nexus 5是谷歌的亲儿子,而android的源码是开源的,那如果我有一个nexus 5手机,为何不自己为nexus 5编译软件呢?
开搞,本文假定已经有android 5.1的源码并已经配置好开发环境,如果没有则参考google官方文档下载源码并配置开发环境。参考https://source.android.com/source/initializing.html以及https://source.android.com/source/downloading.html。注意,这个过程可能需要访问外国网站,作为程序员的我们,访问外国网站不是小菜一碟。
另外你需要知道AOSP,AOSP即Android Open Source Project 汉语意思是:谷歌开放源代码项目。我们通过Google官方下载的源代码,就是AOSP的代码,其中是不包含Google开发的那些个应用的,各个厂商拿到的也是这个版本,在这个版本的基础上进行修改。而Google发布的工厂固件则是包含全套Google服务的。厂商如果想安装Google服务,就需要过Google的那一套认证,比较麻烦,而且价格不菲,鉴于Google在国内的尴尬地位,国内很多厂商都没有过这个认证。所以,我们自己编译的出来的软件和nexus 5官方放出来的刷机包还是有区别的。
. build/envsetup.sh
lunch
You're building on Linux
Lunch menu... pick a combo:
1. aosp_arm-eng
2. aosp_arm64-eng
3. aosp_mips-eng
4. aosp_mips64-eng
5. aosp_x86-eng
6. aosp_x86_64-eng
7. aosp_shamu-userdebug
8. aosp_manta-userdebug
9. full_fugu-userdebug
10. aosp_fugu-userdebug
11. aosp_grouper-userdebug
12. aosp_tilapia-userdebug
13. aosp_deb-userdebug
14. aosp_flo-userdebug
15. aosp_mako-userdebug
16. aosp_hammerhead-userdebug
17. aosp_flounder-userdebug
18. mini_emulator_x86_64-userdebug
19. mini_emulator_arm-userdebug
20. mini_emulator_x86-userdebug
21. mini_emulator_mips-userdebug
22. mini_emulator_arm64-userdebug
Device | Code name | Build configuration |
---|---|---|
Nexus 6 | shamu | aosp_shamu-userdebug |
Nexus Player | fugu | aosp_fugu-userdebug |
Nexus 9 | volantis (flounder) | aosp_flounder-userdebug |
Nexus 5 (GSM/LTE) | hammerhead | aosp_hammerhead-userdebug |
Nexus 7 (Wi-Fi) | razor (flo) | aosp_flo-userdebug |
Nexus 7 (Mobile) | razorg (deb) | aosp_deb-userdebug |
Nexus 10 | mantaray (manta) | full_manta-userdebug |
Nexus 4 | occam (mako) | full_mako-userdebug |
Nexus 7 (Wi-Fi) | nakasi (grouper) | full_grouper-userdebug |
Nexus 7 (Mobile) | nakasig (tilapia) | full_tilapia-userdebug |
Galaxy Nexus (GSM/HSPA+) | yakju (maguro) | full_maguro-userdebug |
Galaxy Nexus (Verizon) | mysid (toro) | aosp_toro-userdebug |
Galaxy Nexus (Experimental) | mysidspr (toroplus) | aosp_toroplus-userdebug |
PandaBoard (Archived) | panda | aosp_panda-userdebug |
Motorola Xoom (U.S. Wi-Fi) | wingray | full_wingray-userdebug |
Nexus S | soju (crespo) | full_crespo-userdebug |
Nexus S 4G | sojus (crespo4g) | full_crespo4g-userdebug |
user | limited access; suited for production |
userdebug | like “user” but with root access and debuggability; preferred for debugging |
eng | development configuration with additional debugging tools |
选择aosp_hammerhead-userdebug之后,会有下面的确认信息:
============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=5.0.50.50.50.50
TARGET_PRODUCT=aosp_hammerhead
TARGET_BUILD_VARIANT=userdebug
TARGET_BUILD_TYPE=release
TARGET_BUILD_APPS=
TARGET_ARCH=arm
TARGET_ARCH_VARIANT=armv7-a-neon
TARGET_CPU_VARIANT=krait
TARGET_2ND_ARCH=
TARGET_2ND_ARCH_VARIANT=
TARGET_2ND_CPU_VARIANT=
HOST_ARCH=x86_64
HOST_OS=linux
HOST_OS_EXTRA=Linux-3.13.0-37-generic-x86_64-with-Ubuntu-14.10-utopic
HOST_BUILD_TYPE=release
BUILD_ID=AOSP
OUT_DIR=out
============================================
接下来需要在Android官网下载 Nexus5所需要的驱动:https://developers.google.com/android/nexus/drivers#hammerheadlrx22c
下载完成后,解压出来是三个.sh文件,放到Android源码目录下面,然后执行.会将相关驱动放到vender目录下面.
make -j8
如果没有出错的话,在经过漫长的时间之后,编译成功:
Nexus5关机状态下,长按音量下+电源,即可进入recovery模式, 然后在源码根目录下执行下面命令:
fastboot -w flashall
刷机成功后会自动重启
~/ fastboot -w flashall
target reported max download size of 1073741824 bytes
Creating filesystem with parameters:
Size: 13725835264
Block size: 4096
Blocks per group: 32768
Inodes per group: 8144
Inode size: 256
Journal blocks: 32768
Label:
Blocks: 3351034
Block groups: 103
Reserved block group size: 823
Created filesystem with 11/838832 inodes and 93654/3351034 blocks
Creating filesystem with parameters:
Size: 734003200
Block size: 4096
Blocks per group: 32768
Inodes per group: 7472
Inode size: 256
Journal blocks: 2800
Label:
Blocks: 179200
Block groups: 6
Reserved block group size: 47
Created filesystem with 11/44832 inodes and 5813/179200 blocks
--------------------------------------------
Bootloader Version...: HHZ12d
Baseband Version.....: M8974A-2.0.50.2.22
Serial Number........: 08ade1a513dc087b
--------------------------------------------
checking product...
OKAY [ 0.100s]
sending 'boot' (8950 KB)...
OKAY [ 0.500s]
writing 'boot'...
OKAY [ 0.784s]
sending 'recovery' (9672 KB)...
OKAY [ 0.556s]
writing 'recovery'...
OKAY [ 0.814s]
erasing 'system'...
OKAY [ 1.166s]
sending 'system' (328187 KB)...
OKAY [ 10.501s]
writing 'system'...
OKAY [ 23.623s]
erasing 'userdata'...
OKAY [ 14.657s]
sending 'userdata' (137318 KB)...
OKAY [ 4.520s]
writing 'userdata'...
OKAY [ 9.776s]
erasing 'cache'...
OKAY [ 0.618s]
sending 'cache' (13348 KB)...
OKAY [ 0.630s]
writing 'cache'...
OKAY [ 1.070s]
rebooting...
finished. total time: 70.095s