flutter_linkedin_login

A Flutter plugin for Sign in with LinkedIn

Installation

See the installation instructions on pub

Android

Follow the "Associate your Android app with your LinkedIn app" section of LinkedIn's Getting started with Android. Find your package name in the android/app/src/main/AndroidManifest.xml file. For the debug key hash value generation, remember to use 'android' as your password. Click update after adding your package and key in LinkedIn's developer console for your changes to take.

Open your MainActivity in your Android app/src/main/ directory and override the onActivityResult method with the following

//kotlin
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
  FlutterLinkedinLoginPlugin.onActivityResult(this, requestCode, resultCode, data)
  super.onActivityResult(requestCode, resultCode, data)
}

//java
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
  FlutterLinkedinLoginPlugin.onActivityResult(this, requestCode, resultCode, data);
  super.onActivityResult(requestCode, resultCode, data);
}

iOS

Follow the "Associate your iOS app with your LinkedIn app" section of LinkedIn's Getting started with iOS.

Open your AppDelegate in your ios/Runner directory and add the following function

//swift
//add #import <flutter_linkedin_login/FlutterLinkedinLoginPlugin.h>
//to your Running-Bridging-Header.h file
override func application(_ app: UIApplication, open: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
    if (FlutterLinkedinLoginPlugin.shouldHandle(open)) {
        return FlutterLinkedinLoginPlugin.application(app, open: open, sourceApplication: nil, annotation: nil)
    }
    return true
}

//objective-c
//add #import <flutter_linkedin_login/FlutterLinkedinLoginPlugin.h> at top of your AppDelegate.m
- (BOOL)application:(UIApplication *)application open:(NSURL *)open options:(UIApplicationOpenURLOptionsKey *)options {
    if ([FlutterLinkedinLoginPlugin shouldHandleUrl:url]) {
        return [FlutterLinkedinLoginPlugin application:application open:open sourceApplication:nil annotation: nil];
    }
    return YES;
}

Usage

Signing in

FlutterLinkedInLogin.login will check if an access token is still valid on the device. If not, then it will proceed with LinkedIn's sign in process. Login will throw exceptions with code detailed here. A user can either cancel login or cancel authorization.

  _signInWithLinkedIn() async {
    // Platform messages may fail, so we use a try/catch PlatformException.
    try {
      String status = await FlutterLinkedinLogin.login;
      debugPrint("login status: $status");
    } on PlatformException catch(e) {
      debugPrint("PlatformException code: ${e.code}, message: ${e.message}, toString: ${e.toString()}");
    }
  }

Getting LinkedIn Profile

FlutterLinkedinLogin.profile will retrieve the user's basic profile which includes their LinkedIn id, first name, last name, headline, industry, summary, and pictureUrl. Profile will communicate errors via http status codes as documented here.

  _getProfile() async {
    // Platform messages may fail, so we use a try/catch PlatformException.
    try {
      LinkedInProfile profile = await FlutterLinkedinLogin.profile;
      debugPrint("profile: $profile");
    } on PlatformException catch(e) {
      debugPrint("PlatformException httpStatusCode: ${e.code}, message: ${e.message}, toString: ${e.toString()}");
    }
  }

Clearing session

FlutterLinkedinLogin.clearSession clears the users access token, essentially logging them out. Even if a token doesn't exist, clearSession will return a success with message 'No session', therefore a PlatformException should never be thrown by clearSession.

  _clearSession() async {
    try {
      String status = await FlutterLinkedinLogin.clearSession;
      debugPrint("logout status: $status");
    } on PlatformException catch(e) { //This should never happen
      debugPrint("PlatformException code: ${e.code}, message: ${e.message}, toString: ${e.toString()}");
    }
  }

Additional API calls

Submit an issue if you would like to see additional LinkedIn APIs exposed. This simple implementation was enough for my purposes.