Facebook SDK for Android 3.0: UnsupportedOperationException

Question

 01-29 21:06:00.601: ERROR/AndroidRuntime(582): FATAL EXCEPTION: main
     java.lang.IllegalStateException: Could not execute method of the activity
     at android.view.View$1.onClick(View.java:2144)
     at android.view.View.performClick(View.java:2485)
     at android.view.View$PerformClick.run(View.java:9080)
     at android.os.Handler.handleCallback(Handler.java:587)
     at android.os.Handler.dispatchMessage(Handler.java:92)
     at android.os.Looper.loop(Looper.java:130)
     at android.app.ActivityThread.main(ActivityThread.java:3687)
     at java.lang.reflect.Method.invokeNative(Native Method)
     at java.lang.reflect.Method.invoke(Method.java:507)
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
     at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.reflect.InvocationTargetException
     at java.lang.reflect.Method.invokeNative(Native Method)
     at java.lang.reflect.Method.invoke(Method.java:507)
     at android.view.View$1.onClick(View.java:2139)
     ... 11 more
     Caused by: java.lang.UnsupportedOperationException: Session: an attempt was made to request new permissions for a session that is not currently open.
     at com.facebook.Session.requestNewPermissions(Session.java:977)
     at com.facebook.Session.requestNewPublishPermissions(Session.java:501)
     at ***.MainActivity.postToFacebook(MainActivity.java:105)
     ... 14 more

The exception is thrown in line

 session.requestNewPublishPermissions(newPermissionsRequest);
 // Check for publish permissions
            List<String> permissions = session.getPermissions();
            if (!isSubsetOf(PERMISSIONS, permissions)) {
                pendingPublishReauthorization = true;
                Session.NewPermissionsRequest newPermissionsRequest = new Session
                        .NewPermissionsRequest(this, PERMISSIONS);


                session.requestNewPublishPermissions(newPermissionsRequest);


                Toast.makeText(getActivity().getApplicationContext(),
                        "Not enough permissions",
                        Toast.LENGTH_SHORT).show();
                return;
            }

What does this exception mean and how to fix it?

Answer 1

Dmytro, as per my comment, I've put together a couple of articles which fully explain opening a Facebook session and requesting additional permissions: here and here . Hope you and others find it beneficial and save time getting started with the SDK! :)

Edit: The reason you are getting this exception is because you can't request new permissions on a non-open session. You need to open your session before requesting new permissions or making other Facebook API requests. I've put together a guide in the articles linked to above which ensure a Facebook API request (such as posting to a user's feed and so forth) is not made until the the user's session is open and the user has the required permissions.

Answer 2

It means that the session you are requesting permissions for is inactive/expired. You need to re-establish the session before you can request permissions.

Answer 3

您是否在调用requestNewPublishPermissions之前调用了session.openForPublish（Session.OpenRequest openRequest）？