如何在安卓中集成Facebook并登录并获取用户详细信息和注销

Question

如何在Android中集成Facebook并登录并获取用户详细信息和注销。

代码JSONObject json = Util.parseJson(mFacebook.request("me"));给了我 null。
OnComplete()后我从捆绑包中获取访问令牌。

Answer 1

你应该发布更多你所做的代码，这样更容易理解你的问题。此外，如果您收到错误，请发布 logcat 输出。查看此链接。这是适用于Android的Facebook开发人员教程，它将逐步将Facebook整合到您的应用程序中。现在，本教程有时可能含糊不清且难以理解，因此请查看此链接。这是一个视频教程，可引导您完成这些步骤，并且非常容易遵循。好吧，祝你好运！

Answer 2

这对我来说是可行的，试试这个：

    public class FacebookIntegrationActivity extends AppCompatActivity {
    ActivityFacebookIntegrationBinding binding;
    CallbackManager callbackManager;
    private static final String EMAIL = "email";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    binding = DataBindingUtil.setContentView(FacebookIntegrationActivity.this, 
    R.layout.activity_facebook_integration);
    //[apply click on view]
    applyClickOnView();
    //method to integrate facebook
    facebookIntegration();
  }
  private void applyClickOnView() {
       binding.btnCustom.setOnClickListener(new View.OnClickListener() {
       @Override
       public void onClick(View v) {
            LoginManager.getInstance().logOut();
LoginManager.getInstance().logInWithReadPermissions(FacebookIntegrationActivity.this, 
 Arrays.asList("public_profile", "email"));
        }
    });
 }
  //[for facebook integration]
    private void facebookIntegration() {
    callbackManager = CallbackManager.Factory.create();
    LoginManager.getInstance().registerCallback(callbackManager,
            new FacebookCallback<LoginResult>() {
                @Override
                public void onSuccess(LoginResult loginResult) {
                    // App code to get user profile
                    requestUserProfile(loginResult);
                }
                @Override
                public void onCancel() {
                    String s = "";
                    //code on cancling of request
                }
                @Override
                public void onError(FacebookException exception) {
                    String s = "";
                    //code on error occurence
                }
            });
     }
   private void requestUserProfile(LoginResult loginResult) {
       final GraphRequest request = 
       GraphRequest.newMeRequest(loginResult.getAccessToken(), new 
       GraphRequest.GraphJSONObjectCallback() {
        @Override
        public void onCompleted(JSONObject me, GraphResponse response) {
            if (response.getError() != null) {
            } else {
                try {
                    String id = "";
                    String firstName = "";
                    String lastName = "";
                    String email = "";
                    String userPicUrl = "";
                    String userName = "";
                    if (response.getJSONObject().has("id")) {
                        id = response.getJSONObject().get("id").toString();
                    }
                    if (response.getJSONObject().has("first_name")) {
                        firstName = 
                    response.getJSONObject().get("first_name").toString();
                        userName = firstName;
                    }
                    if (response.getJSONObject().has("last_name")) {
                        lastName = 
                    response.getJSONObject().get("last_name").toString();
                        if (!firstName.equals("")) {
                            userName = firstName + " " + lastName;
                        } else {
                            userName = lastName;
                        }
                    }
                    if (response.getJSONObject().has("email")) {
                        email = response.getJSONObject().get("email").toString();
                    }
                    if (response.getJSONObject().has("id")) {
                        userPicUrl = "https://graph.facebook.com/" + id + "/picture? 
                       type=normal";
                    }
                    //send data to api......in live projects 
              //else display on the view........
                    binding.txtName.setText(userName);
                    binding.txtEmail.setText(email);
            //use picasso or glide to display user profile picture in any 
             ImageView                
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        }
    });
    Bundle parameters = new Bundle();
    parameters.putString("fields", "id, first_name, last_name, email");
    request.setParameters(parameters);
    request.executeAsync();
   }
   @Override
   protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    callbackManager.onActivityResult(requestCode, resultCode, data);
    super.onActivityResult(requestCode, resultCode, data);
   }

  }