(1)Android SDK (Android SDK主安装包，包含SDK Manager、AVD Manager、工具包tools，释放后的根文件夹为android-sdk-windows):
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(2)tools (Android SDK的工具包，释放到android-sdk-windows下，文件夹tools覆盖android-sdk-windows/tools)
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说明: 以下第(3)点到(11)点，可以将安装包放在文件夹android-sdk-windows/temp下，通过SDK Manager自动安装释放到相应位置.
(3)platform-tools (Android平台工具包，释放到android-sdk-windows下，产生文件夹platform-tools)
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(4)build-tools (释放到android-sdk-windows下，产生文件夹build-tools，各版本都可能用到)
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(5)platforms (各种版本的Android平台，释放到android-sdk-windows/platforms下)
Android 1.1 (API 2):
Android 1.5 (API 3):
Android 1.6 (API 4):
Android 2.0 (API 5) Obsolete:
Android 2.0.1 (API 6) Obsolete:
Android 2.1 (API 7):
Android 2.2 (API 8):
Android 2.3 (API 9) Obsolete:
Android 2.3.3 (API 10):
Android 3.0 (API 11):
Android 3.1 (API 12):
Android 3.2 (API 13):
Android 4.0 (API 14):
Android 4.0.3 (API 15):
Android 4.1.2 (API 16):
Android 4.2.2 (API 17):
Android 4.3 (API 18):
Android 4.4.2 (API 19):
Android 4.4W (API 20):
Android 5.0.1 (API 21):
Android 5.1 (API 22):
Android 6.0 (API 23):
Android 6.X (API 24):
(6)system-images (Android系统镜像，释放到android-sdk-windows/system-images/android-xx下[xx对应api版本数字])
system-images/android-10
system-images/android-14
system-images/android-15
system-images/android-16
system-images/android-17
system-images/android-18
system-images/android-19
system-images/android-20/android-wear
system-images/android-21
system-images/android-22
system-images/android-23
system-images/android-24
(7)docs (文档，释放到android-sdk-windows下，会产生文件夹docs)
(8)samples (应用实例，释放到android-sdk-windows/samples下)
(9)sources (Android SDK源程序，释放到android-sdk-windows/sources/android-xx下[xx对应api版本数字])
(10)extras (扩展应用，释放到android-sdk-windows/extras下)
GPU Debugging tools 3.1
GPU Debugging tools 1.0.3
Android Support Repository(extras/android/m2repository)
Android Support Library(extras/android/support)
Android Auto Desktop Head Unit emulator
Google AdMob Ads SDK(extras/google/admob_ads_sdk) (Obsolete)
Google Analytics App Tracking SDK(extras/google/analytics_sdk_v2) (Obsolete)
Google Cloud Messaging for Android Library(extras/google/gcm) (Obsolete)
Google Play services for Froyo
Google Play services(extras/google/google_play_services)
Google Repository(extras/google/m2repository)
Google Play APK Expansion Library(extras/google/play_apk_expansion)
Google Play Billing Library(extras/google/play_billing)
Google Play Licensing Library(extras/google/play_licensing)
Android Auto API Simulators
Google USB Driver(extras/usb_driver)
Google Web Driver(extras/google/webdriver)
Intel x86 Emulator Accelerator(HAXM installer)(extras/intel/Hardware_Accelerated_Execution_Manager)
(11)add-ons (google手机api,释放到android-sdk-windows/add-ons/)
addon-google_apis-google-xx[xx对应api版本数字]
Glass Development Kit Preview
addon-intel_atom_x86_system_image-intel_corporation-xx
addon-dual_screen_apis-kyocera_corporation-xx (Dual Screen api)
addon-sony_xperia_extensions_edk_2_0-sony_mobile_communications_ab-xx
addon-real3d-lge-xx
addon-htc_opensense_sdk-htc-15
addon-htc_opensense_apis-16
(12)ADT Plugin for Eclipse
(13)Android Developer Tools(基于Eclipse的Android开发环境，已包含Eclipse与ADT).
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(14)Android NDK
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(15)Android Studio(The official Android IDE)
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Android SDK 官方下载页面
Android Studio中文组
Android SDK 在线更新镜像服务器资源：
大连东软信息学院镜像服务器地址:
北京化工大学镜像服务器地址:
上海GDG镜像服务器地址:
中国科学院开源协会镜像站地址:
腾讯Bugly 镜像:
Android Open Source
Android Open Source 国内镜像站点
