【背景】
折腾：
【已解决】导入Android项目后编译出错：Unable to resolve target ‘android-19′
期间，需要下载android-19的system-images。
以及：
【已解决】Android项目编译出错：The import android.provider.DocumentsContract cannot be resolved
【已解决】Android项目编译出错：KITKAT cannot be resolved or is not a field
需要下载对应的platforms下面的文件。
【折腾过程】
1.ADT中Android SDK Manager中无法下载，所以去添加代理：
Tools->Options
结果还是无法下载：
Fetching https://dl-ssl.google.com/android/repository/addons_list-2.xml Fetched Add-ons List successfully Fetching URL: https://dl-ssl.google.com/android/repository/repository-7.xml Done loading packages. Fetching https://dl-ssl.google.com/android/repository/addons_list-2.xml Fetching URL: https://dl-ssl.google.com/android/repository/repository-7.xml Failed to fetch URL https://dl-ssl.google.com/android/repository/repository-7.xml, reason: NoHttpResponse The target server failed to respond Fetching URL: https://dl-ssl.google.com/android/repository/repository-7.xml Failed to fetch URL https://dl-ssl.google.com/android/repository/addons_list-2.xml, reason: Connection to https://dl-ssl.google.com refused Fetched Add-ons List successfully Fetching URL: https://dl-ssl.google.com/android/repository/repository-7.xml Failed to fetch URL https://dl-ssl.google.com/android/repository/repository-7.xml, reason: NoHttpResponse The target server failed to respond Done loading packages.
然后通过已有的Android的Eclipse+ADT中去下载或更新，结果都连不上，下载失败：
2.搜到一堆：
Download Android SDK standalone for offline installation | Quakeboy’z Dev Arena
Installing android SDK in eclipse offline – Stack Overflow
How to install older Android SDK in Eclipse – Stack Overflow
而此刻发现：
Android官网链接：
https://developer.android.com/sdk/
http://developer.android.com/tools/help/sdk-manager.html
等等，都打不开了，即使是翻墙也打不开。
3.搜：
Android ADT离线下载
参考：
Android ADT 离线下载技巧（告别在线安装的麻烦） – 蔡熙伟的空间 – 开源中国社区
eclipse – installing android offline is hard[obsolete] – Stack Overflow
只是找了一堆关于ADT的离线下载，好像没看懂，暂时好像不需要。
Download Android SDK standalone for offline installation | Quakeboy’z Dev Arena
->
https://dl-ssl.google.com/android/repository/repository-10.xml
但是也是用不上。
4.搜：
android eclipse system-images download
参考：
Android应用开发相关下载资源(2015/05/06更新) – 平凡的世界 – 博客频道 – CSDN.NET
发现很有用，找到所需要的，去下载：
http://dl.google.com/android/android-sdk_r23.0.2-windows.zip
去下载所需要的android-19的system-images：
system-images/android-19
http://dl-ssl.google.com/android/repository/sysimg_armv7a-19_r02.zip
http://dl-ssl.google.com/android/repository/sys-img/x86/sysimg_x86-19_r02.zip
以及顺带下载adt-bundle：
revision 23.0.2
http://dl.google.com/android/adt/adt-bundle-windows-x86_64-20140702.zip
另外这里也有镜像：
【总结】
在Android官网（有问题，即使翻墙也）无法打开的情况下，想要下载Android的相关开发资源，
可以参考国人总结的：
Android应用开发相关下载资源(2015/05/06更新) – 平凡的世界 – 博客频道 – CSDN.NET
中提到的对应的链接。
直接下载即可。
以及也可以去一些国内的镜像中去看看：
下载所需文件，下载后解压到对应文件夹即可。
比如：
（1）下载后，直接解压到当前文件夹即可的，放在
adt-bundle-windows\sdk\platforms
下面的文件：
