在登录Facebook App并授权我的应用程序后，如何才能正确获取访问令牌和其他信息？ [Android]产品

Question

我正在使用它 。 在我的authorized()方法的Facebook.java中，我调用了startSingleSignOn和startDialogAuth ，我正在使用DEFAULT_AUTH_ACTIVITY_CODE而不是FORCE_DIALOG_AUTH

public void authorize（Activity activity，String [] permissions，int activityCode，final DialogListener listener）{

    boolean singleSignOnStarted = false;

    mAuthDialogListener = listener;

    // Prefer single sign-on, where available.
    if (activityCode >= 0) {
        singleSignOnStarted = startSingleSignOn(activity, mAppId,
                permissions, activityCode);
    }
    // Otherwise fall back to traditional dialog.
    if (!singleSignOnStarted) {
        startDialogAuth(activity, permissions);
    }
}

我注意到在我的startDialogAuth它设置了AccessToken和AccessExpires

private void startDialogAuth(Activity activity, String[] permissions) {

    Bundle params = new Bundle();
    if (permissions.length > 0) {
        params.putString("scope", TextUtils.join(",", permissions));
    }
    CookieSyncManager.createInstance(activity);
    dialog(activity, LOGIN, params, new DialogListener() {

        public void onComplete(Bundle values) {

            // ensure any cookies set by the dialog are saved
            CookieSyncManager.getInstance().sync();
            setAccessToken(values.getString(TOKEN));
            setAccessExpiresIn(values.getString(EXPIRES));
            if (isSessionValid()) {
                Util.logd("Facebook-authorize", "Login Success! access_token="
                        + getAccessToken() + " expires="
                        + getAccessExpires());

                mAuthDialogListener.onComplete(values);
            } else {
                mAuthDialogListener.onFacebookError(new FacebookError(
                                "Failed to receive access token."));
            }
        }

        public void onError(DialogError error) {
            Util.logd("Facebook-authorize", "Login failed: " + error);
            mAuthDialogListener.onError(error);
        }

        public void onFacebookError(FacebookError error) {
            Util.logd("Facebook-authorize", "Login failed: " + error);
            mAuthDialogListener.onFacebookError(error);
        }

        public void onCancel() {
            Util.logd("Facebook-authorize", "Login canceled");
            mAuthDialogListener.onCancel();
        }
    });
}

并且在startSingleSignOn它看起来像这样

private boolean startSingleSignOn(Activity activity, String applicationId,
        String[] permissions, int activityCode) {
    boolean didSucceed = true;
    Intent intent = new Intent();

    intent.setClassName("com.facebook.katana",
            "com.facebook.katana.ProxyAuth");
    intent.putExtra("client_id", applicationId);

    if (permissions.length > 0) {
        intent.putExtra("scope", TextUtils.join(",", permissions));
    }

    // Verify that the application whose package name is
    // com.facebook.katana.ProxyAuth
    // has the expected FB app signature.
    if (!validateActivityIntent(activity, intent)) {
        return false;
    }

    mAuthActivity = activity;
    mAuthPermissions = permissions;
    mAuthActivityCode = activityCode;

    try {
        activity.startActivityForResult(intent, activityCode);
    } catch (ActivityNotFoundException e) {
        didSucceed = false;
    }

    return didSucceed;
}

我想知道它在哪里设置登录时需要的Access Token ，我面临的问题是用户安装了Facebook app程序并且已经授权我的应用程序，它只会显示一个对话框（正在加载）并显示一个白屏然后解雇但接下来没有任何事情发生。 它不会从记录的Facebook app获取用户的信息。 但是当用户没有Facebook app它会显示WebView并且工作正常，它会正确登录。 在调试它时我还注意到它没有进入我的函数LoginDialogListener这里它实现了Facebook.DialogListener （当安装了facebook app时）可能因为在startSingleSignOn它没有调用CookieSyncManager.createInstance(activity); dialog(activity, LOGIN, params, new DialogListener() { CookieSyncManager.createInstance(activity); dialog(activity, LOGIN, params, new DialogListener() {

这是我的activity代码，它调用facebook.authorize

public void setFacebookConnection() {
    facebook = new Facebook(Constants.FACEBOOK_APP_ID);
    facebookAsyncRunner = new AsyncFacebookRunner(facebook);

    facebook.authorize(this, Constants.FACEBOOK_PERMISSIONS, new LoginDialogListener());
}

private class LoginDialogListener implements Facebook.DialogListener {
    public void onComplete(Bundle values) {
        Log.d(TAG, "LoginONComplete");
        String token = facebook.getAccessToken();
        long token_expires = facebook.getAccessExpires();
        Log.d(TAG, "AccessToken: " + token);
        Log.d(TAG, "AccessExpires: " + token_expires);

        if (isPublishStreamAuthorized()) {
            facebookSharedPreferences = PreferenceManager
                    .getDefaultSharedPreferences(context);
            facebookSharedPreferences
                    .edit()
                    .putLong(Constants.FACEBOOK_ACCESS_EXPIRES,
                            token_expires).commit();
            facebookSharedPreferences.edit()
                    .putString(Constants.FACEBOOK_ACCESS_TOKEN, token)
                    .commit();
            facebookAsyncRunner.request("me", new IDRequestListener());
        } else {
            logoutFacebook();
        }

