Creating Build.fingerprint On Android

Android documentation refers to Build.FINGERPRINT as a way to uniquely identify the build. I'd like to know how this property is generated. I'm compiling whole framework on my boar

Solution 1:

See here for an overview of Build.FINGERPRINT:

android.os.Build.FINGERPRINT: A string that uniquely identifies this build. It SHOULD be reasonably human-readable. It MUST follow this template:

$(BRAND)/$(PRODUCT)/$(DEVICE)/$(BOARD):$(VERSION.RELEASE)/$(ID)/$(VERSION.INCREMENTAL):$(TYPE)/$(TAGS)

For example: acme/mydevice/generic/generic:2.1-update1/ERC77/3359:userdebug/test-keys

The fingerprint MUST NOT include spaces. If other fields included in the template above have spaces, they SHOULD be replaced with the ASCII underscore ("_") character in the fingerprint.

I do know that you do need to have your platform certified (which yes, includes providing your fingerprint so that Market can display only those apps that your device is able to run) before being licensed to use the Market.

Solution 2:

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

Solution 3:

Note that the recent AOSP remove the $(BOARD)

Now it looks like this: $(PRODUCT_BRAND)/$(TARGET_PRODUCT)/$(TARGET_DEVICE):$(PLATFORM_VERSION)/$(BUILD_ID)/$(BF_BUILD_NUMBER):$(TARGET_BUILD_VARIANT)/$(BUILD_VERSION_TAGS)

https://cs.android.com/android/platform/superproject/+/master:build/make/core/sysprop.mk;l=170?q=BUILD_FINGERPRINT%20:%3D%20$

build/make/core/sysprop.mk

# BUILD_FINGERPRINT is used used to uniquely identify the combined build and# product; used by the OTA server.ifeq (,$(strip$(BUILD_FINGERPRINT)))
  ifeq ($(strip$(HAS_BUILD_NUMBER)),false)
    BF_BUILD_NUMBER := $(BUILD_USERNAME)$$($(DATE_FROM_FILE) +%m%d%H%M)
  else
    BF_BUILD_NUMBER := $(file <$(BUILD_NUMBER_FILE))endif
  BUILD_FINGERPRINT := $(PRODUCT_BRAND)/$(TARGET_PRODUCT)/$(TARGET_DEVICE):$(PLATFORM_VERSION)/$(BUILD_ID)/$(BF_BUILD_NUMBER):$(TARGET_BUILD_VARIANT)/$(BUILD_VERSION_TAGS)endif

So a correct fingerprint is like:

Pixel

google/shamu/shamu:5.1.1/LMY48Y/2364368:user/release-keys

Samsung S9

samsung/starqlteue/starqlteue:10/QP1A.190711.020/G960U1UEU9FUE4:user/release-keys

Samsung S10

samsung/beyond2qlteue/beyond2q:11/RP1A.200720.012/G975U1UEU5GUE4:user/release-keys