize(), that tries to do a Single Sign On (SSO), where if the Facebook app is logged in, your app is automatically logged in and uses the existing access token.</p> <p>If you are using SSO, when you do a logout, that has no effect, as a real logout would have to log out the Facebook app - which the user might not like!</p> <p>You can get around this behavior by doing an authorize of the form</p> <pre><code>authorize(this, PERMISSIONS, FORCE_DIALOG_AUTH, new LoginDialogListener()); </code></pre> <p>which avoids SSO and forces a dialog login. Of course, that then forces your user to login each time you start your app - unless you save the login details / access token under the covers (which is what the SDK does - check the source).</p> <p><strong>EDITED:</strong></p> <blockquote> <pre><code> m_facebook.authorize(FacebookActivity.this, PERMISSIONS, Facebook.FORCE_DIALOG_AUTH, new LoginDialogListener()); class LoginDialogListener implements DialogListener { public void onComplete(Bundle p_values) { saveCredentials(m_facebook); if (m_messageToPost != null) { postToWall(m_messageToPost); } } public void onFacebookError(FacebookError p_error) { finish(); } public void onError(DialogError p_error) { finish(); } public void onCancel() { finish(); } } </code></pre> </blockquote>
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    1. POAndroid Facebook logout is not working
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    1. USGrIsHu
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    1. COwhat is the "FORCE_DIALOG_AUTH",all other parameters are replaced,but no idea of FORCE_DIALOG_AUTH this help me.
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    2. COMy point is that, if you are using SSO, isSessionValid does not tell you anything about the underlying login status. Why not try using the FORCE_DIALOG_AUTH form of authorize and see what happens?
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    3. COfacebook.authorize( this, new String[] { "read_stream,publish_stream,offline_access,friends_about_me,user_birthday" },-1, new DialogListener() { public void onComplete(Bundle values) { Facebook.access_token = facebook.getAccessToken(); getMyInfo(); }
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