    }

    public void onFacebookError(FacebookError e) {
        Log.d(TAG, "FacebookError: " + e.getMessage());
    }

    public void onError(DialogError e) {
        Log.d(TAG, "Error: " + e.getMessage());
        Toast.makeText(getApplicationContext(), Constants.NO_INTERNET_CONNECTION,
                Toast.LENGTH_LONG).show();
    }

    public void onCancel() {
        Log.d(TAG, "OnCancel");
        logoutFacebook();
    }

}

看来我的facebook.getAccessToken(); 在我的活动中返回null，在调用facebook.authorize()后尝试在我的setFacebookConnection()调用

你能帮我么？ 我需要尽快解决这个问题。 非常感谢。

更新

我找到了这个并尝试了第3步，但它最终再次打开了WebView 。

***更新

我终于通过调用onActivityResult()获取access token ，但是只有在我关闭应用程序并再次打开它之后才会显示获取数据这里是我的代码，其中FACEBOOK_AUTH_RESULT_CODE值我将其更改为32665。

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == Constants.FACEBOOK_AUTH_RESULT_CODE) {
        facebook.authorizeCallback(requestCode, resultCode, data);
    } else {
        Log.e(TAG, "onActivityResult Error : Authentication Error");
    }
} 

Answer 1

gradle这个：

 compile 'com.facebook.android:facebook-android-sdk:[4,5)' 

strings.xml中

 <string name="facebook_app_id">YOUR_APP_ID</string> 

AndroidManifest.xml在'application'标签内添加：

 <meta-data
        android:name="com.facebook.sdk.ApplicationId"
        android:value="@string/facebook_app_id" />

创建此以初始化FacebookSDK：

public class MainApp extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
        FacebookSdk.sdkInitialize(getApplicationContext());
    }
}

将其添加到AndroidManifest.xml，将“application”标记作为名称：

<application
    android:name=".MainApp"

在您的活动布局中添加Facebook登录按钮：

<?xml version="1.0" encoding="utf-8"?>
<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"
tools:context="com.example.app.FacebookLoginActivity">

 <com.facebook.login.widget.LoginButton
        android:id="@+id/login_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="30dp"
        android:layout_marginBottom="30dp" />

</RelativeLayout>

你的FacebookLoginActivity：在这里你可以获得你的Facebook令牌。

public class FacebookLoginActivity extends AppCompatActivity{

private CallbackManager callbackManager;
private LoginButton loginButton;
private String FB_TOKEN;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_signin);
    callbackManager = CallbackManager.Factory.create();
    loginButton = (LoginButton) findViewById(R.id.login_button);
    loginButton.setReadPermissions("public_profile", "user_friends", "email", "user_birthday");
    loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
        @Override
        public void onSuccess(LoginResult loginResult) {

            /**
             * HERE YOU CAN GET YOUR FACEBOOK TOKEN!!!!
             **/
            FB_TOKEN=loginResult.getAccessToken().getToken();
        }

        @Override
        public void onCancel() {
        }

        @Override
        public void onError(FacebookException exception) {
        }
    });
}

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

}

如果您需要使用自定义Facebook按钮：

public class FacebookLoginActivity extends AppCompatActivity{

private CallbackManager callbackManager;
private Button loginButton;
private String FB_TOKEN;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_signin);
    callbackManager = CallbackManager.Factory.create();
    loginButton = (Button) findViewById(R.id.login_button);
    LoginManager.getInstance().registerCallback(callbackManager,
            new FacebookCallback<LoginResult>() {
                @Override
                public void onSuccess(LoginResult loginResult) {
                    /**
                    * HERE YOU CAN GET YOUR FACEBOOK TOKEN!!!!
                    **/
                    FB_TOKEN=loginResult.getAccessToken().getToken();
                }

                @Override
                public void onCancel() {
                }

                @Override
                public void onError(FacebookException exception) {
                    Log.e("onError", exception.getMessage());
                }
            });
    loginButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                LoginManager.getInstance().logInWithReadPermissions(FacebookLoginActivity.this, Arrays.asList("public_profile", "user_friends", "email"));
            }
    });
}

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

}

Answer 2

1）您不需要使用'provider'标签。

2）com.facebook.FacebookActivity是Facebook自己的活动，FacebookLoginActivity - 你的。

3）只需使用此代码获取性别，区域设置，验证，电子邮件：

    GraphRequest request = GraphRequest.newMeRequest(
        AccessToken.getCurrentAccessToken(),
        new GraphRequest.GraphJSONObjectCallback() {
            @Override
            public void onCompleted(
                    JSONObject object,
                    GraphResponse response) {
            }
        });
    Bundle parameters = new Bundle();
    parameters.putString("fields", "id,name,gender,verified,locale,email");
    request.setParameters(parameters);
    request.executeAsync();

你能分享一下你的课吗？ 我需要有关“对LoginManager.onActivityResult的意外调用”的更多信息