B10: Exercise: Create your own product

Add product

Create a new device tree directory

mkdir -p device/mycompany
cd device/mycompany

In this directory create a AndroidProducts.mk file with the content

PRODUCT_MAKEFILES := \
    aosp_my_x86_64:$(LOCAL_DIR)/aosp_my_x86_64.mk

COMMON_LUNCH_CHOICES := \
    aosp_my_x86_64-trunk_staging-userdebug

Create a aosp_my_x86_64.mk file with the content

# Base this product on "aosp_cf_x86_64_auto"
$(call inherit-product, device/google/cuttlefish/vsoc_x86_64_only/auto/aosp_cf.mk)

PRODUCT_MANUFACTURER := MyCompany
PRODUCT_NAME := aosp_my_x86_64
PRODUCT_MODEL := My Device Model
# This must match a existing BoardConfig.mk within the boards/$(PRODUCT_DEVICE) subfolder.
PRODUCT_DEVICE := my_aosp_auto

Create a BoardConfig.mk within the board\my_aosp_auto subfolder, with the content:

-include device/google/cuttlefish/vsoc_x86_64_only/BoardConfig.mk

Now you can already build your new product.

Execute lunch. Your new device should appear.

Select and build it with:

lunch aosp_my_x86_64-trunk_staging-userdebug
m -j24

After building it, run the cuttlefish emulator again.

Check that your new product is running with

adb shell getprop | grep model
adb shell getprop | grep aosp_my

Check also the Settings application. Under System -> About your Model name should appear.

Add a system property

To add a custom system property to our product, add the following code to your product makefile called aosp_my_x86_64.mk:

PRODUCT_PRODUCT_PROPERTIES += \
     ro.mycompany.test=hello

Rebuild, rerun and test with

adb shell getprop ro.mycompany.test

Add a prebuilt application

In the directory device/mycompany/, next to aosp_my_x86_64.mk, file create a file called Android.bp with the content

android_app_import {
    name: "MyApp",
    presigned: true,
    preprocessed: true,
    apk: "app-debug.apk",
}

Upload the app-debug.apk into the same directory.

Add the following code to your product makefile called aosp_my_x86_64.mk:

PRODUCT_PACKAGES += \
    MyApp

Rebuild, rerun and test with

adb shell find /system -name MyApp.apk
adb shell pm dump de.inovex.aosptraining | less

The SYSTEM flag should be set now and the apk location on the system partition.