如何使用Facebook SDK android获取Facebook照片，全名，性别

Question

我正在开发一个Android应用程序，其中任何使用我们的应用程序登录Facebook的Android用户，我需要从Facebook中提取他的照片，性别，全名。我正在使用Facebook SDK。

在Facebook SDK的帮助下，我可以登录Facebook，但我不确定如何从Facebook中提取他的照片，性别和全名？

以下是我用来登录Facebook的代码。我遵循了本教程

public class SessionLoginFragment extends Fragment {
    private static final String URL_PREFIX_FRIENDS = "https://graph.facebook.com/me/friends?access_token=";
    private TextView textInstructionsOrLink;
    private Button buttonLoginLogout;
    private Session.StatusCallback statusCallback = new SessionStatusCallback();
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment, container, false);
    buttonLoginLogout = (Button) view.findViewById(R.id.buttonLoginLogout);
    textInstructionsOrLink = (TextView) view.findViewById(R.id.instructionsOrLink);
    Settings.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS);
    Session session = Session.getActiveSession();
    if (session == null) {
        if (savedInstanceState != null) {
        session = Session.restoreSession(getActivity(), null, statusCallback,
            savedInstanceState);
        }
        if (session == null) {
        session = new Session(getActivity());
        }
        Session.setActiveSession(session);
        if (session.getState().equals(SessionState.CREATED_TOKEN_LOADED)) {
        session.openForRead(new Session.OpenRequest(this).setCallback(statusCallback));
        }
    }
    updateView();
    return view;
    }
    @Override
    public void onStart() {
    super.onStart();
    Session.getActiveSession().addCallback(statusCallback);
    }
    @Override
    public void onStop() {
    super.onStop();
    Session.getActiveSession().removeCallback(statusCallback);
    }
    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    Session.getActiveSession().onActivityResult(getActivity(), requestCode, resultCode, data);
    }
    @Override
    public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    Session session = Session.getActiveSession();
    Session.saveSession(session, outState);
    }
    private void updateView() {
    Session session = Session.getActiveSession();
    if (session.isOpened()) {
        Log.d("Hello", URL_PREFIX_FRIENDS + session.getAccessToken());
        Intent i = new Intent(getActivity(), ThesisProjectAndroid.class);
        startActivity(i);
    } else {
        Log.d("Hello", "Login Failed");
        textInstructionsOrLink.setText(R.string.instructions);
        buttonLoginLogout.setText(R.string.login);
        buttonLoginLogout.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {
            onClickLogin();
        }
        });
    }
    }
    private void onClickLogin() {
    Session session = Session.getActiveSession();
    if (!session.isOpened() && !session.isClosed()) {
        session.openForRead(new Session.OpenRequest(this).setCallback(statusCallback));
    } else {
        Session.openActiveSession(getActivity(), this, true, statusCallback);
    }
    }
    private void onClickLogout() {
    Session session = Session.getActiveSession();
    if (!session.isClosed()) {
        session.closeAndClearTokenInformation();
    }
    }
    private class SessionStatusCallback implements Session.StatusCallback {
    @Override
    public void call(Session session, SessionState state, Exception exception) {
        updateView();
    }
    }
}

谁能告诉我我需要在上面的类中在哪里进行更改以获得我需要的所有三个信息。据我所知，如果我能够获得那个人的Facebook唯一ID，我就可以得到我猜到的所有信息。有什么想法吗？

Answer 1

使用新的 API 和 Facebook 的自定义按钮，您可以使用以下代码：

在 gradle 文件中放入下面的 gradle：

 compile 'com.facebook.android:facebook-android-sdk:4.20.0'
  Newer sdk does not need initializaion .
    private CallbackManager callbackManager;
    @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    FacebookSdk.sdkInitialize(LoginActivity.this);//Is now depricated
    setContentView(R.layout.activity_login);
    callbackManager = CallbackManager.Factory.create();
    }

活动结果：

        @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
        callbackManager.onActivityResult(requestCode, resultCode, data);
         }

按钮点击：

   @Override
    public void onClick(View v) {
    switch (v.getId())
    {
        case R.id.btn_f_sign_in_login:
            LoginManager.getInstance().logInWithReadPermissions(
                    this,
                    Arrays.asList("user_friends", "email", "public_profile"));
            LoginManager.getInstance().registerCallback(callbackManager,
                    new FacebookCallback<LoginResult>() {
                        @Override
                        public void onSuccess(LoginResult loginResult) {
                            setFacebookData(loginResult);
                        }
                        @Override
                        public void onCancel() {
                        }
                        @Override
                        public void onError(FacebookException exception) {
                        }
                    });
            break;
    }
}

