无法在android studio中的android中导入facebook Session类

Question

我是 android 的新手，正在开发一个用于在登录后获取 facebook 个人资料信息的演示，我已经成功实现登录并想要获取个人资料信息，我得到了代码，但是在添加个人资料信息时，它无法导入必要的类（会话），任何人都可以帮我解决这个问题。 爪哇

import com.facebook.AccessToken;
import com.facebook.AccessTokenTracker;
import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.Profile;
import com.facebook.ProfileTracker;
import com.facebook.Session;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;

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private Session openActiveSession(Activity activity, boolean allowLoginUI,
                                       StatusCallback callback, List<String> permissions, Bundle savedInstanceState) {
        OpenRequest openRequest = new OpenRequest(activity).
                setPermissions(permissions).setLoginBehavior(SessionLoginBehavior.
                SSO_WITH_FALLBACK).setCallback(callback).
                setDefaultAudience(SessionDefaultAudience.FRIENDS);

        Session session = Session.getActiveSession();
        Log.d(LOG_TAG, "" + session);
        if (session == null) {
            Log.d(LOG_TAG, "" + savedInstanceState);
            if (savedInstanceState != null) {
                session = Session.restoreSession(this, null, fbStatusCallback, savedInstanceState);
            }
            if (session == null) {
                session = new Session(this);
            }
            Session.setActiveSession(session);
            if (session.getState().equals(SessionState.CREATED_TOKEN_LOADED) || allowLoginUI) {
                session.openForRead(openRequest);
                return session;
            }
        }
        return null;
    }

Answer 1

这是 FACEBOOK INTEGRATION 的工作代码：

1）创建一个xml：fragment_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:orientation="vertical"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivityFragment">

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="New Text"
        android:id="@+id/textView"
        android:layout_centerHorizontal="true"/>


    <com.facebook.login.widget.LoginButton
        android:id="@+id/login_button"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

2) Java 类，即 MainFragment.java

package example.com.facebook_integration;

/**
 * Created by dinesh sharma on 2/22/2016.
 */

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.facebook.AccessToken;
import com.facebook.AccessTokenTracker;
import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.GraphRequest;
import com.facebook.GraphResponse;
import com.facebook.HttpMethod;
import com.facebook.Profile;
import com.facebook.ProfileTracker;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;

import net.simplifiedcoding.androidlogin.R;

import org.json.JSONArray;
import org.json.JSONObject;

import java.util.ArrayList;
import java.util.Arrays;


/**
 * A placeholder fragment containing a simple view.
 */
public class MainFragment extends Fragment {

    private CallbackManager callbackManager;
    private TextView textView;
    private AccessTokenTracker accessTokenTracker;
    private ProfileTracker profileTracker;

    private FacebookCallback<LoginResult> callback = new FacebookCallback<LoginResult>() {
        @Override
        public void onSuccess(LoginResult loginResult) {
            AccessToken accessToken = loginResult.getAccessToken();
            Profile profile = Profile.getCurrentProfile();
            displayMessage(profile);
        }

        @Override
        public void onCancel() {

        }

        @Override
        public void onError(FacebookException e) {

        }
    };

    public MainFragment() {

    }


    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        FacebookSdk.sdkInitialize(getActivity().getApplicationContext());

        callbackManager = CallbackManager.Factory.create();

        accessTokenTracker= new AccessTokenTracker() {
            @Override
            protected void onCurrentAccessTokenChanged(AccessToken oldToken, AccessToken newToken) {

            }
        };

        profileTracker = new ProfileTracker() {
            @Override
            protected void onCurrentProfileChanged(Profile oldProfile, Profile newProfile) {
                displayMessage(newProfile);
            }
        };

        accessTokenTracker.startTracking();
        profileTracker.startTracking();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_main, container, false);
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        LoginButton loginButton = (LoginButton) view.findViewById(R.id.login_button);
        final ImageView imageView=(ImageView)view.findViewById(R.id.myImage);
        textView = (TextView) view.findViewById(R.id.textView);

