Google已经恢复了android代码的获取，可以参看他的android source的官方网站
http://source.android.com/source/index.html
To check out a branch other than "master", specify it with -b:
$ repo init -u https://android.googlesource.com/platform/manifest -b android-2.3.7_r1
Starting with Donut, the exact list of tags and builds is in the following table:
| Build | Tag | Notes |
|---|---|---|
| DRC83 | android-1.6_r1.1 | earliest Donut version, ADP1, ADP2 |
| DRC92 | android-1.6_r1.2 | |
| DRD08 | android-1.6_r1.3 | |
| DRD20 | android-1.6_r1.4 | |
| DMD64 | android-1.6_r1.5 | latest Donut version |
| ESD20 | android-2.0_r1 | earliest Eclair version |
| ESD56 | android-2.0.1_r1 | |
| ERD79 | android-2.1_r1 | Nexus One |
| ERE27 | android-2.1_r2 | Nexus One |
| EPE54B | android-2.1_r2.1p | Nexus One |
| ESE81 | android-2.1_r2.1s | |
| EPF21B | android-2.1_r2.1p2 | latest Eclair version |
| FRF85B | android-2.2_r1 | earliest Froyo version, Nexus One |
| FRF91 | android-2.2_r1.1 | Nexus One |
| FRG01B | android-2.2_r1.2 | |
| FRG22D | android-2.2_r1.3 | |
| FRG83 | android-2.2.1_r1 | Nexus One |
| FRG83D | android-2.2.1_r2 | Nexus One |
| FRG83G | android-2.2.2_r1 | latest Froyo version, Nexus One |
| GRH55 | android-2.3_r1 | earliest Gingerbread version, Nexus S |
| GRH78 | android-2.3.1_r1 | Nexus S |
| GRH78C | android-2.3.2_r1 | Nexus S |
| GRI40 | android-2.3.3_r1 | Nexus One, Nexus S |
| GRI54 | android-2.3.3_r1.1 | Nexus S |
| GRJ06D | android-2.3.4_r0.9 | Nexus S 4G |
| GRJ22 | android-2.3.4_r1 | Nexus One, Nexus S, Nexus S 4G |
| GRJ90 | android-2.3.5_r1 | Nexus S 4G |
| GRK39C | android-2.3.6_r0.9 | Nexus S |
| GRK39F | android-2.3.6_r1 | Nexus One, Nexus S |
| GWK74 | android-2.3.7_r1 | latest Gingerbread version, Nexus S 4G |
回头试一下～