Android 1.1 (API 2): https://dl-ssl.google.com/android/repository/android-1.1_r1-windows.zip https://dl-ssl.google.com/android/repository/android-1.1_r1-linux.zip https://dl-ssl.google.com/android/repository/android-1.1_r1-macosx.zip Android 1.5 (API 3): https://dl-ssl.google.com/android/repository/android-1.5_r04-windows.zip https://dl-ssl.google.com/android/repository/android-1.5_r04-linux.zip https://dl-ssl.google.com/android/repository/android-1.5_r04-macosx.zip Android 1.6 (API 4): https://dl-ssl.google.com/android/repository/android-1.6_r03-windows.zip https://dl-ssl.google.com/android/repository/android-1.6_r03-linux.zip https://dl-ssl.google.com/android/repository/android-1.6_r03-macosx.zip Android 2.0 (API 5) Obsolete: https://dl-ssl.google.com/android/repository/android-2.0_r01-windows.zip https://dl-ssl.google.com/android/repository/android-2.0_r01-linux.zip https://dl-ssl.google.com/android/repository/android-2.0_r01-macosx.zip Android 2.0.1 (API 6) Obsolete: https://dl-ssl.google.com/android/repository/android-2.0.1_r01-windows.zip https://dl-ssl.google.com/android/repository/android-2.0.1_r01-linux.zip https://dl-ssl.google.com/android/repository/android-2.0.1_r01-macosx.zip Android 2.1 (API 7): https://dl-ssl.google.com/android/repository/android-2.1_r03-linux.zip Android 2.2 (API 8): https://dl-ssl.google.com/android/repository/android-2.2_r03-linux.zip Android 2.3 (API 9) Obsolete: https://dl-ssl.google.com/android/repository/android-2.3.1_r02-linux.zip Android 2.3.3 (API 10): https://dl-ssl.google.com/android/repository/android-2.3.3_r02-linux.zip Android 3.0 (API 11): https://dl-ssl.google.com/android/repository/android-3.0_r02-linux.zip Android 3.1 (API 12): https://dl-ssl.google.com/android/repository/android-3.1_r03-linux.zip Android 3.2 (API 13): https://dl-ssl.google.com/android/repository/android-3.2_r01-linux.zip Android 4.0 (API 14): https://dl-ssl.google.com/android/repository/android-14_r04.zip Android 4.0.3 (API 15): https://dl-ssl.google.com/android/repository/android-15_r05.zip Android 4.1.2 (API 16): https://dl-ssl.google.com/android/repository/android-16_r05.zip Android 4.2.2 (API 17): https://dl-ssl.google.com/android/repository/android-17_r03.zip Android 4.3 (API 18): https://dl-ssl.google.com/android/repository/android-18_r03.zip Android 4.4.2 (API 19): https://dl-ssl.google.com/android/repository/android-19_r04.zip Android 4.4W (API 20): https://dl-ssl.google.com/android/repository/android-20_r02.zip Android L (API 20, L Preview): https://dl-ssl.google.com/android/repository/android-L_r04.zip Android 5.0.1 (API 21): https://dl-ssl.google.com/android/repository/android-21_r02.zip Android 5.1 (API 22): https://dl-ssl.google.com/android/repository/android-22_r02.zip
（2）下载后，解压到对应的：
adt-bundle-windows\sdk\system-images
文件夹下即可
system-images/android-10 http://dl-ssl.google.com/android/repository/sys-img/x86/sysimg_x86-10_r02.zip system-images/android-14 https://dl-ssl.google.com/android/repository/sysimg_armv7a-14_r02.zip system-images/android-15 https://dl-ssl.google.com/android/repository/sysimg_armv7a-15_r02.zip https://dl-ssl.google.com/android/repository/sys-img/mips/sysimg_mips-15_r01.zip https://dl-ssl.google.com/android/repository/sys-img/x86/sysimg_x86-15_r01.zip system-images/android-16 https://dl-ssl.google.com/android/repository/sysimg_armv7a-16_r03.zip https://dl-ssl.google.com/android/repository/sys-img/mips/sysimg_mips-16_r04.zip https://dl-ssl.google.com/android/repository/sys-img/x86/sysimg_x86-16_r01.zip system-images/android-17 http://dl-ssl.google.com/android/repository/sysimg_armv7a-17_r02.zip