解决方法：
在 import sys下面添加

import ssl
ssl._create_default_https_context = ssl._create_unverified_context
repo: command not found
解决方法：
echo 'export PATH=$PATH:$HOME/bin' >> ~/.bashrc
export PATH=$PATH:$HOME/bin
repo init -u https://aosp.tuna.tsinghua.edu.cn/platform/manifest

Downloading Repo source from https://gerrit-google.tuna.tsinghua.edu.cn/git-repo

fatal: Cannot get https://gerrit-google.tuna.tsinghua.edu.cn/git-repo/clone.bundle

fatal: error [Errno 0] Error

fatal: cloning the git-repo repository failed, will remove '.repo/repo'
repo的运行过程中会尝试访问官方的git源更新自己，如果想使用tuna的镜像源进行更新，可以将如下内容>复制到你的~/.bashrc里
export REPO_URL='https://mirrors.tuna.tsinghua.edu.cn/git/git-repo/'
并重启终端模拟器。
error: Unable to fully sync the tree.

error: Downloading network changes failed.

Try re-running with "-j1 --fail-fast" to exit at the first error.

carlos@carlos-virtual-machine:~/Android/source$ repo sync -j1 --fail-fast
部分代码同步失败

解决方法：
repo sync -j1 --fail-fast
[100% 135/135] out/soong/.bootstrap/bin/soong_build out/soong/build.ninja

FAILED: out/soong/build.ninja

out/soong/.bootstrap/bin/soong_build -t -l out/.module_paths/Android.bp.list -b out/soong -n out -d out/soong/build.ninja.d -globFile out/soong/.bootstrap/build-globs.ninja -o out/soong/build.ninja Android.bp

internal error: Could not find a supported mac sdk: ["10.10" "10.11" "10.12" "10.13" "10.14"]

internal error: Could not find a supported mac sdk: ["10.10" "10.11" "10.12" "10.13" "10.14"]

17:15:02 soong bootstrap failed with: exit status 1
failed to build some targets (25 seconds)
解决方案：

下载Maxsdks 10.14下载地址复制到/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/目录下，并修改/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Info.plist文件中的（此文件需要使用Xcode打开）

MinimumSDKVersion 为10.14