我知道有人问过这个问题，但我找不到任何解决方案。我正在使用 Parse，用户可以在其中使用 Facebook、Twitter 和 Google+ 登录。截至目前，只有 Facebook 和 Twitter 功能齐全。

我已成功通过以下方式使用 Facebook 和 Twitter 登录:

private void onLoginButtonClicked() {
        LoginActivity.this.progressDialog = ProgressDialog.show(
                LoginActivity.this, "", "Logging in...", true);
        List<String> permissions = Arrays.asList("public_profile", "user_about_me",
                "user_relationships", "user_birthday", "user_location");
        ParseFacebookUtils.logIn(permissions, this, new LogInCallback() {
            @Override
            public void done(ParseUser user, ParseException err) {
                LoginActivity.this.progressDialog.dismiss();
                if (user == null) {
                    Log.d(IntegratingFacebookTutorialApplication.TAG,
                            "Uh oh. The user cancelled the Facebook login.");
                } else if (user.isNew()) {
                    Log.d(IntegratingFacebookTutorialApplication.TAG,
                            "User signed up and logged in through Facebook!");
                    showUserDetailsActivity();

                } else {
                    Log.d(IntegratingFacebookTutorialApplication.TAG,
                            "User logged in through Facebook!");
                moodpage();             

                }
            }
        });
    }

    private void onTwitterButtonClicked() {
        ParseTwitterUtils.logIn(this, new LogInCallback() {
              @Override
              public void done(ParseUser user, ParseException err) {
                if (user == null) {
                  Log.d("MyApp", "Uh oh. The user cancelled the Twitter login.");
                } else if (user.isNew()) {
                  Log.d("MyApp", "User signed up and logged in through Twitter!");
                  showUserDetailsActivity();        
                  } else {
                  Log.d("MyApp", "User logged in through Twitter!");
                  moodpage();               }
              }

            });
    }

我正试图通过解析与 Google+ 一起实现这一目标。有人建议我研究 Parse Rest API，但是，我不熟悉它，需要更多指导。

有些人建议我使用 https://github.com/Glamdring/google-plus-java-api/看起来很有前途，但我不确定我将如何解决这个问题。

例如假设我有

    googleButton = (Button) findViewById(R.id.twitterButton);
        googleButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {



                onGoogleButtonClicked();
            }
        });

private void onGoogleButtonClicked(); {
        //what to input here
    }

如有任何澄清，我们将不胜感激。

最佳答案

Parse.com 仅支持 facebook 和 twitter 但不支持 google+，因为你必须在云端 (parse.com) 端实现你自己的身份验证

这是一个漫长的过程，所以请耐心等待

按照以下步骤操作

1) 获取 实现此必要功能

放入onCreate()

mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
    .addConnectionCallbacks(this) //lets impement ConnectionCallbacks
    .addOnConnectionFailedListener(this).addApi(Plus.API) // lets implement OnConnectionFailedListener
    .addScope(Plus.SCOPE_PLUS_LOGIN).build();
    mGoogleApiClient.connect();

2)实现的OnConnectionFailedListener方法

@Override
public void onConnectionFailed(ConnectionResult result) {
    // TODO Auto-generated method stub
    if (!result.hasResolution()) {
        GooglePlayServicesUtil.getErrorDialog(result.getErrorCode(), getActivity(),
                0).show();
        return;
    }

    if (!mIntentInProgress) {
        // Store the ConnectionResult for later usage
        mConnectionResult = result;

        if (mSignInClicked) {
            // The user has already clicked 'sign-in' so we attempt to
            // resolve all
            // errors until the user is signed in, or they cancel.
            resolveSignInError();
        }
    }
}

/**
 * Method to resolve any signin errors for google plus
 * */
private void resolveSignInError() {
    if (mConnectionResult.hasResolution()) {
        try {
            mIntentInProgress = true;
            mConnectionResult.startResolutionForResult(getActivity(), RC_SIGN_IN);
        } catch (SendIntentException e) {
            mIntentInProgress = false;
            mGoogleApiClient.connect();
        }
    }
}

3) 调用 google+ 按钮点击

private void loginUsingGoolgePlus() {
    // TODO Auto-generated method stub
    if (!mGoogleApiClient.isConnecting()) {
        mSignInClicked = true;
        resolveSignInError();
    }

}

4) 已实现的 ConnectionCallbacks 方法

@Override
public void onConnected(Bundle arg0) {
    // TODO Auto-generated method stub
    mSignInClicked = false;
    Toast.makeText(getActivity(), "User is connected!", Toast.LENGTH_LONG).show();

    // Get user's information
    getProfileInformation();

}
@Override
public void onConnectionSuspended(int arg0) {
    // TODO Auto-generated method stub
    mGoogleApiClient.connect();

