Error: Class not found when unmarshalling: com.facebook.login.Login Client Request

Question

I am getting this error when hitting the \"Login With Facebook\" (Simple login button).

I have Google, and read other topics here - but I can not see any thing mat

Answer 1

Actually this is happend. Because of the onActivityResult method has not implemented in side your Activity and also you must call

callbackManager.onActivityResult(requestCode, resultCode, data);

method inside this method. I am sure 100% your problem resolved.

Answer 2

In my case i forgot to add application package name and class name on the developer page of facebook. After i added this information then it worked.

Answer 3

You should add this to your acctivity

    @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)            {
    super.onActivityResult(requestCode, resultCode, data);
    callbackManager.onActivityResult(requestCode, resultCode, data);

}

but if your using parse SDK add this

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    ParseFacebookUtils.onActivityResult(requestCode, resultCode, data);
}

Answer 4

I too had this issue. Mine however was a login call made within the FBActivity.OnResume method for callbacks to login after accepting fb perms.

I simply moved the request into the profile tracker in the onCreate method

    ProfileTracker profileTracker = new ProfileTracker() {
        @Override
        protected void onCurrentProfileChanged(Profile oldProfile, Profile currentProfile) {

            Profile.fetchProfileForCurrentAccessToken();
            if(currentProfile != null) {
                String fbUserId = currentProfile.getId();
                profileUrl = currentProfile.getProfilePictureUri(200, 200).toString();
                Log.d("FB profile", "got new/updated profile from thread " + fbUserId);

                // jump if logged in already
                GetFacebookProfileAndJump(currentProfile);

            }

        }
    };

Also ensure your OnCreate super is as follows

    FacebookSdk.sdkInitialize(getApplicationContext());
    mCallbackmanager = CallbackManager.Factory.create();
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_fbauth_);

...

Answer 5

Check your android:noHistory flag on the activity.

See link https://developers.facebook.com/bugs/1621984714705591/ look for post by Andreas Bergenwall

Answer 6

I had the same problem, and solved by putting the facebook_app_id to strings.xml instead of a constant:

<meta-data
        android:name="com.facebook.sdk.ApplicationId"
        android:value="@string/facebook_app_id" />