通过Android应用程序进行Facebook身份验证

Question

我是Android新手。 我正在开发一个需要Facebook登录才能继续的应用程序。 因此，为此，我遵循了本教程-https: //developers.facebook.com/docs/android/getting-started

编辑：使用UILifecycleHelper，一旦用户对应用程序应用程序进行身份验证关闭，也会发生相同的事情。

private Session.StatusCallback callback = new Session.StatusCallback() {
        @Override
        public void call(Session session, SessionState state, Exception exception) {
            if (session.isOpened()) {
                Log.w("Vinit", "Session started");
              // make request to the /me API
              Request.newMeRequest(session, new Request.GraphUserCallback() {

                // callback after Graph API response with user object
                @Override
                public void onCompleted(GraphUser user, Response response) {
                  if (user != null) {
                    TextView t = (TextView) findViewById(R.id.textView1);
                    t.setText("User: " + user.getFirstName());

                  }
                }
              }).executeAsync();
            }
        }
    };

    private FacebookDialog.Callback dialogCallback = new FacebookDialog.Callback() {
        @Override
        public void onError(FacebookDialog.PendingCall pendingCall, Exception error, Bundle data) {
            Log.d("HelloFacebook", String.format("Error: %s", error.toString()));
        }

        @Override
        public void onComplete(FacebookDialog.PendingCall pendingCall, Bundle data) {
            Log.d("HelloFacebook", "Success!");
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);            
        if(new LoginChecker(this).isRegistered()){
            Intent intent = new Intent(this, MainActivity.class);
            startActivity(intent);
        }else{
            setContentView(R.layout.activity_login);            
            LoginButton loginButton = (LoginButton) findViewById(R.id.loginButton1);
            thisActivity = this;
            loginButton.setOnClickListener(new OnClickListener() {                              
                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub                  
                    uiHelper = new UiLifecycleHelper(thisActivity, callback);
                }
            });

        }
    }
    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
          super.onActivityResult(requestCode, resultCode, data);
          Log.w("Vinit", "On Activity Result function");
          uiHelper.onActivityResult(requestCode, resultCode, data, dialogCallback);
    }

Answer 1

1. 使用UiLifecycleHelper https://developers.facebook.com/docs/reference/android/current/class/UiLifecycleHelper来确保您的活动/片段以正确的方式处理来自facebook组件的处理。
2. 检查Facebook Session对象。 应用程序是否在session.IsOpened（）内调用指令？ 尝试调试代码以查看Facebook会话的状态。