Why is app link and verification not working on android

Question

Cannot verify app link for my app on android devices. Using example.com for domain, and com.example.app for app id instead of the real one.

I can launch app by adb shell am start -W -a android.intent.action.VIEW -d https://example.com/ com.example.app
launching with adb shell am start -W -a android.intent.action.VIEW -d https://example.com/, with just url, doesn't work and chrome opens with the link.
App Info > Open by Default > Verified links for this com.example.app is empty and greyed out.
adb shell pm get-app-links com.example.app returns/prints nothing
Could not find any logs with adb logcat -e "(IntentFilterIntentOp|IntentFilterIntentSvc)" when installing this app, opening it, keeping it open for more than 20 secs, or re-verifying the app-link with adb shell pm verify-app-links -- re-verify
curl https://example.com/.well-known/assetlinks.json -I returns the following output:

HTTP/1.1 200 OK
Date: Thu, 01 Jun 2023 09:05:51 GMT
Content-Type: application/json
Content-Length: 337
Connection: keep-alive
Strict-Transport-Security: max-age=63072000; includeSubdomains;
X-Content-Type-Options: nosniff
Last-Modified: Thu, 01 Jun 2023 08:40:55 GMT
ETag: "151-5fd0d65109bf8"
Accept-Ranges: bytes
Cache-Control: max-age=2592000
Expires: Sat, 01 Jul 2023 09:05:51 GMT
Vary: User-Agent
X-FRAME-OPTIONS: SAMEORIGIN
X-XSS-Protection: 1; mode=block
Content-Security-Policy: default-src 'self' 'unsafe-inline' 'unsafe-eval' data: https: *.googleadservices.com *.doubleclick.net *.google.com *.googletagmanager.com *.gstatic.com *.googleapis.com *.facebook.net; frame-ancestors 'self'
Referrer-Policy: no-referrer
Feature-Policy: microphone 'none'; geolocation 'none'
Expect-CT: max-age=0
CF-Cache-Status: DYNAMIC
Set-Cookie: __cf_bm=wkXkFwgBEGc6Ghwu.9PHLwFccvVaqOaV0zj8WyBdDf0-1685610351-0-AeqBrPqaw4CpOpFKrWxzWbN7139MTi3/194uecclD0smsP++N2TXfshkdaoVy4FtqyWm1JfEkkKH3joUoPoU2HY=; path=/; expires=Thu, 01-Jun-23 09:35:51 GMT; domain=.example.com; HttpOnly; Secure; SameSite=None
Server: cloudflare
CF-RAY: 7d064c15bf09f44a-BOM

where the content of this assetlinks.json is below and the SHA256 signature matches with the signature of the key I use for building the release apk.

[
    {
        "relation": ["delegate_permission/common.handle_all_urls"],
        "target": {
            "namespace": "android_app",
            "package_name": "com.example.com",
            "sha256_cert_fingerprints": ["SO:ME:FA:KE:SH:A2:56:5C:57:D7:22:D4:ED:A3:C4:97:23:A2:4E:B0:30:93:A5:57:39:98:B1:E0:3E:03:64:73"]
        }
    }
]

Running curl "https://digitalassetlinks.googleapis.com/v1/statements:list?source.web.site=https://example.com&relation=delegate_permission/common.handle_all_urls" returns the following json:

{
  "statements": [
    {
      "source": {
        "web": {
          "site": "https://example.com."
        }
      },
      "relation": "delegate_permission/common.handle_all_urls",
      "target": {
        "androidApp": {
          "packageName": "com.example.app",
          "certificate": {
            "sha256Fingerprint": "SO:ME:FA:KE:SH:A2:56:5C:57:D7:22:D4:ED:A3:C4:97:23:A2:4E:B0:30:93:A5:57:39:98:B1:E0:3E:03:64:73"
          }
        }
      }
    }
  ],
  "maxAge": "589172.377669267s"
}

I get the below output only when I run adb shell pm get-app-links --user cur com.example.app

    User 0:
      Verification link handling allowed: true
      Selection state:
        Disabled:
          example.com

I've also added a custom url scheme to the app manifest which works fine.

I am testing the app link on Android 13, Oneplus Nord 2, and an Android 12 device. I could not find any documentation where there was a discussion of a case with no output upon running adb shell pm get-app-links com.example.app.

Why is app link and verification not working on android

0 Answers0