我想通过客户经理类检索token。这是适用于twitter但不适用于facebook的示例代码请帮助我。publicclassAccountManagerActivityextendsActivity{AccountManagermAccountManager;AccountManagerFuturec;Stringtoken;/**Calledwhentheactivityisfirstcreated.*/@OverridepublicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);s