launchFacebookApp function

Future launchFacebookApp(String? pageId, String fallbackUrl, { String? type, })

Implementation

Future launchFacebookApp(String? pageId, String fallbackUrl,
    {String? type}) async {
  if (pageId == null) {
    launchExternalUrl(fallbackUrl);
    return;
  }
  String fbProtocolUrl;

  ///on Android,
  if (Platform.isAndroid) {
    if (type != null) {
      fbProtocolUrl = 'fb://$type/$pageId';
    } else {
      fbProtocolUrl = 'fb://page/$pageId';
    }
  } else {
    fbProtocolUrl = 'fb://profile/$pageId';
  }

  try {
    bool result = await launchUrlString(
      fbProtocolUrl,
      mode: LaunchMode.externalApplication,
    );
    if (!result) {
      throw "Unable to launch Facebook app";
    }
  } catch (e) {
    launchUrlString(
      fallbackUrl,
      mode: LaunchMode.externalApplication,
    );
  }
}