In my application on the start page I ask the user to authenticate via Facebook, then I request for some permissions and fetch some information:
LoginButton authButton = (LoginButton) view.findViewById(R.id.authButton);
authButton.setFragment(this);
authButton.setReadPermissions(Arrays.asList("user_likes", "user_status"));
fb = new FacebookMain();
I am able to get all this information, but moving to my next page I want to give a button on my listview and from there a user can post on a friends wall. I followed the HelloFacebook sample and it works like a charm, however in my case when I try to implement it in a fragment it does not work as intended, I dont want the user to login every time he wants to post (I am using an additional permission here -- to post) DO I have to implement all the lifecycly events here, in this fragment? Is there any other or recommended approach to this?
Currently what I am doing is:
my class declaration:
public class FragmentTab1 extends Fragment {
Class level variables:
String FACEBOOK_ID;
String IMAGE_CONTENT;
EditText SEARCH;
private static final String PERMISSION = "publish_actions";
Session session;
private final String PENDING_ACTION_BUNDLE_KEY = "com.exa.digitalrem:PendingAction";
private PendingAction pendingAction = PendingAction.NONE;
private GraphUser user1;
private UiLifecycleHelper uiHelper;
Functions related to facebook:
private PendingAction pendingAction = PendingAction.NONE;
private GraphUser user1;
private enum PendingAction {
NONE, POST_PHOTO, POST_STATUS_UPDATE
}
private Session.StatusCallback callback = new Session.StatusCallback() {
@Override
public void call(Session session, SessionState state,
Exception exception) {
onSessionStateChange(session, state, exception);
}
};
public static boolean isActive() {
Session session = Session.getActiveSession();
if (session == null) {
return false;
}
return session.isOpened();
}
private void onSessionStateChange(Session session, SessionState state,
Exception exception) {
if (pendingAction != PendingAction.NONE && (exception instanceof FacebookOperationCanceledException || exception instanceof FacebookAuthorizationException)) {
new AlertDialog.Builder(getActivity()) .setTitle("cancelled").setMessage("NotGranted").setPositiveButton("Ok", null).show();
pendingAction = PendingAction.NONE;
} else if (state == SessionState.OPENED_TOKEN_UPDATED) {
handlePendingAction();
}
updateUI();
}
private void updateUI() {
Session session = Session.getActiveSession();
boolean enableButtons = (session != null && session.isOpened());
if (enableButtons && user1 != null) {
// profilePictureView.setProfileId(user.getId());
// greeting.setText(getString(R.string.app_name, user.getFirstName()));
} else {
// profilePictureView.setProfileId(null);
// greeting.setText(null);
}
}
@SuppressWarnings("incomplete-switch")
private void handlePendingAction() {
PendingAction previouslyPendingAction = pendingAction;
// These actions may re-set pendingAction if they are still pending, but
// we assume they
// will succeed.
pendingAction = PendingAction.NONE;
}
In the onCreate:
uiHelper = new UiLifecycleHelper(getActivity(), callback);
uiHelper.onCreate(savedInstanceState);
if (savedInstanceState != null) {
name = savedInstanceState.getString(PENDING_ACTION_BUNDLE_KEY);
pendingAction = PendingAction.valueOf(name);
}
//===============================================
Session.openActiveSessionFromCache(getActivity());
//================================================
This is my facebook post method, I call this on a button click, which is in a listview:
public void postFB(String id) {
System.out.println("in fb");
if (isNetworkConnected()) {
Session session = Session.getActiveSession();
if (session != null) {
System.out.println("session not null");
if (hasPublishPermission()) {
//do something
WebDialog feedDialog = (new WebDialog.FeedDialogBuilder(
getActivity(), Session.openActiveSessionFromCache(getActivity()),
params)).setOnCompleteListener(
new OnCompleteListener() {
@Override
public void onComplete(Bundle values,
FacebookException error) {
// frag3.setFbId(null);
// ---------------------------- got to put
// check here
// onBackPressed();
}
}).build();
feedDialog.show();
} else if (session.isOpened()) {
// We need to get new permissions, then complete the action
// when we get called back.
session.requestNewPublishPermissions(new Session.NewPermissionsRequest(
getActivity(), PERMISSION));
// do something
WebDialog feedDialog = (new WebDialog.FeedDialogBuilder(
getActivity(), Session.getActiveSession(),
params)).setOnCompleteListener(
new OnCompleteListener() {
@Override
public void onComplete(Bundle values,
FacebookException error) {
// frag3.setFbId(null);
// ---------------------------- got to put
// check here
//onBackPressed();
}
}).build();
feedDialog.show();
}
}else if(session == null){
System.out.println("login");
}
} else {
Toast.makeText(getActivity(),
"Please check your internet connection", Toast.LENGTH_LONG)
.show();
}
}
This however does not seem to me a correct approach, is there any better way? Also how do I detect if the user session is expired and prompt the user to login again? The Docs dont seem to reveal the internal functioning of the Login button?
