Android--Facebook Login without LoginButton

1.引入facebook 工程lib，在Manifest中声明com.facebook.LoginActivity，facebook_app_id

<activityandroid:name="com.facebook.LoginActivity"android:label="@string/app_name"android:theme="@android:style/Theme.Translucent.NoTitleBar" /><meta-dataandroid:name="com.facebook.sdk.ApplicationId"android:value="@string/facebook_app_id" />

2.调用方式：

1).初始化facebookLogin，设置回调

private FacebookLogin facebookLogin;
facebookLogin = new FacebookLogin(this);facebookLogin.setLoginCallBack(new FacebookLogin.LoginCallBack(){@Overridepublic void onPreLogin(){showLoadingDlg();}@Overridepublic void onLoginSuccess(GraphUser user){dismissLoadingDlg();Toast.makeText(getApplicationContext(), user.getName()+"========", Toast.LENGTH_LONG).show();}@Overridepublic void onError(){dismissLoadingDlg();}});

 

2).重写onActivityResult方法

 @Overridepublic void onActivityResult(int requestCode, int resultCode, Intent data){super.onActivityResult(requestCode, resultCode, data);facebookLogin.onActivityResult(requestCode, resultCode, data);}

3).调用facebookLogin.login()方法，登录成功后会调用onLoginSuccess方法返回用户信息user

facebookLogin.login();　

3.工具类FacebookLogin.java代码：

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, requestCode, 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 (context instanceof Activity){Session.getActiveSession().onActivityResult((Activity) context, requestCode, resultCode, data);}}/*** Login* @param context*/private void login(Context context){Session.openActiveSession((Activity) context, true, new Session.StatusCallback(){// callback when session changes state
            @Overridepublic 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(){@Overridepublic 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.closeAndClearTokenInformation();}}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();}
}