        //loginButton.setReadPermissions("user_likes");
        loginButton.setFragment(this);
        loginButton.registerCallback(callbackManager, callback);

        loginButton.setReadPermissions(Arrays.asList("public_profile, email, user_birthday","user_likes","user_friends"));

        callbackManager = CallbackManager.Factory.create();

        // Callback registration
        loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
            @Override
            public void onSuccess(LoginResult loginResult) {
                // App code
                GraphRequest request = GraphRequest.newMeRequest(
                        loginResult.getAccessToken(),
                        new GraphRequest.GraphJSONObjectCallback() {
                            @Override
                            public void onCompleted(final JSONObject object, GraphResponse response)
                            {
                                Log.v("LoginActivity", response.toString());
                                try
                                {
                                    // Application code
                                    System.out.println("JSONRESPOMSEEE "+response.toString());

                                    String email = object.getString("email");
                                    String birthday = object.getString("birthday"); // 01/31/1980 format
                                    String name = object.getString("name");
                                    Profile profile = Profile.getCurrentProfile();
                                    Uri uri=(Uri)profile.getProfilePictureUri(200,200);
                                    System.out.println("Email  "+email+" Birthday "+birthday+name);
                                    System.out.println("Email  " + uri);
                                    final ArrayList arrayList=new ArrayList();


                                    new GraphRequest(
                                            AccessToken.getCurrentAccessToken(),
                                            "/me/likes",
                                            null,
                                            HttpMethod.GET,
                                            new GraphRequest.Callback() {
                                                public void onCompleted(GraphResponse response) {
                                                    try {
                                                        JSONObject json = new JSONObject(response.getRawResponse());
                                                        JSONArray jarray = json.getJSONArray("data");

                                                        for (int i = 0; i < jarray.length(); i++) {
                                                            JSONObject likes = jarray.getJSONObject(i);
                                                            String likeId = likes.getString("id");
                                                            String likeName = likes.getString("name");
                                                            String likeCreatedTime = likes.getString("created_time");
                                                            arrayList.add("Page Name "+likeName+" Time= "+likeCreatedTime+" ID= "+likeId);
                                                            System.out.println("My Name " + likeName + " " + likeCreatedTime);
                                                        }
                                                        System.out.println("ArrayList mine "+arrayList);
                                                        System.out.println("ArrayList mine size "+arrayList.size());


                                                    }
                                                    catch(Exception e)
                                                    {
                                                        System.out.println("My Exception "+e);
                                                    }
                                                }

                                            }
                                    ).executeAsync();



                                }
                                catch (Exception e)
                                {
                                    e.printStackTrace();
                                }
                            }
                        });
                Bundle parameters = new Bundle();
                parameters.putString("fields", "id,name,email,gender,birthday");
                request.setParameters(parameters);
                request.executeAsync();

            }

            @Override
            public void onCancel() {
                // App code
                Log.v("LoginActivity", "cancel");
            }

            @Override
            public void onError(FacebookException exception) {
                // App code
                Log.v("LoginActivity", exception.getCause().toString());
            }
        });
    }
    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        super.onActivityResult(requestCode, resultCode, data);
        callbackManager.onActivityResult(requestCode, resultCode, data);
    }

    private void displayMessage(Profile profile) {
        if(profile != null){
            textView.setText(profile.getName());
        }
    }

    @Override
    public void onStop() {
        super.onStop();
        accessTokenTracker.stopTracking();
        profileTracker.stopTracking();
    }

    @Override
    public void onResume()
    {
        super.onResume();
        Profile profile = Profile.getCurrentProfile();
        displayMessage(profile);
    }

}

3）再创建一个xml：activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">


    <fragment
        android:id="@+id/fragment"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:name="example.com.facebook_integration.MainFragment"
        ></fragment>
</RelativeLayout>

4) 创建你的 MainActivity.java

package example.com.facebook_integration;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;

import net.simplifiedcoding.androidlogin.R;

public class MainActivity extends AppCompatActivity
{

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

请参阅此链接https://www.simplifiedcoding.net/login-with-facebook-android-studio-using-facebook-sdk-4/

但是我已经在我的代码中完成了所有重要的更改，您可以在按照上述链接中的所有步骤操作后使用此代码。