下面为两种解决办法，任何一种都可以
一、
curl "http://php.webtutor.pl/en/wp-content/uploads/2011/09/repo" >~/bin/repo
二、
打开 gedit /etc/hosts
添加如下内容：
74.125.237.1 dl-ssl.google.com
@Ubuntu:~$ curl https://dl-ssl.google.com/dl/googlesource/git-repo/repo > ~/bin/repo
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 22889 100 22889 0 0 20152 0 0:00:01 0:00:01 --:--:-- 24221
@ubuntu:~$
chmod a+x ~/bin/repo
5、
Initializing a Repo client
$ mkdir WORKING_DIRECTORY
$ cd WORKING_DIRECTORY
$ repo init -u https://Android.googlesource.com/platform/manifest
遇到如下问题：
@ubuntu:~/WORKING_DIRECTORY$ repo init -u https://android.googlesource.com/platform/manifest
gpg: key 920F5C65: "Repo Maintainer <repo@android.kernel.org>" not changed
gpg: key 338871A4: public key "Conley Owens <cco3@android.com>" imported
gpg: Total number processed: 2
gpg: imported: 1 (RSA: 1)
gpg: unchanged: 1
fatal: Cannot get https://gerrit.googlesource.com/git-repo/clone.bundle
fatal: error [Errno 101] Network is unreachable
或者：
* [new tag] v1.9.5 -> v1.9.5
* [new tag] v1.9.6 -> v1.9.6
Get https://android.googlesource.com/platform/manifest
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- 0:00:06 --:--:-- 0
curl: (22) The requested URL returned error: 404
Server does not provide clone.bundle; ignoring.
remote: Counting objects: 92, done
remote: Finding sources: 100% (92/92)
remote: Total 816 (delta 96), reused 816 (delta 96)
Receiving objects: 100% (816/816), 708.29 KiB | 247 KiB/s, done.
Resolving deltas: 100% (96/96), done.
From https://android.googlesource.com/platform/manifest
* [new branch] android-1.6_r1 -> origin/android-1.6_r1
解决方法，官网说明，和网上统一口径，如下：
1， 先按官网的步骤一步步执行
2，当遇到上述问题后，用浏览器登录https://android.googlesource.com/new-password，并用gmail帐号登录；
3， 点击网页上的“允许访问”，得到类似的结果：
machine android.googlesource.com login git-<userName>.gmail.com password <password>
machine android-review.googlesource.com login git-<userName>.gmail.com password <password>
将上边的两行追加到~/.netrc文件结尾。（如果你的linux系统中从来没有建立过此文件，就在home目录下建立.netrc文件，将上面的信息加到新建的文件中去），
4，下载地址的URI更改为https://android.googlesource.com/a/platform/manifest（中间加上了“/a”）。
因为访问基本是匿名的，为了防止连接过多，对同一IP地址的连接数做了一定的限制。用gmail帐号进行认证。
在公司网络内或者用虚拟机下载的话，会经常遇到这问题。
如果遇到下面问题
@ubuntu:~/WORKING_DIRECTORY$
@ubuntu:~/WORKING_DIRECTORY$ repo init -u https://android.googlesource.com/a/platform/manifest --config
Your Name [jianguo liao]: jianguo liao
Your Email [liaojianguo19840726@gmail.com]: liaojianguo19840726@gmail.com
Your identity is: jianguo liao <liaojianguo19840726@gmail.com>
is this correct [y/N]? y
repo has been initialized in /home/jianguoliao/WORKING_DIRECTORY
解决
@ubuntu:~/WORKING_DIRECTORY$ repo init -u https://android.googlesource.com/platform/manifest
Your identity is: jianguo liao <liaojianguo19840726@gmail.com>
If you want to change this, please re-run 'repo init' with --config-name
或者：注意没有/a哦
@ubuntu:~/WORKING_DIRECTORY$ repo init -u https://android.googlesource.com/platform/manifest --config
Your Name [jianguo liao]: jianguo liao
Your Email [liaojianguo19840726@gmail.com]: liaojianguo19840726@gmail.com
