使用本机 facebook 应用程序登录和 webview 弹出窗口之间的区别

Question

我有以下代码，用于允许用户使用 facebook 登录。目前，如果用户没有安装本机 android facebook 应用程序，所以我使用的 webview 弹出登录一切正常，用户已登录，processSessionStatus() 被触发。

这会将用户电子邮件传递到我的应用自己的登录信息。

问题是当用户安装了本机应用并将其用于 facebook 登录时，processSessionStatus() 不会触发。

我已经设置了我的 facebook 开发设置以包含 FbLoginActivity 作为本机登录使用的活动。我想一旦用户使用本机应用程序登录，我需要向onActivityResult 添加一些内容以触发processSessionStatus()？

但是我不确定我需要传递什么才能使其正确触发。

我的 FbLoginActivity：

public class FbLoginActivity extends Activity {

    private static List<String> permissions;
    Session.StatusCallback statusCallback = new SessionStatusCallback();
    ProgressDialog dialog;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fblogin);
        Button fbButton = (Button) findViewById(R.id.fbshare);
        /***** FB Permissions *****/
        permissions = new ArrayList<String>();
        permissions.add("email");
        /***** End FB Permissions *****/
        fbButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Check if there is any Active Session, otherwise Open New
                // Session
                Session session = Session.getActiveSession();
                if (session == null) {
                    Session.openActiveSession(FbLoginActivity.this, true,
                            statusCallback);
                } else if (!session.isOpened()) {
                    session.openForRead(new Session.OpenRequest(
                            FbLoginActivity.this).setCallback(statusCallback)
                            .setPermissions(permissions));
                }
            }
        });
        Session session = Session.getActiveSession();
        if (session == null) {
            if (savedInstanceState != null) {
                session = Session.restoreSession(this, null, statusCallback,
                        savedInstanceState);
            }
            if (session == null) {
                session = new Session(this);
            }
            Session.setActiveSession(session);
            session.addCallback(statusCallback);
            if (session.getState().equals(SessionState.CREATED_TOKEN_LOADED)) {
                session.openForRead(new Session.OpenRequest(this).setCallback(
                        statusCallback).setPermissions(permissions));
            }
        }
    }

    private class SessionStatusCallback implements Session.StatusCallback {

        @Override
        public void call(Session session, SessionState state,
                Exception exception) {
            // Check if Session is Opened or not
            processSessionStatus(session, state, exception);
        }
    }

    @SuppressWarnings("deprecation")
    public void processSessionStatus(Session session, SessionState state,
            Exception exception) {
        if (session != null && session.isOpened()) {
            if (session.getPermissions().contains("email")) {
                // Show Progress Dialog
                dialog = new ProgressDialog(FbLoginActivity.this);
                dialog.setMessage("Logging in..");
                dialog.show();
                Request.executeMeRequestAsync(session,
                        new Request.GraphUserCallback() {

                            @Override
                            public void onCompleted(GraphUser user,
                                    Response response) {

                                if (dialog != null && dialog.isShowing()) {
                                    dialog.dismiss();
                                }
                                if (user != null) {
                                    Map<String, Object> responseMap = new HashMap<String, Object>();
                                    GraphObject graphObject = response
                                            .getGraphObject();
                                    responseMap = graphObject.asMap();
                                    Log.i("FbLogin", "Response Map KeySet - "
                                            + responseMap.keySet());
                                    // TODO : Get Email
                                    // responseMap.get("email");
                                    String fb_id = user.getId();
                                    String email = null;
                                    String name = (String) responseMap
                                            .get("name");
                                    if (responseMap.get("email") != null) {
                                        email = responseMap.get("email")
                                                .toString();
                                        Intent i = new Intent(FbLoginActivity.this, FbLogin2Activity.class);
                                        i.putExtra("Email", email);
                                        startActivity(i);
                                    } else {
                                        // Clear all session info & ask user to
                                        // login again
                                        Session session = Session
                                                .getActiveSession();
                                        if (session != null) {
                                            session.closeAndClearTokenInformation();
                                        }
                                    }
                                }
                            }
                        });
            } else {
                session.requestNewReadPermissions(new Session.NewPermissionsRequest(
                        FbLoginActivity.this, permissions));
            }
        }
    }

    /********** Activity Methods **********/
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        Log.d("FbLogin", "Result Code is - " + resultCode + "");
        Session.getActiveSession().onActivityResult(FbLoginActivity.this,
                requestCode, resultCode, data);
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        // TODO Save current session
        super.onSaveInstanceState(outState);
        Session session = Session.getActiveSession();
        Session.saveSession(session, outState);
    }

    @Override
    protected void onStart() {
        // TODO Add status callback
        super.onStart();
        Session.getActiveSession().addCallback(statusCallback);
    }

    @Override
    protected void onStop() {
        // TODO Remove callback
        super.onStop();
        Session.getActiveSession().removeCallback(statusCallback);
    }
} 

Answer 1

我遇到了类似的问题。事实证明，Facebook 确实希望您在使用 SSO 时将您的请求“分批”分开。来自 Facebook 文档（如以下链接所示），

您应该计划您的应用在安装时请求最低读取权限。

this 是我在调查时发现的。