Add links to your Transit pass

  • There are four ways to add links to a transit pass, including associating links with all passes of a class or individual passes.

  • App linking empowers call-to-actions within Google Wallet passes, allowing navigation to branded experiences by placing links at the bottom of the pass.

  • The appLinkData field is used to configure the link, accepting a URI or package name and allowing for Android or web app targets.

  • The displayText field, with a 30-character limit, is used to customize the link's display within the Google Wallet pass.

There are four ways to add links to a transit pass.

  • Use TransitClass.LinksModuleData to add links to all transit passes that are associated with the TransitClass.
  • Use TransitObject.LinksModuleData to add a link to a specific transit pass TransitObject.
  • Use TransitObject.appLinkData to place an app link at the bottom of that particular Pass.
  • Use TransitClass.appLinkData to place an app link at the bottom of all the passes of that class.

One benefit of app linking is that it empowers your call-to-action to navigate users to your branded experiences from Google Wallet. Links with this feature appear at the bottom of the Pass.

Feature example

Issuer Name Applink Data Example
Issuer

For a given transit pass, set the field TransitObject.appLinkData to the URI or Package name of your app or website.

See the format and context of the appLinkData field in the following source code: The displayText field is limited to 30 characters. 

  {
    "id": string,
    "classId": string,
    …
    …
    …
    "appLinkData": {
      "androidAppLinkInfo": {
        "appTarget": {
          "packageName": "com.google.android.gm",
        }
      },
      "webAppLinkInfo": {
        "appTarget": {
           "targetUri": {
              "uri": "https://mail.google.com/mail/",
              "description": "Web link for Gmail"
           }
        }
      }
      "displayText": {
        "defaultValue": {
           "value": "Our awesome app!"
        }
      }
    }
  }
For posterity the following implementation will also work. 
{
  "id": string,
  "classId": string,
  …
  …
  …
  "appLinkData": {
    "androidAppLinkInfo": {
      "appTarget": {
        "targetUri": {
          "uri": "https://play.google.com/store/apps/details?id=com.google.android.gm",
            "description": "Play store link for Gmail app"
        }
      }
    }
  }
}