/android_vendor_interface_example

Primary LanguageC++

This is Android HIDL and AIDL interface example with default c++ implementation.

Tested on Android 12 with TARGET_PRODUCT=sdk_car_x86_64

To test HIDL:

  1. Clone project into some directory like vendor/xen/epam

  2. Add to your device descriptor make file (in my case it will be device/generic/car/emulator/aosp_car_emulator.mk) : PRODUCT_PACKAGES += epam.virt@1.0-service and BOARD_VENDOR_SEPOLICY_DIRS += vendor/xen/epam/interfaces/virt/1.0/default/sepolicy/vendor

  3. Continue to build.

On success you will get something like:

12-23 23:18:16.803     0     0 I init    : Parsing file /vendor/etc/init/epam.virt@1.0-service.rc...
12-23 23:18:25.841     0     0 I init    : starting service 'epam.virt-1-0'...
12-23 23:18:25.946   420   420 I HidlServiceManagement: Registered epam.virt@1.0::IVirt/default
12-23 23:18:25.946   420   420 I HidlServiceManagement: Removing namespace from process name epam.virt@1.0-service to virt@1.0-service.
12-23 23:18:25.946   420   420 I epam.virt@1.0-service: IVirt registered !

You could also use lshal | epam

Note: HIDL HAL/service deprecated since Android 12, use AIDL.

To test AIDL:

  1. Clone project into some directory like vendor/xen/epam

  2. Add to your device descriptor make file (in my case it will be device/generic/car/emulator/aosp_car_emulator.mk) : PRODUCT_PACKAGES += epam.virt-service and BOARD_VENDOR_SEPOLICY_DIRS += vendor/xen/epam/aidl/default/sepolicy/vendor

  3. Continue to build.

On sucess you will get something like:

12-24 01:32:30.188     0     0 I init    : starting service 'vendor.epam_virt'...
12-24 01:32:30.165   170   170 I servicemanager: Found epam.virt.IVirt/default in device VINTF manifest.
12-24 01:32:30.165   377   377 I epam.virt-service: AIDL Virt service started !

To test rpc: logcat -c | service call epam.virt.IVirt/default 1 && logcat | grep epam on sucess:

Result: Parcel(NULL)
12-24 03:24:45.987   384   384 I epam.virt-service: AIDL Virt::init()

NOTE: AIDL was generated using:

  1. hidl2aidl -o vendor/xen/epam/aidl/ -r epam:vendor/xen/epam/interfaces/ -v epam.virt@1.0
  2. m epam.virt-freeze-api
  3. mkdir vendor/xen/epam/aidl/aidl_api/epam.virt/1
  4. manual insertion of the hash form freeze to vendor/xen/epam/aidl/aidl_api/epam.virt/1/.hash
  5. m epam.virt-update-api