在文件 `packages/apps/Settings/src/com/android/settings/DeviceInfoSettings.java` 中
setStringSummary("build_number", Build.DISPLAY);
指定了设置--关于设备--版本号。
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)
所以在版本号中会出现编译时间的字段。
ro.build.display.id编译后保持在system下的build.prop文件
最终修改build/core/Makefile
# BUILD_DISPLAY_ID is shown under Settings -> About Phone ifeq ($(TARGET_BUILD_VARIANT),user) # User builds should show: # release build number or branch.buld_number non-release builds # Dev. branches should have DISPLAY_BUILD_NUMBER set ifeq (true,$(DISPLAY_BUILD_NUMBER)) BUILD_DISPLAY_ID := $(BUILD_DESC) else BUILD_DISPLAY_ID := $(BUILD_DESC) endif else # Non-user builds should show detailed build information BUILD_DISPLAY_ID := $(BUILD_DESC) endif
标签:core,user,number,BUILD,ID,Build,DISPLAY,build From: https://www.cnblogs.com/wanglongjiang/p/18211273