facebook_auth

Description:

facebook auth

facebook_auth #
Simple facebook authentication plugin for flutter.
Configuration #
Suppose your facebook app id is 1234567890, client token is abcde12345, and app name is My App.
Android #
Official docs: https://developers.facebook.com/docs/facebook-login/android/
Define the following string resources in android/app/src/main/res/values/strings.xml:
<string name="facebook_app_id">1234567890</string>
<string name="fb_login_protocol_scheme">fb1234567890</string>
<string name="facebook_client_token">abcde12345</string>
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In AndroidManifest.xml:
<manifest {...}>
<uses-permission android:name="android.permission.INTERNET"/>
<application {...}>
<!-- facebook app id and token-->
<meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/facebook_app_id"/>
<meta-data android:name="com.facebook.sdk.ClientToken" android:value="@string/facebook_client_token"/>
<!-- facebook Chrome Custom Tabs-->
<activity android:name="com.facebook.FacebookActivity"
android:configChanges=
"keyboard|keyboardHidden|screenLayout|screenSize|orientation"
android:label="${appName}" />
<activity
android:name="com.facebook.CustomTabActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="@string/fb_login_protocol_scheme" />
</intent-filter>
</activity>
<!-- facebook Chrome Custom Tabs end-->
<!-- facebook end-->
</application>
</manifest>
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iOS #
Official docs: https://developers.facebook.com/docs/facebook-login/ios/
In info.plist add the following:
<key>CFBundleURLTypes</key>
<array>
<dict>
<key>CFBundleURLSchemes</key>
<array>
<string>fb1234567890</string>
</array>
</dict>
</array>
<key>FacebookAppID</key>
<string>1234567890</string>
<key>FacebookClientToken</key>
<string>abcde12345</string>
<key>FacebookDisplayName</key>
<string>My App</string>
<key>LSApplicationQueriesSchemes</key>
<array>
<string>fbapi</string>
<string>fb-messenger-share-api</string>
</array>
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Usage #

Add the plugin to pubspec.yaml: flutter pub add facebook_auth.
Import the plugin in your dart code: import 'package:facebook_auth/facebook_auth.dart';.
To authenticate user: Facebook().login(permissions) with permissions: List<string> being the permission list, for example ['public_profile', 'email'].
This function returns a Future object resolving a map of the following type:

{
'token': String
'userId': String
'expires': int // timeIntervalSince1970 * 1000
'applicationId': String
'lastRefresh': int // timeIntervalSince1970 * 1000
'isExpired': Boolean
'grantedPermissions': List<String>
'declinedPermissions': List<String>
'dataAccessExpirationTime': int // timeIntervalSince1970 * 1000
}
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To logout user: FacebookAuth().logout(): Future<void>.
Possible error code: check the error code with

try {
return {'idToken': await FacebookAuth().login(permissions)};
} on PlatformException catch (e) {
if (e.code == 'USER_CANCELLED') {
throw AppError('User has cancelled');
}
rethrow;
}
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For iOS: see https://github.com/tranvansang/flutter_facebook_auth/tree/master/ios/Classes/FacebookAuthDelegate.swift#L5
For Android: see https://github.com/tranvansang/flutter_facebook_auth/tree/master/android/src/main/kotlin/me/transang/plugins/facebook_auth/FacebookAuthDelegate.kt#L19

SDK versions #

Android

implementation 'com.facebook.android/facebook-login:16.0.1'
// implementation 'com.facebook.android:facebook-login:latest.release'
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iOS

s.dependency 'FBSDKCoreKit', '~> 16.1'
s.dependency 'FBSDKLoginKit', '~> 16.1'
s.dependency 'FBSDKShareKit', '~> 16.1'
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