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.

   # Install default binderized implementation to vendor.
   PRODUCT_PACKAGES += android.hardware.health@1.0-service
   

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

   <hal format="hidl">
       <name>android.hardware.health</name>
       <transport>hwbinder</transport>
       <version>1.0</version>
       <interface>
           <name>IHealth</name>
           <instance>default</instance>
       </interface>
   </hal>
   

3. Install the proper passthrough implemetation.

   1. If you want to use the default implementation (with default libhealthd), add the following to device.mk:

      PRODUCT_PACKAGES += \
          android.hardware.health@1.0-impl
      

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

      1. Define your passthrough implementation. Example (replace <device> and <board> accordingly):

         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>",
             ],
         }
         

      2. Add to device.mk.

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

      3. Define appropriate SELinux permissions.