Facebook Sdk Has Not Been Initialized FacebookSdk.sdkInitialize()

Question

Hey I know this was asked before, but none of the solutions seem to help. I\'m using first time Facebook SDK in my application.

What I\'ve tried:

I had tried

Answer 1

Use Initialise Callback Constructor like this:

    Handler mHandler = new Handler();
            FacebookSdk.InitializeCallback initializeCallback = new FacebookSdk.InitializeCallback() {
                @Override
                public void onInitialized() {

                    mHandler.post(new Runnable() {
                        @Override
                        public void run() {
                            //UI Code Here
                        }
                    });
                }
            };
    //before setContentView()   
 FacebookSdk.sdkInitialize(getActivity().getApplicationContext(),initializeCallback);