android添加新产品定义

原文网址：http://www.kandroid.org/online-pdk/guide/build_new_device.html

配置一个新产品

详细描述

以下步骤描述如何为一个新的移动设备配置makefiles以让产品能够运行Android系统。

1. 在vendor/目录下创建一个公司目录

mkdir vendor/<company_name>

2. 在步骤1中你创建的公司目录下创建一个products目录

mkdir vendor/<company_name>/products/

3. 创建一个特定产品的makefile，叫做vendor/<company_name>/products/<first_product_name>.mk，它至少包含如下代码：

$(call inherit-product, $(SRC_TARGET_DIR)/product/generic.mk)
  #
  # Overrides
  PRODUCT_NAME := <first_product_name>
  PRODUCT_DEVICE := <board_name>

4. 为一个特定产品添加变量，可以被添加的变量定义在Product Definition文件中。

5. 在products目录中，创建一个AndroidProducts.mk文件，这个文件指向一个产品的makefiles，它主要负责寻找所有的产品。

  #
  # This file should set PRODUCT_MAKEFILES to a list of product makefiles
  # to expose to the build system.  LOCAL_DIR will already be set to
  # the directory containing this file. 
  #
  # This file may not rely on the value of any variable other than
  # LOCAL_DIR; do not use any conditionals, and do not look up the
  # value of any variable that isn't set in this file or in a file that
  # it includes.
  #
  
  PRODUCT_MAKEFILES := \
    $(LOCAL_DIR)/first_product_name.mk \

6. 在你的公司目录下创建一个特定板子目录，它要匹配PRODUCT_DEVICE变量，<board_name>将会引用上面特定产品的makefile。任何使用该板子的产品都将包含一个makefile。

mkdir vendor/<company_name>/<board_name>

7. 在前面一步创建的目录中创建一个BoardConfig.mk文件(vendor/<company_name>/<board_name>)

  # These definitions override the defaults in config/config.make for <board_name>
  #
  # TARGET_NO_BOOTLOADER := false
  # TARGET_HARDWARE_3D := false 
  #
  TARGET_USE_GENERIC_AUDIO := true

8. 如果你希望修改系统属性，在<board_name>目录中创建一个system.prop文件(vendor/<company_name>/<board_name>)。

  # system.prop for 
  # This overrides settings in the products/generic/system.prop file
  #
  # rild.libpath=/system/lib/libreference-ril.so
  # rild.libargs=-d /dev/ttyS0

9. 在products/AndroidProducts.mk中添加指向<second_product_name>.mk文件

  PRODUCT_MAKEFILES := \
    $(LOCAL_DIR)/first_product_name.mk \
    $(LOCAL_DIR)/second_product_name.mk

10. 在vendor/<company_name>/<board_name>的Android.mk文件中至少包含如下代码：

  # make file for new hardware  from 
  #
  LOCAL_PATH := $(call my-dir)
  #
  # this is here to use the pre-built kernel
  ifeq ($(TARGET_PREBUILT_KERNEL),)
  TARGET_PREBUILT_KERNEL := $(LOCAL_PATH)/kernel
  endif
  #
  file := $(INSTALLED_KERNEL_TARGET)
  ALL_PREBUILT += $(file)
  $(file): $(TARGET_PREBUILT_KERNEL) | $(ACP)
		$(transform-prebuilt-to-target)
  #
  # no boot loader, so we don't need any of that stuff..  
  #
  LOCAL_PATH := vendor/<company_name>/<board_name>
  #
  include $(CLEAR_VARS)
  #
  # include more board specific stuff here? Such as Audio parameters.      
  #

11. 为同种板子创建第二个产品，创建第二个特定的产品的makefile叫做vendor/company_name/products/<second_product_name>.mk，包含如下内容：

  $(call inherit-product, $(SRC_TARGET_DIR)/product/generic.mk)
  #
  # Overrides
  PRODUCT_NAME := <second_product_name>
  PRODUCT_DEVICE := <board_name>

到了这里，你应该有两个新产品，叫做<first_product_name>和<second_product_name>为了验证一个产品是否配置正确(例如<first_product_name>)，执行如下命令：

  . build/envsetup.sh
  make PRODUCT-<first_product_name>-user

你应该能找到新版本的二进制文件位于/out/target/product/<board_name>。

新产品文件树

以下文件树说明在你的系统上照以上步骤完成应该有的。

• <company_name>
  • <board_name>
    • Android.mk
    • product_config.mk
    • system.prop
  • products
    • AndroidProducts.mk
    • <first_product_name>.mk
    • <second_product_name>.mk

产品定义文件

特殊产品变量定义在产品定义文件中，一个产品定义文件可以继承其它的产品定义文件，从而减少代码复制和便于维护。

在产品定义文件中包含的变量包括：

Parameter	Description	Example
PRODUCT_NAME	End-user-visible name for the overall product. Appears in the "About the phone" info.
PRODUCT_MODEL	End-user-visible name for the end product
PRODUCT_LOCALES	A space-separated list of two-letter language code, two-letter country code pairs that describe several settings for the user, such as the UI language and time, date and currency formatting. The first locale listed in PRODUCT_LOCALES is is used if the locale has never been set before.	en_GB de_DE es_ES fr_CA
PRODUCT_PACKAGES	Lists the APKs to install.	Calendar Contacts
PRODUCT_DEVICE	Name of the industrial design	dream
PRODUCT_MANUFACTURER	Name of the manufacturer	acme
PRODUCT_BRAND	The brand (e.g., carrier) the software is customized for, if any
PRODUCT_PROPERTY_OVERRIDES	List of property assignments in the format "key=value"
PRODUCT_COPY_FILES	List of words likesource_path:destination_path. The file at the source path should be copied to the destination path when building this product. The rules for the copy steps are defined in config/Makefile
PRODUCT_OTA_PUBLIC_KEYS	List of OTA public keys for the product
PRODUCT_POLICY	Indicate which policy this product should use
PRODUCT_PACKAGE_OVERLAYS	Indicate whether to use default resources or add any product specific overlays	vendor/acme/overlay
PRODUCT_CONTRIBUTORS_FILE	HTML file containing the contributors to the project.
PRODUCT_TAGS	list of space-separated words for a given product

下面的片段描述一个典型产品定义文件。

$(call inherit-product, build/target/product/generic.mk)

#Overrides
PRODUCT_NAME := MyDevice
PRODUCT_MANUFACTURER := acme
PRODUCT_BRAND := acme_us
PRODUCT_LOCALES := en_GB es_ES fr_FR
PRODUCT_PACKAGE_OVERLAYS := vendor/acme/overlay