【发布时间】：2018-04-07 01:32:53
【问题描述】：
我已经尝试学习这个 Facebook SDK 几天了，但我似乎被卡住了。我正在为一个学校项目构建一个基本应用程序，当用户第一次登录时，Facebook 允许您输入电子邮件和密码并登录。一旦用户单击“注销”，我就会注销。 。 据我所知。现在，当我返回单击登录时，它会自动重新登录到最后一个帐户。没有给我切换帐户的选项。我该如何解决这个问题？
编辑*** 当我登录，然后注销，然后再次单击登录时，它会显示“您之前使用 Facebook 登录到“APP NAME”。您要继续吗？”
唯一的选择是取消和继续。我什至无法尝试与其他人登录！这是我的问题，如果有人能解决它，那就太棒了！同时我会继续尝试不同的事情
package example.com.demo_app;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import com.facebook.AccessToken;
import com.facebook.AccessTokenTracker;
import com.facebook.CallbackManager;
import com.facebook.FacebookActivity;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.GraphRequest;
import com.facebook.GraphResponse;
import com.facebook.appevents.AppEventsLogger;
import com.facebook.login.LoginBehavior;
import com.facebook.login.LoginManager;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;
import com.facebook.login.widget.ProfilePictureView;
import org.json.JSONException;
import org.json.JSONObject;
import org.w3c.dom.Text;
public class MainActivity extends AppCompatActivity {
LoginButton fbButton;
CallbackManager callBackManager;
TextView nameBox;
TextView emailBox;
TextView idBox;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fbButton = (LoginButton)findViewById(R.id.login_button);
fbButton.setReadPermissions("email", "public_profile");
callBackManager = CallbackManager.Factory.create();
fbButton.registerCallback(callBackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
String user_id = loginResult.getAccessToken().getUserId();
GraphRequest graphRequest = GraphRequest.newMeRequest(loginResult.getAccessToken(), new GraphRequest.GraphJSONObjectCallback() {
@Override
public void onCompleted(JSONObject object, GraphResponse response) {
if (object != null)
{
displayInfo(object);
}
else {
LoginManager.getInstance().logOut();
}
}
});
Bundle parameters = new Bundle();
parameters.putString("fields", "first_name, last_name, email, id");
graphRequest.setParameters(parameters);
graphRequest.executeAsync();
}
@Override
public void onCancel() {
}
@Override
public void onError(FacebookException error) {
}
});
}
public void displayInfo(JSONObject object)
{
String first_name = "";
String last_name = "";
String email = "";
String id = "";
try {
first_name = object.getString("first_name");
last_name = object.getString("last_name");
email = object.getString("email");
id = object.getString("id");
} catch (JSONException e) {
e.printStackTrace();
}
nameBox = (TextView)findViewById(R.id.txtFullName);
emailBox = (TextView)findViewById(R.id.txtEmail);
idBox = (TextView)findViewById(R.id.txtID);
nameBox.setText(first_name+ " " +last_name);
emailBox.setText(email);
idBox.setText(id);
ProfilePictureView profilePictureView;
profilePictureView = (ProfilePictureView) findViewById(R.id.friendProfilePicture);
profilePictureView.setProfileId(id);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
callBackManager.onActivityResult(requestCode, resultCode, data);
}
}
【问题讨论】：
标签： android facebook logout facebook-sdk-4.0