Android AppFunctions are indexed/enabled on device but Gemini cannot resolve custom function metadata

[lates-codrin]

Description of the bug:

Description of the bug

I integrated Android AppFunctions in a third-party app and verified that the platform indexes and enables all functions. However, Gemini does not discover or execute these functions and logs metadata resolution failures.

Environment

• Device: Samsung Galaxy A34 (SM-A346B)
• Android: 16 (SDK 36)
• App package: ro.safetycentre.app
• Build tools: AGP 8.9.1, Gradle 8.14.3
• Language/tooling: Kotlin 2.1.10, KSP 2.1.10-1.0.31
• Libraries:
  • androidx.appfunctions:appfunctions:1.0.0-alpha07
  • androidx.appfunctions:appfunctions-service:1.0.0-alpha07
  • androidx.appfunctions:appfunctions-compiler:1.0.0-alpha07

What was validated already

• KSP aggregation is enabled: appfunctions:aggregateAppFunctions=true
• APK includes required assets:
  • assets/app_functions.xml
  • assets/app_functions_v2.xml
  • assets/app_functions_schema.xsd
• Manifest contains merged AppFunction services/properties.
• Device has com.android.extensions.appfunctions library.
• dumpsys app_function shows all six functions with runtime metadata and enabled: [1].
• App-side diagnostics report 6/6 functions indexed.

Minimal reproduction

1. Build and install app on Android 16 device.
2. Launch app and wait for AppFunction registration/indexing.
3. Confirm indexed state via dumpsys app_function and app logs.
4. Attempt discovery/execution through Gemini.

Actual vs expected behavior:

Actual vs expected behavior

Actual behavior

• Gemini does not discover/execute the custom app functions.
• Logs repeatedly show: D/AppFunctions: Unable to resolve AppFunctionMetadata.

Expected behavior

• Once functions are indexed and enabled by the Android AppFunctions platform, Gemini should discover and be able to execute them, or provide a clear compatibility reason if custom schemas are unsupported.

Any other information you'd like to share?

Any other information you'd like to share?

• This may be a support/compatibility question rather than a pure runtime bug.
• If custom app-defined schemas are not currently supported in Gemini, please confirm current limitations and any roadmap for support.
• Google Issue Tracker ticket (Android): https://issuetracker.google.com/issues/490650368

[CatalinPrata]

Hello, I have the exact same issue as above, any hints about what's going on?

[lates-codrin]

Hello, I have the exact same issue as above, any hints about what's going on?

Salut, am deschis thread si pe issuetracker, am vazut ca au schimbat din 1.0.0-alpha07 in 1.0.0-alpha08 recent dar nu stiu daca e related
https://issuetracker.google.com/issues/490650368

[CatalinPrata]

@lates-codrin I am actually using 1.0.0-alpha08 already and getting that :)

[ayushdebnath30016-spec]

/assign

[manueltarouca]

Following, having the same issue

[keyboardsurfer]

Thanks for your interest in AppFunctions. The API is currently marked as experimental. You can read the recently published FAQ on the developer guidance page for answers on questions in this thread.