随着Facebook新的Android SDK 3.0(几天前发布),身份验证过程发生了变化。
那么,你如何请求诸如"friends_hometown"之类的读取权限呢?
以下代码是我尝试的方法,但我很确定这不是你应该做的:
版本1:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Session.openActiveSession(this, true, new Session.StatusCallback() { // start Facebook login
@Override
public void call(Session session, SessionState state, Exception exception) { // callback for session state changes
if (session.isOpened()) {
List<String> permissions = new ArrayList<String>();
permissions.add("friends_hometown");
session.requestNewReadPermissions(new Session.NewPermissionsRequest(FBImport.this, permissions));
Request.executeGraphPathRequestAsync(session, "me/friends/?access_token="+session.getAccessToken()+"&fields=id,name,hometown", new Request.Callback() {
...
});
}
}
});
}
版本2:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Session currentSession = Session.getActiveSession();
if (currentSession == null || currentSession.getState().isClosed()) {
Session session = Session.openActiveSession(this, true, fbStatusCallback); // PROBLEM: NO PERMISSIONS YET BUT CALLBACK IS EXECUTED ON OPEN
currentSession = session;
}
if (currentSession != null && !currentSession.isOpened()) {
OpenRequest openRequest = new OpenRequest(this).setCallback(fbStatusCallback); // HERE IT IS OKAY TO EXECUTE THE CALLBACK BECAUSE WE'VE GOT THE PERMISSIONS
if (openRequest != null) {
openRequest.setDefaultAudience(SessionDefaultAudience.FRIENDS);
openRequest.setPermissions(Arrays.asList("friends_hometown"));
openRequest.setLoginBehavior(SessionLoginBehavior.SSO_WITH_FALLBACK);
currentSession.openForRead(openRequest);
}
}
}
我所做的是在会话打开后立即请求权限,但此时代码已经启动了Graph API请求,因此权限请求来得很晚。。。
不能在初始化会话的同时请求权限吗?
我能够让它工作。这是对版本2示例的修改。Jesse提供的链接也帮助很大。
以下是我在验证用户时运行的代码:
private void signInWithFacebook() {
mSessionTracker = new SessionTracker(getBaseContext(), new StatusCallback() {
@Override
public void call(Session session, SessionState state, Exception exception) {
}
}, null, false);
String applicationId = Utility.getMetadataApplicationId(getBaseContext());
mCurrentSession = mSessionTracker.getSession();
if (mCurrentSession == null || mCurrentSession.getState().isClosed()) {
mSessionTracker.setSession(null);
Session session = new Session.Builder(getBaseContext()).setApplicationId(applicationId).build();
Session.setActiveSession(session);
mCurrentSession = session;
}
if (!mCurrentSession.isOpened()) {
Session.OpenRequest openRequest = null;
openRequest = new Session.OpenRequest(SignUpChoices.this);
if (openRequest != null) {
openRequest.setDefaultAudience(SessionDefaultAudience.FRIENDS);
openRequest.setPermissions(Arrays.asList("user_birthday", "email", "user_location"));
openRequest.setLoginBehavior(SessionLoginBehavior.SSO_WITH_FALLBACK);
mCurrentSession.openForRead(openRequest);
}
}else {
Request.executeMeRequestAsync(mCurrentSession, new Request.GraphUserCallback() {
@Override
public void onCompleted(GraphUser user, Response response) {
Log.w("myConsultant", user.getId() + " " + user.getName() + " " + user.getInnerJSONObject());
}
});
}
}
为了测试,我从Facebooks身份验证返回后通过以下代码运行它:
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
if (mCurrentSession.isOpened()) {
Request.executeMeRequestAsync(mCurrentSession, new Request.GraphUserCallback() {
// callback after Graph API response with user object
@Override
public void onCompleted(GraphUser user, Response response) {
Log.w("myConsultant", user.getId() + " " + user.getName() + " " + user.getInnerJSONObject());
}
});
}
}
我通过实现自己的Session.openActiveSession()
方法解决了同样的问题:
private static Session openActiveSession(Activity activity, boolean allowLoginUI, StatusCallback callback, List<String> permissions) {
OpenRequest openRequest = new OpenRequest(activity).setPermissions(permissions).setCallback(callback);
Session session = new Builder(activity).build();
if (SessionState.CREATED_TOKEN_LOADED.equals(session.getState()) || allowLoginUI) {
Session.setActiveSession(session);
session.openForRead(openRequest);
return session;
}
return null;
}
我建议您阅读我们的登录教程,特别是在步骤3中。使用我们提供的登录按钮是最方便的方法,(参见authButton.setReadPermissions()
)
编辑:
在不使用登录按钮的情况下设置权限更为棘手,因为您必须手动完成所有会话管理。深入研究登录按钮的源代码,这行代码可能就是您所需要的。看起来您需要创建自己的Session.OpenRequest
并设置其属性,如权限、受众和登录行为,然后获取当前会话并在Session.OpenRequest
上调用openForRead()
。
尽管第一个问题是几个月前提出的,而且已经有了公认的答案,但还有另一个更优雅的解决方案可以在身份验证时向用户请求更多权限。此外,最近发布了Facebook SDK 3.5,刷新这个线程会很好:)
因此,这个开源库提供了优雅的解决方案:android simple facebook
设置
只需在Activity
类中添加下一行即可:
-
定义并选择所需的权限,如
friends_hometown
:Permissions[] permissions = new Permissions[] { Permissions.FRIENDS_HOMETOWN, Permissions.FRIENDS_PHOTOS, Permissions.PUBLISH_ACTION };
权限的好处在于,您不需要将READ和PUBLISH权限分开。你只要提到你需要什么,图书馆就会照顾剩下的。
-
通过放置
app_id
、namespace
和permissions
:构建和定义配置SimpleFacebookConfiguration configuration = new SimpleFacebookConfiguration.Builder() .setAppId("625994234086470") .setNamespace("sromkuapp") .setPermissions(permissions) .build();
-
并且,创建
SimpleFacebook
实例并设置此配置:SimpleFacebook simpleFacebook = SimpleFacebook.getInstance(Activity); simpleFacebook.setConfiguration(configuration);
现在,您可以运行以下方法:login、发布提要/故事,邀请…
登录
mSimpleFacebook.login(OnLoginListener);
注销
mSimpleFacebook.logout(OnLogoutListener);
有关更多示例和用法,请查看此页面:https://github.com/sromku/android-simple-facebook#actions-示例