Android--facebook Login without Loginbutton

1. Introduce Facebook project Lib and declare com.facebook.loginactivity,facebook_app_id in manifest

<activity            android:name= "com.facebook.LoginActivity"            android:label= "@string/app_name"            android: Theme= "@android: Style/theme.translucent.notitlebar"/><meta-data            android:name= " Com.facebook.sdk.ApplicationId "            android:value=" @string/facebook_app_id "/>

2. Call Mode:

1). Initialize Facebooklogin, set callback

Private Facebooklogin Facebooklogin;
Facebooklogin = new Facebooklogin (this);        Facebooklogin.setlogincallback (New Facebooklogin.logincallback ()        {            @Override public            void Onprelogin ()            {                showloadingdlg ();            }                        @Override public            void onloginsuccess (graphuser user)            {                                dismissloadingdlg ();                Toast.maketext (Getapplicationcontext (), user.getname () + "========", Toast.length_long). Show ();                        @Override public            void OnError ()            {                dismissloadingdlg ();            }        });

2). Overriding the Onactivityresult method

@Override public    void Onactivityresult (int requestcode, int resultcode, Intent data)    {        Super.onactivityresult (Requestcode, ResultCode, data);        Facebooklogin.onactivityresult (Requestcode, ResultCode, data);    }

3). Call the Facebooklogin.login () method and call the Onloginsuccess method to return the user information after the login is successful.

Facebooklogin.login ();

3. Tool Class Facebooklogin.java code:

Import Android.app.activity;import Android.content.context;import Android.content.intent;import Com.facebook.request;import Com.facebook.response;import Com.facebook.session;import com.facebook.SessionState;    Import Com.facebook.request.graphusercallback;import Com.facebook.model.graphuser;public class FacebookLogin{    private activity activity;    Public Facebooklogin (activity activity) {this.activity = activity;    } private Logincallback Logincallback; public void Onactivityresult (int requestcode, int resultcode, Intent data) {Onactivityresult (activity, REQUESTC    Ode, ResultCode, data);    }/** * Login */public void login () {login (activity);     }/** * Onactivityresult * @param context * @param requestcode * @param resultcode * @param data */private void Onactivityresult (context context, int requestcode, int resultcode, Intent data) {if (conte XT instanceof Activity) {SessIon.getactivesession (). Onactivityresult (Activity) context, Requestcode, ResultCode, data); }}/** * Login * @param context */private void Login (context context) {Session.openactiv             Esession (Activity) context, True, new Session.statuscallback () {//callback when Session changes state                @Override public void Call (Session session, sessionstate State, Exception Exception) {                if (session.isopened ()) {GetUserInfo (session);        }            }        });        if (logincallback! = null) {Logincallback.onprelogin (); }} private void GetUserInfo (final session session) {Request Request = Request.newmerequest (Session, new            Graphusercallback () {@Override public void oncompleted (graphuser user, Response Response)                   {try { if (logincallback! = null) {if (user! = null) {                        logincallback.onloginsuccess (user);                        } else {logincallback.onerror (); }}} catch (Exception e) {e.                    Printstacktrace ();                Logincallback.onerror ();        }            }        });    Request.executeasync (); }/** * Logout from Facebook */public void Logout () {Session session = Session.getactivesession (        ); if (session! = NULL) {if (!session.isclosed ()) {Session.closeandcleartokenin            Formation ();            }} else {session = new session (activity);            Session.setactivesession (session); Session. Closeandcleartokeninformation ();    }} public void Setlogincallback (Logincallback logincallback) {this.logincallback = Logincallback;        } public interface Logincallback {void Onprelogin ();        void Onloginsuccess (Graphuser user);    void OnError (); }}

　　

Android--facebook Login without Loginbutton