前言
当前环境：
1、Ubuntu16.04，已经安装好了各种依赖
2、Android代码版本，android-9.0.0_r3
一、导入环境
源码根目录输入：
source build/envsetup.sh
输出：
including device/generic/car/vendorsetup.sh
including device/generic/mini-emulator-arm64/vendorsetup.sh
including device/generic/mini-emulator-armv7-a-neon/vendorsetup.sh
including device/generic/mini-emulator-mips64/vendorsetup.sh
including device/generic/mini-emulator-mips/vendorsetup.sh
including device/generic/mini-emulator-x86_64/vendorsetup.sh
including device/generic/mini-emulator-x86/vendorsetup.sh
including device/generic/uml/vendorsetup.sh
including device/google/cuttlefish/vendorsetup.sh
including device/google/marlin/vendorsetup.sh
including device/google/muskie/vendorsetup.sh
including device/google/taimen/vendorsetup.sh
including device/linaro/hikey/vendorsetup.sh
including sdk/bash_completion/adb.bash
二、配置编译信息
输入：
lunch
输入可以选择的版本
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_car_arm-userdebug
8. aosp_car_arm64-userdebug
9. aosp_car_x86-userdebug
10. aosp_car_x86_64-userdebug
11. mini_emulator_arm64-userdebug
12. m_e_arm-userdebug
13. m_e_mips64-eng
14. m_e_mips-userdebug
15. mini_emulator_x86_64-userdebug
16. mini_emulator_x86-userdebug
17. uml-userdebug
18. aosp_cf_x86_auto-userdebug
19. aosp_cf_x86_phone-userdebug
20. aosp_cf_x86_tablet-userdebug
21. aosp_cf_x86_tablet_3g-userdebug
22. aosp_cf_x86_tv-userdebug
23. aosp_cf_x86_wear-userdebug
24. aosp_cf_x86_64_auto-userdebug
25. aosp_cf_x86_64_phone-userdebug
26. aosp_cf_x86_64_tablet-userdebug
27. aosp_cf_x86_64_tablet_3g-userdebug
28. aosp_cf_x86_64_tv-userdebug
29. aosp_cf_x86_64_wear-userdebug
30. cf_x86_auto-userdebug
31. cf_x86_phone-userdebug
32. cf_x86_tablet-userdebug
33. cf_x86_tablet_3g-userdebug
34. cf_x86_tv-userdebug
35. cf_x86_wear-userdebug
36. cf_x86_64_auto-userdebug
37. cf_x86_64_phone-userdebug
38. cf_x86_64_tablet-userdebug
39. cf_x86_64_tablet_3g-userdebug
40. cf_x86_64_tv-userdebug
41. cf_x86_64_wear-userdebug
42. aosp_marlin-userdebug
43. aosp_marlin_svelte-userdebug
44. aosp_sailfish-userdebug
45. aosp_walleye-userdebug
46. aosp_walleye_test-userdebug
47. aosp_taimen-userdebug
48. hikey-userdebug
49. hikey64_only-userdebug
50. hikey960-userdebug
Which would you like? [aosp_arm-eng] #这里输入对应数字并回车
为了方便可以用一下方式，以aosp_arm64-eng为例：
lunch aosp_arm64-eng
# 或者
lunch 2
三、编译代码
输入：
make -j4
# -j4是用4个核心数同时编译的意思，可不加，也可以根据机器实际改变数字
在不出错的情况下，漫长的等待，出现下面情况表示编译成功
#### build completed successfully (01:23:12 (hh:mm:ss)) ####
四、启动Android虚拟机
在编译成功后，根目录输入：
emulator
启动成功
启动成功
五、错误记录
错误一
[1/1] out/soong/.minibootstrap/minibp out/soong/.bootstrap/build.ninja
FAILED: out/soong/.bootstrap/build.ninja
out/soong/.minibootstrap/minibp -t -l out/.module_paths/Android.bp.list -b out/soong -n out -d out/soong/.bootstrap/build.ninja.d -o out/soong/.bootstrap/build.ninja Android.bp
internal error: could not open symlink hardware/qcom/sm8150/Android.bp; its target (data/ipacfg-mgr/os_pickup.bp) cannot be opened
internal error: could not open symlink hardware/qcom/sdm845/Android.bp; its target (data/ipacfg-mgr/os_pickup.bp) cannot be opened
ninja: build stopped: subcommand failed.
11:02:14 soong minibootstrap failed with: exit status 1
#### failed to build some targets (13 seconds)
解：查了一下，对应两个bp文件都是空的，直接删除解决。
错误二
[1/1] out/soong/.minibootstrap/minibp out/soong/.bootstrap/build.ninja
[55/56] glob prebuilts/ndk/stl.bp
[77/77] out/soong/.bootstrap/bin/soong_build out/soong/build.ninja
out/build-aosp_arm64-cleanspec.ninja is missing, regenerating...
out/build-aosp_arm64.ninja is missing, regenerating...
[382/936] including hardware/qcom/sdm845/Android.mk ...
hardware/qcom/power/Android.mk:3: error: hardware/qcom/sdm845/Android.mk: No such file or directory
11:10:31 ckati failed with: exit status 1
#### failed to build some targets (01:19 (mm:ss))
解：查了一下sdm845目录下只有一个空的mk，删除sdm845目录解决。
