Android 里的版本号

在android里有几个版本号经常会遇到，有的时候还要作特殊的处理。整理了一下一些特殊的关于版本的字段。这些都保留在文件系统的/system/build.prpo里，build.prpo理相当于平常在Windows下的注册表，这个文件这个文件内定义了系统初始(或永久)的一些参数属性、功能的开放等

用一下命令可以获得相关的信息。

adb shell getprop

可以获得他们的信息。

ro.build.display.id＝xxxx-user 4.1.2 xxxx eng.root.20130715.013357 release-keys
ro.build.description=xxxx-user 4.1.2 xxxx eng.root.20130715.013357 release-keys
ro.build.fingerprint=xxxx/xxxx/xxxx:4.1.2/xxxx/eng.root.20130715.013357:user/release-keys

1.ro.build.display.id 

ro.build.display.id在文件 packages/apps/Settings/src/com/android/settings/DeviceInfoSettings.java 中

setStringSummary(KEY_BUILD_NUMBER, Build.DISPLAY);

Build.DISPLAY即Build类中的 DISPLAY 变量，在文件frameworks/base/core/java/android/os/Build.java 中：

public static final String DISPLAY = getString("ro.build.display.id");

ro.build.display.id在文件build/tools/buildinfo.sh中：

echo "ro.build.display.id=$BUILD_DISPLAY_ID"

 而BUILD_DISPLAY_ID在文件build/core/Makefile中: 

 BUILD_DISPLAY_ID := $(BUILD_ID).$(BUILD_NUMBER)

其中 BUILD_ID在build/core/build_id.mk中赋值

BUILD_ID := OPENMASTER

BUILD_NUMBER 在 build/core/version_defaults.mk中赋值: 

BUILD_NUMBER := eng.$(USER).$(shell date +%Y%m%d.%H%M%S)

最后在生成的build.prop文件中。

2.ro.build.fingerprint

在BUILD_FINGERPRINT 在 build/core/version_defaults.mk中赋值: 

BUILD_FINGERPRINT := $(PRODUCT_BRAND)/$(TARGET_PRODUCT)/$(TARGET_DEVICE):$(PLATFORM_VERSION)/$(BUILD_ID)/$(BUILD_NUMBER):$(TARGET_BUILD_VARIANT)/$(BUILD_VERSION_TAGS)

3.ro.build.description

4.添加自己加的属性

比如需要添加一个ODM自己的版本号的属性 ODM_BUILD_ID

BUILDINFO_SH := build/tools/buildinfo.sh
$(INSTALLED_BUILD_PROP_TARGET): $(BUILDINFO_SH) $(INTERNAL_BUILD_ID_MAKEFILE) $(BUILD_SYSTEM)/version_defaults.mk $(wildcard $(TARGET_DEVICE_DIR)/system.prop)
	@echo Target buildinfo: $@
	@mkdir -p $(dir $@)
	$(hide) TARGET_BUILD_TYPE="$(TARGET_BUILD_VARIANT)" \
			TARGET_DEVICE="$(TARGET_DEVICE)" \
			PRODUCT_NAME="$(TARGET_PRODUCT)" \
			PRODUCT_BRAND="$(PRODUCT_BRAND)" \
			PRODUCT_DEFAULT_LANGUAGE="$(call default-locale-language,$(PRODUCT_LOCALES))" \
			PRODUCT_DEFAULT_REGION="$(call default-locale-region,$(PRODUCT_LOCALES))" \
			PRODUCT_DEFAULT_WIFI_CHANNELS="$(PRODUCT_DEFAULT_WIFI_CHANNELS)" \
			PRODUCT_MODEL="$(PRODUCT_MODEL)" \
			PRODUCT_MANUFACTURER="$(PRODUCT_MANUFACTURER)" \
			PRIVATE_BUILD_DESC="$(PRIVATE_BUILD_DESC)" \
			BUILD_ID="$(BUILD_ID)" \
			BUILD_DISPLAY_ID="$(BUILD_DISPLAY_ID)" \
			BUILD_NUMBER="$(BUILD_NUMBER)" \
			PLATFORM_VERSION="$(PLATFORM_VERSION)" \
			PLATFORM_SDK_VERSION="$(PLATFORM_SDK_VERSION)" \
			PLATFORM_VERSION_CODENAME="$(PLATFORM_VERSION_CODENAME)" \
			BUILD_VERSION_TAGS="$(BUILD_VERSION_TAGS)" \
			TARGET_BOOTLOADER_BOARD_NAME="$(TARGET_BOOTLOADER_BOARD_NAME)" \
			BUILD_FINGERPRINT="$(BUILD_FINGERPRINT)" \
			TARGET_BOARD_PLATFORM="$(TARGET_BOARD_PLATFORM)" \
			TARGET_CPU_ABI="$(TARGET_CPU_ABI)" \
			TARGET_CPU_ABI2="$(TARGET_CPU_ABI2)" \
			TARGET_AAPT_CHARACTERISTICS="$(TARGET_AAPT_CHARACTERISTICS)" \                                         ODM_BUILD_ID="$(ODM_BUILD_ID)" \
	        bash $(BUILDINFO_SH) > $@
	$(hide) if [ -f $(TARGET_DEVICE_DIR)/system.prop ]; then \
	          cat $(TARGET_DEVICE_DIR)/system.prop >> $@; \
	        fi
	$(if $(ADDITIONAL_BUILD_PROPERTIES), \
		$(hide) echo >> $@; \
		        echo "#" >> $@; \
		        echo "# ADDITIONAL_BUILD_PROPERTIES" >> $@; \
		        echo "#" >> $@; )
	$(hide) $(foreach line,$(ADDITIONAL_BUILD_PROPERTIES), \
		echo "$(line)" >> $@;)
	$(hide) build/tools/post_process_props.py $@

build_desc :=

另外还有部分常用到的定义如下：

echo "# begin build properties"
echo "# autogenerated by buildinfo.sh"

echo "ro.build.id=$BUILD_ID"
echo "ro.build.display.id=$BUILD_DISPLAY_ID"
echo "ro.build.version.incremental=$BUILD_NUMBER"
echo "ro.build.version.sdk=$PLATFORM_SDK_VERSION"
echo "ro.build.version.codename=$PLATFORM_VERSION_CODENAME"
echo "ro.build.version.release=$PLATFORM_VERSION"
echo "ro.build.date=`date`"
echo "ro.build.date.utc=`date +%s`"
echo "ro.build.type=$TARGET_BUILD_TYPE"
echo "ro.build.user=$USER"
echo "ro.build.host=`hostname`"
echo "ro.build.tags=$BUILD_VERSION_TAGS"
echo "ro.product.model=$PRODUCT_MODEL"
echo "ro.product.brand=$PRODUCT_BRAND"
echo "ro.product.name=$PRODUCT_NAME"
echo "ro.product.device=$TARGET_DEVICE"
echo "ro.product.board=$TARGET_BOOTLOADER_BOARD_NAME"
echo "ro.product.cpu.abi=$TARGET_CPU_ABI"