The offer I created cannot be saved, why is that?

[TenSpaces]

My code is following:

           PeerConnectionFactory factory = new PeerConnectionFactory();
       RTCConfiguration config = new RTCConfiguration();
           public void createOffer() {
               peerConnection = factory.createPeerConnection(config, new PeerConnectionObserver() {
            @Override
            public void onIceCandidate(RTCIceCandidate candidate) {
            }
        });
            peerConnection.createOffer(new RTCOfferOptions(), new CreateSessionDescriptionObserver() {
                @Override
                public void onSuccess(RTCSessionDescription description) {
                System.out.println(111);
                peerConnection.setLocalDescription(description, new SetSessionDescriptionObserver() {
                    @Override
                    public void onSuccess() {
                        System.out.println("store sccessing!");
                    }

                    @Override
                    public void onFailure(String error) {
                        System.out.println("store failuring!");             
                    }
                });
                System.out.println(222);
            }

            @Override
            public void onFailure(String error) {
                System.out.println("build failuring!");
            }
        });

When I run method createOffer, the console only printed 111, does anyone know why that is?