Your identity is: jianguo liao <liaojianguo19840726@gmail.com>
is this correct [y/N]? y
repo has been initialized in /home/jianguoliao/WORKING_DIRECTORY
@ubuntu:~/WORKING_DIRECTORY$
接着搞：
@ubuntu:~/WORKING_DIRECTORY$ repo init -u https://android.googlesource.com/platform/manifest -b android-4.0.1_r1
.repo/manifests/: discarding 88 commits
Your identity is: jianguo liao <liaojianguo19840726@gmail.com>
If you want to change this, please re-run 'repo init' with --config-name
repo has been initialized in /home/jianguoliao/WORKING_DIRECTORY
@ubuntu:~/WORKING_DIRECTORY$
好吧，接下来最后一步了
$ repo sync
网上有朋友建议，写个脚本如下：
#!/bin/bash
echo "======start repo sync======"
repo sync
while [ $? = 1 ]; do
echo "======sync failed, re-sync again======"
sleep 3
repo sync
done
其中还遇到如下问题，经常提示如下信息，网上有朋友建议：
error: Failed connect to android.googlesource.com:443;Connection refused while accessinghttps://android.googlesource.com/a/platform/frameworks/base/info/refs
fatal: HTTP request failed
error: Cannot fetch platform/tools/motodev
error: Cannot fetch platform/frameworks/base
error: Cannot fetch platform/prebuilts/sdk
error: Exited sync due to fetch errors
等错误信息。
解决方法：编辑/etc/hosts文件
$ sudo gedit /etc/hosts
增加下面内容，保存
74.125.71.82
74.125.31.82 android.googlesource.com
203.208.46.172 cache.pack.google.com
59.24.3.173cache.pack.google.com
此外，还需下载编译库等工具，可用下面命令：
sudo apt-get install git-core gnupg flex bison gperf libsdl-dev libesd0-dev libwxgtk2.6-dev build-essential zip curl python sun-java5-jdk valgrind lib32readline5 wx-common
这里部分工具是专用于AMD64 位环境的有时Java5 可能无法下载,可有以下尝试解决此问题：
第一种尝试：下载java 1.5 的安装bin 包手动安装，最终失败， 具体过程如下：
download java5:
https://launchpadlibrarian.net/24508358/sun-java5_1.5.0-18.orig.tar.gz tar,
chmod a+x, ./xxxx.bin
mkdir /usr/lib/jvm
cp jdk-5.0u18-dlj-linux-i586.bin to /usr/lib/jvm
run jdk-5.0u18-dlj-linux-i586.bin to install java into /usr/lib/jvm/jdk1.5.0_18
add below lines in /etc/enviroment:
JAVA_HOME=/usr/lib/jvm/jdk1.5.0_18
JRE_HOME=/usr/lib/jvm/jdk1.5.0_18/jre
CLASSPATH=.:/usr/lib/jvm/jdk1.5.0_18/lib:/usr/lib/jvm/jdk1.5.0_18/jre/lib
$ java -version
Error occurred during initialization of VM
java/lang/NoClassDefFoundError: java/lang/Object
第二种尝试：非常简单，但是有效：
修改source ，将9.10 的源改成9.04 的源。源在/etc/apt/source.list ：
deb jaunty main restricted universe multiverse
deb jaunty-security main restricted universe multiverse
deb jaunty-updates main restricted universe multiverse
deb jaunty-proposed main restricted universe multiverse
deb jaunty-backports main restricted universe multiverse
deb-src jaunty main restricted universe multiverse
deb-src jaunty-security main restricted universe multiverse
deb-src jaunty-updates main restricted universe multiverse
deb-src jaunty-proposed main restricted universe multiverse
deb-src jaunty-backports main restricted universe multiverse
运行：sudo apt-get update 之后，用sudo apt-get install sun-java5-jdk 即可像以往一样安装java 1.5
或按以下源添加JDK：
1.5的：
执行sudo gedit /etc/apt/sources.list，
添加以下内容，将10.04的源改成9.04的源。
deb jaunty multiverse
deb jaunty-updates multiverse
然后sudo apt-get update
再用sudo apt-get install sun-java5-jdk