Question

1）这个问题多次出现，而且awnser总是“你有错误的Key Hash”。

2）Facebook文档告诉我们使用此代码获取我们的Key Hash：

keytool -exportcert -alias MyKeyAlias -keystore path\to\my\Key | openssl sha1 -binary | openssl base64

3）好的，这给了我钥匙：1yl ********** Q3A

当我尝试登录时，收到以下消息： com.facebook.http.protocol.ApiException：（＃404）密钥哈希XHA ********** q10与任何存储的密钥哈希都不匹配。

4）然后我将XHA ********** q10复制并粘贴到我的应用设置上，这不是我的密钥。

5）所以，我阅读的文档是一个代码，可以为您提供正确的Key Hash。这段代码：

// Add code to print out the key hash
try {
    PackageInfo info = getPackageManager().getPackageInfo(
            "com.facebook.samples.hellofacebook", 
            PackageManager.GET_SIGNATURES);
    for (Signature signature : info.signatures) {
        MessageDigest md = MessageDigest.getInstance("SHA");
        md.update(signature.toByteArray());
        Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
        }
} catch (NameNotFoundException e) {

} catch (NoSuchAlgorithmException e) {

}

有效！给我这个哈希：+ HA ********** q0 =

6）我把最后一个哈希放在应用程序设置上，是，现在我可以连接了！但是，现在我无法打开会话!!!

我正在使用以下代码：

public class FBActivity extends Activity {

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.my_view);

        System.out.println("Start Facebook login");
        Session.openActiveSession(this, true, new Session.StatusCallback() {
            public void call(Session session, SessionState state, 
                                              Exception exception) {
                System.out.println("Call");
                if (session.isOpened()) {
                    System.out.println("Open");
                    Request.newMeRequest(session, new Request.GraphUserCallback() {
                        public void onCompleted(GraphUser user, Response response) {
                            System.out.println("Complete");
                            if (user != null) {
                                System.out.println(user.getName());

                            } else {
                                System.out.println("User NULL");
                            }
                        }
                    }).executeAsync();
                } else {
                System.out.println("Not open");
            }

        });
    }
}

日志是：

“启动Facebook登录

呼叫

未开启

呼叫

未开启“

我不知道我还能做什么，因为我已经拥有正确的Key Hash，我可以登录。

Answer 1

我明白了：

缺少以下方法。刚添加它，一切正常。

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
}

Answer 2

一次又一次拨打电话（点击相同的登录按钮）。如果是，那么facebook对话框将在第一次之后打开（在第一次点击登录bttn时它会打开fbk对话但不会在之后）原因：因为会话已创建且未被清除`即，在此会话的帮助下人员未注销，您可以获取fbk用户的个人资料信息。

如果你想这样做，那么只需编写以下代码行：

 Session session = Session.getActiveSession();
             if (session != null && session.isOpened()) {

             Toast.makeText(getApplicationContext(), "session is opened",
             Toast.LENGTH_LONG).show();

             /* clear session and again click will show facebook login */

             session = Session.getActiveSession();
             if (!session.isClosed()) {
             session.closeAndClearTokenInformation();
             }

             }

清除令牌后立即进行登录呼叫

FacebookAuthentication();


    private void FacebookAuthentication() {

        // Toast.makeText(getApplicationContext(),
        // "new session was created and requires login", Toast.LENGTH_LONG)
        // .show();

        Settings.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS);

        OpenRequest op = new Session.OpenRequest(SignUpActivity.this);

        op.setLoginBehavior(SessionLoginBehavior.SUPPRESS_SSO);
        op.setCallback(statusCallback);

        op.setPermissions(Arrays.asList("email", "public_profile"));

        Session session = new Session.Builder(getApplicationContext()).build();

        Session.setActiveSession(session);

        session.openForRead(op);

    }

全球宣布

private Session.StatusCallback statusCallback = new SessionStatusCallback();.

//不访问私人电子邮件

private class SessionStatusCallback implements Session.StatusCallback {
        @Override
        public void call(final Session session, SessionState state,
                Exception exception) {

            if (session.isOpened()) {

                makeFacebookMeRequest(session);

            }

        }
    }

public void makeFacebookMeRequest(final Session session) {

        Request.newMeRequest(session, new Request.GraphUserCallback() {

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

                if (user != null) {

                    String access_token = session.getAccessToken();

                    Log.d("Response", "Response=" + response);
                    Log.d("AccessToken", access_token);

                    UserId_FromFacebook = user.getId();
                    UserName_FromFacebook = user.getUsername();
                    FirstName_FromFacebook = user.getFirstName();
                    LastName_FromFacebook = user.getLastName();

                    try {

                        Email_FromFacebook = user.asMap().get("email")
                                .toString();

                        // Toast.makeText(getApplicationContext(),
                        // "" + Email_FromFacebook, Toast.LENGTH_LONG)
                        // .show();

                    } catch (Exception e) {

                        // e.printStackTrace();

                    }

                }

                //You can move to your activiy here and make sure user is signed up using your api

            }

        }).executeAsync();
    }

//////////////////在你的代码中应用这个补丁:)调用以下方法登录，它将解决你的问题（如果在同一个按钮上一次又一次点击你希望fbk对话框只是在下面的方法中取消注释我的代码）//////////////////////

private void LoginAndFetchFacebookProfileInfo() {

        Session currentSession = Session.getActiveSession();

        if (currentSession == null || currentSession.getState().isClosed()) {



            Session session = new Session(getApplicationContext());
            Session.setActiveSession(session);

            currentSession = session;

        }

        if (currentSession.isOpened()) {

//you are logged in so do whatever you want
            // Toast.makeText(SignUpActivity.this, "session is  opened",
            // Toast.LENGTH_LONG).show();

            makeFacebookMeRequest(currentSession);

            // Session session = Session.getActiveSession();
            // if (session != null && session.isOpened()) {
            //
            // Toast.makeText(getApplicationContext(), "session is opened",
            // Toast.LENGTH_LONG).show();
            //
            // /* clear session and again click will show facebook login */
            //
            // session = Session.getActiveSession();
            // if (!session.isClosed()) {
            // session.closeAndClearTokenInformation();
            // }
            //
            // }
            //
            // FacebookAuthentication();

        } else if (!currentSession.isOpened()) {
            // Ask for username and password
            // Toast.makeText(SignUpActivity.this, "session is not opened",
            // Toast.LENGTH_LONG).show();

            FacebookAuthentication();
        }

    }

Facebook Android SDK在登录后无法打开Session

2 个答案: