When to request permissions with Facebook's new Android SDK 3.0?

Question

With Facebook's new Android SDK 3.0 (that was released a few days ago), the process of authentication has changed.

So how do you request a read permission such as "friends_hometown"?

The following code is how I am trying to do it - but I'm quite sure it's not the way you should do this:

Version 1:

protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     Session.openActiveSession(this, true, new Session.StatusCallback() { // start Facebook login         @Override         public void call(Session session, SessionState state, Exception exception) { // callback for session state changes             if (session.isOpened()) {                 List<String> permissions = new ArrayList<String>();                 permissions.add("friends_hometown");                 session.requestNewReadPermissions(new Session.NewPermissionsRequest(FBImport.this, permissions));                 Request.executeGraphPathRequestAsync(session, "me/friends/?access_token="+session.getAccessToken()+"&fields=id,name,hometown", new Request.Callback() {                     ...                 });             }         }     }); } 

Version 2:

protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     Session currentSession = Session.getActiveSession();     if (currentSession == null || currentSession.getState().isClosed()) {         Session session = Session.openActiveSession(this, true, fbStatusCallback); // PROBLEM: NO PERMISSIONS YET BUT CALLBACK IS EXECUTED ON OPEN         currentSession = session;     }     if (currentSession != null && !currentSession.isOpened()) {         OpenRequest openRequest = new OpenRequest(this).setCallback(fbStatusCallback); // HERE IT IS OKAY TO EXECUTE THE CALLBACK BECAUSE WE'VE GOT THE PERMISSIONS         if (openRequest != null) {             openRequest.setDefaultAudience(SessionDefaultAudience.FRIENDS);             openRequest.setPermissions(Arrays.asList("friends_hometown"));             openRequest.setLoginBehavior(SessionLoginBehavior.SSO_WITH_FALLBACK);             currentSession.openForRead(openRequest);         }     } } 

What I'm doing is to request the permission as soon as the session is open - but at this point the code is already starting a Graph API request, thus the permission request comes to late ...

Can't you request a permission at the same time you initialize the session?

Answer 1

I was able to get it to work. It's a modification of your Version 2 sample. The link Jesse provided also helped a ton.

Here is the code I run through when authenticating a user:

private void signInWithFacebook() {      mSessionTracker = new SessionTracker(getBaseContext(), new StatusCallback() {          @Override         public void call(Session session, SessionState state, Exception exception) {         }     }, null, false);      String applicationId = Utility.getMetadataApplicationId(getBaseContext());     mCurrentSession = mSessionTracker.getSession();      if (mCurrentSession == null || mCurrentSession.getState().isClosed()) {         mSessionTracker.setSession(null);         Session session = new Session.Builder(getBaseContext()).setApplicationId(applicationId).build();         Session.setActiveSession(session);         mCurrentSession = session;     }      if (!mCurrentSession.isOpened()) {         Session.OpenRequest openRequest = null;         openRequest = new Session.OpenRequest(SignUpChoices.this);          if (openRequest != null) {             openRequest.setDefaultAudience(SessionDefaultAudience.FRIENDS);             openRequest.setPermissions(Arrays.asList("user_birthday", "email", "user_location"));             openRequest.setLoginBehavior(SessionLoginBehavior.SSO_WITH_FALLBACK);              mCurrentSession.openForRead(openRequest);         }     }else {         Request.executeMeRequestAsync(mCurrentSession, new Request.GraphUserCallback() {               @Override               public void onCompleted(GraphUser user, Response response) {                   Log.w("myConsultant", user.getId() + " " + user.getName() + " " + user.getInnerJSONObject());               }             });     } } 

For testing I ran it through the below code after returning from Facebooks authentication:

public void onActivityResult(int requestCode, int resultCode, Intent data) {   super.onActivityResult(requestCode, resultCode, data);   Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);    if (mCurrentSession.isOpened()) {     Request.executeMeRequestAsync(mCurrentSession, new Request.GraphUserCallback() {            // callback after Graph API response with user object           @Override           public void onCompleted(GraphUser user, Response response) {               Log.w("myConsultant", user.getId() + " " + user.getName() + " " + user.getInnerJSONObject());           }         });     } } 

Answer 2

I solved the same problem by implementing my own Session.openActiveSession() method:

private static Session openActiveSession(Activity activity, boolean allowLoginUI, StatusCallback callback, List<String> permissions) {     OpenRequest openRequest = new OpenRequest(activity).setPermissions(permissions).setCallback(callback);     Session session = new Builder(activity).build();     if (SessionState.CREATED_TOKEN_LOADED.equals(session.getState()) || allowLoginUI) {         Session.setActiveSession(session);         session.openForRead(openRequest);         return session;     }     return null; }