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Commit b808bd7d authored by Yifan Hong's avatar Yifan Hong
Browse files

health 1.0: add helper library for -impl 

Now that libhealthd is no longer recognized as a HAL_STATIC_LIBRARY,
vendors must define their own android.hardware.health@1.0-impl module.
Add a helper and README.md for them to explain this transition.

Test: builds
Bug: 127677771
Change-Id: I65c162e7b5caed93c39a4a1cb6a2893fbb25724b
parent 891220af

health/1.0/default/Android.bp

+13 −3
Original line number Diff line number Diff line
@@ -18,10 +18,9 @@ cc_library_static { 


}



cc_library_shared {

    name: "android.hardware.health@1.0-impl",

cc_library_static {

    name: "android.hardware.health@1.0-impl-helper",

    vendor: true,

    relative_install_path: "hw",

    srcs: ["Health.cpp"],



    header_libs: [
@@ -39,6 +38,17 @@ cc_library_shared { 


    static_libs: [

        "android.hardware.health@1.0-convert",

    ],

}



cc_library_shared {

    name: "android.hardware.health@1.0-impl",

    vendor: true,

    relative_install_path: "hw",



    static_libs: [

        "android.hardware.health@1.0-impl-helper",

        "android.hardware.health@1.0-convert",

        "libhealthd.default",

    ],

}

health/1.0/default/README.md

0 → 100644
+66 −0
Original line number Diff line number Diff line 
# Implement the 2.1 HAL instead!



It is strongly recommended that you implement the 2.1 HAL directly. See

`hardware/interfaces/health/2.1/README.md` for more details.



# Implement Health 1.0 HAL



1. Install common binderized service. The binderized service `dlopen()`s

   passthrough implementations on the device, so there is no need to write

   your own.



    ```mk

    # Install default binderized implementation to vendor.

    PRODUCT_PACKAGES += android.hardware.health@1.0-service

    ```



1. Add proper VINTF manifest entry to your device manifest. Example:



    ```xml

    <hal format="hidl">

        <name>android.hardware.health</name>

        <transport>hwbinder</transport>

        <version>1.0</version>

        <interface>

            <name>IHealth</name>

            <instance>default</instance>

        </interface>

    </hal>

    ```



1. Install the proper passthrough implemetation.



    1. If you want to use the default implementation (with default `libhealthd`),

       add the following to `device.mk`:



        ```mk

        PRODUCT_PACKAGES += \

            android.hardware.health@1.0-impl

        ```



    1. Otherwise, if you have a customized `libhealthd.<board>`:



        1. Define your passthrough implementation. Example (replace `<device>`

           and `<board>` accordingly):



            ```bp

            cc_library_shared {

                name: "android.hardware.health@1.0-impl-<device>",

                vendor: true,

                relative_install_path: "hw",



                static_libs: [

                    "android.hardware.health@1.0-impl-helper",

                    "android.hardware.health@1.0-convert",

                    "libhealthd.<board>",

                ],

            }

            ```



        1. Add to `device.mk`.



            ```

            PRODUCT_PACKAGES += android.hardware.health@1.0-impl-<device>

            ```



        1. Define appropriate SELinux permissions.