repo init -u git://Android.git.kernel.org/platform/manifest.git
取得分支，获得的是最近的正在研发的代码，而不是你想要的稳定代码。
所以我们获取稳定的代码，先要看看当前有些什么branch.
打开android 官网 http://source.android.com/source/downloading.html
获取repo 脚本 ，
curl https://dl-ssl.google.com/dl/googlesource/git-repo/repo > ~/bin/repo在你的android 目录下： sudo git clone https://android.googlesource.com/platform/manifest cd manifest git branch -a master remotes/origin/HEAD -> origin/master remotes/origin/android-1.6_r1 remotes/origin/android-1.6_r1.1 remotes/origin/android-1.6_r1.2 remotes/origin/android-1.6_r1.3 remotes/origin/android-1.6_r1.4 remotes/origin/android-1.6_r1.5 remotes/origin/android-1.6_r2 remotes/origin/android-2.0.1_r1 remotes/origin/android-2.0_r1 remotes/origin/android-2.1_r1 remotes/origin/android-2.1_r2 remotes/origin/android-2.1_r2.1p remotes/origin/android-2.1_r2.1p2 remotes/origin/android-2.1_r2.1s remotes/origin/android-2.2.1_r1 remotes/origin/android-2.2.1_r2 remotes/origin/android-2.2.2_r1 remotes/origin/android-2.2.3_r1 remotes/origin/android-2.2.3_r2 remotes/origin/android-2.2_r1 remotes/origin/android-2.2_r1.1 remotes/origin/android-2.2_r1.2 remotes/origin/android-2.2_r1.3 remotes/origin/android-2.3.1_r1 remotes/origin/android-2.3.2_r1 remotes/origin/android-2.3.3_r1 remotes/origin/android-2.3.3_r1.1 remotes/origin/android-2.3.4_r0.9 remotes/origin/android-2.3.4_r1 remotes/origin/android-2.3.5_r1 remotes/origin/android-2.3.6_r0.9 remotes/origin/android-2.3.6_r1 remotes/origin/android-2.3.7_r1 remotes/origin/android-2.3_r1 remotes/origin/android-4.0.1_r1 remotes/origin/android-4.0.1_r1.1 remotes/origin/android-4.0.1_r1.2 remotes/origin/android-4.0.2_r1 remotes/origin/android-4.0.3_r1 remotes/origin/android-cts-2.2_r8 remotes/origin/android-cts-2.3_r10 remotes/origin/android-cts-2.3_r11 remotes/origin/android-cts-4.0_r1 remotes/origin/android-cts-verifier-4.0_r1 remotes/origin/android-sdk-4.0.3-tools_r1 remotes/origin/android-sdk-4.0.3_r1 remotes/origin/android-sdk-adt_r16.0.1 remotes/origin/froyo remotes/origin/gingerbread remotes/origin/gingerbread-release remotes/origin/ics-mr0 remotes/origin/ics-mr1 remotes/origin/master remotes/origin/tradefed 默认取得的是master了。用 repo init -u https://android.googlesource.com/platform/manifest -b android-2.3.5_r1就取到了 android-2.3.5_r1 版本