}

5) 此方法将为您提供个人资料信息

/**
 * Fetching user's information name, email, profile pic
 * */
private void getProfileInformation() {
    try {
        if (Plus.PeopleApi.getCurrentPerson(mGoogleApiClient) != null) {
            Person currentPerson = Plus.PeopleApi
                    .getCurrentPerson(mGoogleApiClient);
            String personName = currentPerson.getDisplayName();
            String personPhotoUrl = currentPerson.getImage().getUrl();
            String personGooglePlusProfile = currentPerson.getUrl();
            final String email = Plus.AccountApi.getAccountName(mGoogleApiClient);

            Log.e(TAG, "Name: " + personName + ", plusProfile: "
                    + personGooglePlusProfile + ", email: " + email
                    + ", Image: " + personPhotoUrl);

            // by default the profile url gives 50x50 px image only
            // we can replace the value with whatever dimension we want by
            // replacing sz=X
            personPhotoUrl = personPhotoUrl.substring(0,
                    personPhotoUrl.length() - 2)
                    + PROFILE_PIC_SIZE;

            new Thread(new Runnable() {

                @Override
                public void run() {
                    // TODO Auto-generated method stub
                    googleAuthWithParse(email);
                }
            }).start();
        } else {
            Toast.makeText(getActivity(),
                    "Person information is null", Toast.LENGTH_LONG).show();
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

6) 这很重要 在这里我们生成一个 token 并使用它和电子邮件 ID，我们在云端 (Parse.com) 调用脚本函数 accessGoogleUser(这个云代码只是 javascript main.js

-accessGoogleUser 将使用此 accessToken 为您提供 accessToken，您可以进行登录或注册

protected void googleAuthWithParse(String email) {
    // TODO Auto-generated method stub
     String scopes = "oauth2:" + Scopes.PLUS_LOGIN + " ";
     String googleAuthCode = null;
    try {
        googleAuthCode = GoogleAuthUtil.getToken(
                 getActivity(),                                           // Context context
                 email,                                             // String email
                 scopes,                                            // String scope
                 null                                      // Bundle bundle
         );
    } catch (UserRecoverableAuthException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    } catch (GoogleAuthException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }

     //Log.i(TAG, "Authentication Code: " + googleAuthCode);

    final HashMap<String, Object> params = new HashMap<String, Object>();
    params.put("code", googleAuthCode);
    params.put("email", email);
    //loads the Cloud function to create a Google user
    ParseCloud.callFunctionInBackground("accessGoogleUser", params, new FunctionCallback<Object>() {
        @Override
        public void done(Object returnObj, ParseException e) {
            if (e == null) {
                Log.e("AccessToken", returnObj.toString());
                ParseUser.becomeInBackground(returnObj.toString(), new LogInCallback() {
                    public void done(final ParseUser user, ParseException e) {
                        if (user != null && e == null) {
                            showToast("The Google user validated");

                            if(user.isNew()){
                                  //isNew means firsttime   
                            }else{

                              loginSuccess();
                            }
                        } else if (e != null) {
                            showToast("There was a problem creating your account.");
                            e.printStackTrace();
                            mGoogleApiClient.disconnect();
                        } else
                            showToast("The Google token could not be validated");
                    }
                });
            } else {
                        if (e != null) {

                            try {
                                JSONObject jsonObject = new JSONObject(e.getMessage());
                                showToast(jsonObject.getString("message"));
                            } catch (JSONException e1) {
                                // TODO Auto-generated catch block
                                e1.printStackTrace();
                            }
                            e.printStackTrace();
                            mGoogleApiClient.disconnect();
                        }
            }
        }
    });
}

7) 如何上传云端代码 main.js at parse.com cloud

仔细阅读并下载 Parse.exe 并从 here下载后做

将 parse.exe 和 ParseConsole.exe 放在“:\Windows\System32”文件夹中。然后在开始菜单中搜索Windows PowerShell，以管理员身份运行。等待窗口中的提示(我的是蓝色窗口)表明它在 ':\Windows\System32' 文件夹中。然后键入“.\ParseConsole.exe”并按回车键。

这是我们上传文件的方式

以下文件将在 C:\Users\xxxx 中创建，同时遵循 图像步骤

1) cloud
   - main.js
2) config
  ─ global.json
3) public
  ─ index.html

8) 从 here 下载 main.js并替换为在 cloud folder

注意:不要忘记将您的客户端 ID 和密码添加到此 main.js

9) 也检查这个。!!

Require Revocable Sessions should be false 在解析数据浏览器 -> 设置中 ->一般

有任何疑问都可以问我。我准备好寻求帮助了。!!

关于java - 在 Parse 上使用 Google+ 登录，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26440729/