http://dl-ssl.google.com/android/repository/sys-img/mips/sysimg_mips-17_r01.zip http://dl-ssl.google.com/android/repository/sys-img/x86/sysimg_x86-17_r01.zip system-images/android-18 http://dl-ssl.google.com/android/repository/sysimg_armv7a-18_r02.zip http://dl-ssl.google.com/android/repository/sys-img/x86/sysimg_x86-18_r01.zip system-images/android-19 http://dl-ssl.google.com/android/repository/sysimg_armv7a-19_r02.zip http://dl-ssl.google.com/android/repository/sys-img/x86/sysimg_x86-19_r02.zip system-images/android-20/android-wear https://dl-ssl.google.com/android/repository/sys-img/android-wear/android-wear-sysimg-1077298.zip https://dl-ssl.google.com/android/repository/sys-img/android-wear/sysimg_wear_arm-20_r04.zip https://dl-ssl.google.com/android/repository/sys-img/android-wear/sysimg_wear_x86-20_r04.zip system-images/android-L https://dl-ssl.google.com/android/repository/sys-img/android/sysimg_armv7a-L_r01.zip https://dl-ssl.google.com/android/repository/sys-img/android/sysimg_arm-L_r02.zip https://dl-ssl.google.com/android/repository/sys-img/android/sysimg_x86-L_r02.zip https://dl-ssl.google.com/android/repository/sys-img/android/sysimg_x86_64-L_r01.zip system-images/android-L/android-tv https://dl-ssl.google.com/android/repository/sys-img/android-tv/sysimg_tv_arm-L_r02.zip https://dl-ssl.google.com/android/repository/sys-img/android-tv/sysimg_tv_x86-L_r02.zip system-images/android-21 https://dl-ssl.google.com/android/repository/sys-img/android/sysimg_arm-21_r03.zip https://dl-ssl.google.com/android/repository/sys-img/android/sysimg_x86-21_r03.zip https://dl-ssl.google.com/android/repository/sys-img/android/sysimg_x86_64-21_r03.zip https://dl-ssl.google.com/android/repository/sys-img/android-tv/sysimg_atv_arm-21_r03.zip https://dl-ssl.google.com/android/repository/sys-img/android-tv/sysimg_atv_x86-21_r03.zip https://dl-ssl.google.com/android/repository/sys-img/android-wear/sysimg_wear_arm-21_r03.zip https://dl-ssl.google.com/android/repository/sys-img/android-wear/sysimg_wear_x86-21_r03.zip https://dl-ssl.google.com/android/repository/sys-img/google_apis/sysimg_arm-21_r05.zip https://dl-ssl.google.com/android/repository/sys-img/google_apis/sysimg_x86-21_r05.zip https://dl-ssl.google.com/android/repository/sys-img/google_apis/sysimg_x86_64-21_r05.zip system-images/android-22 https://dl-ssl.google.com/android/repository/sys-img/android/sysimg_arm-22_r01.zip https://dl-ssl.google.com/android/repository/sys-img/android/sysimg_x86-22_r01.zip https://dl-ssl.google.com/android/repository/sys-img/android/sysimg_x86_64-22_r01.zip https://dl-ssl.google.com/android/repository/sys-img/android-tv/sysimg_atv_arm-22_r01.zip https://dl-ssl.google.com/android/repository/sys-img/android-tv/sysimg_atv_x86-22_r01.zip https://dl-ssl.google.com/android/repository/sys-img/google_apis/sysimg_arm-22_r01.zip https://dl-ssl.google.com/android/repository/sys-img/google_apis/sysimg_x86-22_r01.zip https://dl-ssl.google.com/android/repository/sys-img/google_apis/sysimg_x86_64-22_r01.zip
目前此处主要用到就是上面这两部分的，效果如下：
（1）android\adt-bundle-windows\sdk\platforms
（2）android\adt-bundle-windows\sdk\system-images
其他文件，根据自己需要去下载即可。
转载请注明：在路上 » 【已解决】下载Android的Eclipse+ADT的platforms和system image文件