How to create stable AIDL interface in Android 11 release version

[Yue Xu]

Hi, 

I'm trying to create a stable AIDL interface for a new service from scratch following this documentation: https://source.android.com/devices/architecture/aidl/stable-aidl.

I'm working in an Android 11 release checkout.

I have something like this in Android.bp:

```

aidl_interface {

   name: "foo",

   stability: "vintf",

   srcs: [

      "IFoo.aidl",

   ],

}

```

And I want to freeze the API to create a first version. If I run 'foo-freeze-api', I have this error: `module "foo_interface": versions: must be set \(need to be frozen\) when "unstable" is false and PLATFORM_VERSION_CODENAME is REL`. (This is actually a test case from 'aidl_test.go'.) But the problem is I don't have any frozen versions yet and I'm trying to create one. And I have `PLATFORM_VERSION_CODENAME=REL`. Why the restriction? Does this mean I can't use stable AIDL in release? How can I make this work?

Thanks.

[Stefan Wysocki]

Hello,

It is actually not documented that much in Android 11, but it has changed in master.

You need to add the "owner" field to make "m foo-freeze-api" and "m foo-update-api" work.

```

aidl_interface {

   name: "foo",

   stability: "vintf",

   owner: "EXAMPLE_OEM",

   srcs: [

      "IFoo.aidl",

   ],

}

```

[Md Raj bd]

Ok

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