我正在编写一个与 Facebook SDK 集成的应用程序，以分享一些(字符串)内容作为墙帖。现在，我让 HelloFacebookSample 工作了。但是它使用他们的 LoginButton 来登录用户。

我不想那样。我要做的就是单击操作栏中的共享按钮并将其共享到 Facebook。因此我想以编程方式登录，我试图模拟 LoginButton 的作用，但到目前为止没有成功。我明白了

12-06 15:34:33.180: E/AndroidRuntime(19493): java.lang.UnsupportedOperationException: Session: an attempt was made to reauthorize a session that has a pending request.

公共(public)类 MainActivity 扩展 FacebookActivity {

@SuppressWarnings("serial")
private static final List<String> PERMISSIONS = new ArrayList<String>() {
    {
        add("publish_actions");
    }
};
private final int REAUTHORIZE_ACTIVITY = 3;
private Button postStatusUpdateButton;
private PendingAction pendingAction = PendingAction.NONE;

private enum PendingAction {
    NONE, POST_PHOTO, POST_STATUS_UPDATE
}

/**
 * Called when the activity is first created.
 */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    postStatusUpdateButton = (Button) findViewById(R.id.postStatusUpdateButton);
    postStatusUpdateButton.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {
            Log.d("MainActivity", "onClick");
            onClickPostStatusUpdate();
        }

    });

}

@Override
protected void onSessionStateChange(SessionState state, Exception exception) {
    super.onSessionStateChange(state, exception);
}

private interface GraphObjectWithId extends GraphObject {
    String getId();
}

private void showPublishResult(String message, GraphObject result, FacebookRequestError error) {
    String title = null;
    String alertMessage = null;
    if (error == null) {
        title = getString(R.string.success);
        String id = result.cast(GraphObjectWithId.class).getId();
        alertMessage = getString(R.string.successfully_posted_post, message, id);
    } else {
        title = getString(R.string.error);
        alertMessage = error.getErrorMessage();
    }

    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle(title).setMessage(alertMessage).setPositiveButton(getString(R.string.ok), null);
    builder.show();
}

private void onClickPostStatusUpdate() {
    Log.d("MainActivity", "onClickPostStatusUpdate");
    performPublish(PendingAction.POST_STATUS_UPDATE);
}

private boolean hasPublishPermission() {
    Session session = Session.getActiveSession();
    return session != null && session.getPermissions().contains("publish_actions");
}

private void performPublish(PendingAction action) {
    Log.d("MainActivity", "peformPublish");

    Session session = Session.getActiveSession();

    if (session == null) {
        session = new Session.Builder(this).setApplicationId("xxx").build();
        Session.setActiveSession(session);
    }

    if (!session.isOpened()) {
        Session.OpenRequest openRequest = new Session.OpenRequest(this);
        openRequest.setPermissions(PERMISSIONS);
        openRequest.setLoginBehavior(SessionLoginBehavior.SSO_WITH_FALLBACK);
        session.openForPublish(openRequest);
    }

    if (session != null) {
        // postStatusUpdate();
        pendingAction = action;
        if (hasPublishPermission()) {
            // We can do the action right away.
            handlePendingAction();
            // postStatusUpdate();
        } else {
            // We need to reauthorize, then complete the action when we get
            // called back.
            Session.ReauthorizeRequest reauthRequest = new Session.ReauthorizeRequest(this, PERMISSIONS)
                    .setRequestCode(REAUTHORIZE_ACTIVITY).setLoginBehavior(SessionLoginBehavior.SSO_WITH_FALLBACK);
            session.reauthorizeForPublish(reauthRequest);
        }
    }
}

@SuppressWarnings("incomplete-switch")
private void handlePendingAction() {
    PendingAction previouslyPendingAction = pendingAction;
    // These actions may re-set pendingAction if they are still pending, but
    // we assume they
    // will succeed.
    pendingAction = PendingAction.NONE;

    switch (previouslyPendingAction) {
    case POST_STATUS_UPDATE:
        postStatusUpdate();
        break;
    }
}

private void postStatusUpdate() {
    // if (user != null && hasPublishPermission()) {
    if (hasPublishPermission()) {
        // final String message = getString(R.string.status_update,
        // user.getFirstName(), (new Date().toString()));
        final String message = "kks uz nemam nervy";
        Request request = Request.newStatusUpdateRequest(Session.getActiveSession(), message,
                new Request.Callback() {
                    @Override
                    public void onCompleted(Response response) {
                        showPublishResult(message, response.getGraphObject(), response.getError());
                    }
                });
        Request.executeBatchAsync(request);
    } else {
        pendingAction = PendingAction.POST_STATUS_UPDATE;
    }
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    Log.d("MainActivity", "onActivityResult");
    Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
}

}

嗯，这仍然是我试图以正确方式弯曲的 HelloFacebookSample 项目。我唯一玩过的是 performPublish 方法，用于创建 session 。

希望有更简单的方法! P.S.:我正在使用 Facebook SDK 3

最佳答案

您发布的内容是您的整个 Activity 吗？

您还需要覆盖 onActivityResult，并将值传递给 Session.getActiveSession().onActivityResult(...)。否则，Session 将不知道用户已授权您的应用，这就是您看到错误的原因(Session 认为仍有待处理的身份验证请求，这就是您无法重新授权发布的原因)。

关于Android - Facebook SDK 3 - 如何在没有 LoginButton 的情况下以编程方式登录，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13746124/