设置Facebook数据：

     private void setFacebookData(final LoginResult loginResult)
       {
    GraphRequest request = GraphRequest.newMeRequest(
            loginResult.getAccessToken(),
            new GraphRequest.GraphJSONObjectCallback() {
                @Override
                public void onCompleted(JSONObject object, GraphResponse response) {
                    // Application code
                    try {
                        Log.i("Response",response.toString());
                        String email = response.getJSONObject().getString("email");
                        String firstName = response.getJSONObject().getString("first_name");
                        String lastName = response.getJSONObject().getString("last_name");
                        String gender = response.getJSONObject().getString("gender");

                        Profile profile = Profile.getCurrentProfile();
                        String id = profile.getId();
                        String link = profile.getLinkUri().toString();
                        Log.i("Link",link);
                        if (Profile.getCurrentProfile()!=null)
                        {
                            Log.i("Login", "ProfilePic" + Profile.getCurrentProfile().getProfilePictureUri(200, 200));
                        }
                       Log.i("Login" + "Email", email);
                        Log.i("Login"+ "FirstName", firstName);
                        Log.i("Login" + "LastName", lastName);
                        Log.i("Login" + "Gender", gender);

                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            });
    Bundle parameters = new Bundle();
    parameters.putString("fields", "id,email,first_name,last_name,gender");
    request.setParameters(parameters);
    request.executeAsync();
}

获取已关闭您的应用程序的Facebook好友：

替换参数.putString（"fields"， "id，email，first_name，last_name"）;

with parameters.putString（"fields"， "id，email，first_name，last_name，friends"）;

添加以下逻辑以获取好友数据

                if (object.has("friends")) {
                  JSONObject friend = object.getJSONObject("friends");
                  JSONArray data = friend.getJSONArray("data");
                  for (int i=0;i<data.length();i++){
                 Log.i("idddd",data.getJSONObject(i).getString("id"));
                  }
             }

Answer 2

在 StatusCallback 函数中，您可以从 GraphUser 对象获取详细信息

private class SessionStatusCallback implements Session.StatusCallback {
    private String fbAccessToken;
    @Override
    public void call(Session session, SessionState state, Exception exception) {
        updateView();
        if (session.isOpened()) {
            fbAccessToken = session.getAccessToken();
            // make request to get facebook user info
            Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {
                @Override
                public void onCompleted(GraphUser user, Response response) {
                    Log.i("fb", "fb user: "+ user.toString());
                    String fbId = user.getId();
                    String fbAccessToken = fbAccessToken;
                    String fbName = user.getName();
                    String gender = user.asMap().get("gender").toString();
                    String email = user.asMap().get("email").toString();
                    Log.i("fb", userProfile.getEmail());
                }
            });
        }
    }
}

Answer 3

使用新的 API

private void importFbProfilePhoto() {
    if (AccessToken.getCurrentAccessToken() != null) {
        GraphRequest request = GraphRequest.newMeRequest(
                AccessToken.getCurrentAccessToken(), new GraphRequest.GraphJSONObjectCallback() {
                    @Override
                    public void onCompleted(JSONObject me, GraphResponse response) {
                        if (AccessToken.getCurrentAccessToken() != null) {
                            if (me != null) {
                                String profileImageUrl = ImageRequest.getProfilePictureUri(me.optString("id"), 500, 500).toString();
                                Log.i(LOG_TAG, profileImageUrl);
                            }
                        }
                    }
                });
        GraphRequest.executeBatchAsync(request);
    }
}

Answer 4

请参阅以下教程

你必须发出一个请求来获取 GraphUser-Object。使用此对象，您可以获得所需的信息：GraphUser user.getName();、user.getId();等。

Answer 5

使用 Sdk v4.28 和登录用户，很容易在 LoginManager 的成功回调中（或之后）调用Profile.getCurrentProfile()：

facebookCallbackManager = CallbackManager.Factory.create();
LoginManager.getInstance().registerCallback(facebookCallbackManager,
            new FacebookCallback<LoginResult>() {
                @Override
                public void onSuccess(LoginResult loginResult{ 
                    //Profile.getCurrentProfile()
                }
                @Override
                public void onCancel() {
                }
                @Override
                public void onError(FacebookException exception) {
                }
            });

您可以使用图形 API，但文档本身说使用上面的登录用户。

Answer 6

如果您将获得空配置文件，请使用配置文件跟踪器 if（Profile.getCurrentProfile（） == null） {

            mProfileTracker = new ProfileTracker() {
                @Override
                protected void onCurrentProfileChanged(Profile profile, Profile profile2) {
                    // profile2 is the new profile
                    Log.d("facebook - profile", profile2.getFirstName());
                    profile_firstname=profile2.getFirstName();
                    profile_lastname=profile2.getLastName();
                   // Toast.makeText(LoginActivity.this, "User ID : "+ profile2.getFirstName(), Toast.LENGTH_LONG).show();
                    mProfileTracker.stopTracking();
                }
            };
        }