A separate download only sdk package, is not included in the SDK in Android Studio for Android Studio user does not need, other self Quguan network download.
1：Android SDK （https://www.androiddevtools.cn/）
2: download the corresponding platform according to their latest version of the corresponding package, I downloaded earlier is shown in Zip, extract directly into the path you want to install the Android.
3: extract the directory as follows
4: Double-click the "SDK Manager.exe", start the SDK Manager, as shown, choose a few to be installed, others see their needs
Tools folder inside the Android SDK Tools, Android SDK Platform-tools and Android SDKBuild-tools, download the latest election
API to select the new version or download according to their own needs, I downloaded a 6.x, 5.x, 7.x, 8.x versions.
What extras in, you can download all, I myself have chosen to download some of the following things:
5: Download FQ possible, the original image can be domestic use, do not know can not, and will not find other FQ software to download.
1: Open Source Association of Chinese Academy of Sciences mirror sites Address:
http://mirrors.opencas.ac.cn ports: 80
2: NII mirror server address:
http://mirrors.neusoft.edu.cn Port: 80
Click on the menu "Tools", then select the drop-down in the "Options ..."
弹出窗口填写对应镜像地址和端口号，再勾选下面的【Forcehttps://... sources to be fetched using http://...】如图：
点击close，关闭对话框，再重新启动SDK Manager。
右下角点击下载，按照提示等待下载，下载成功，后面会显示已安装状态，要是标红安装失败。。emmm找其他软件FQ。。
二、Android SDK 环境配置
1：新建一个系统环境变量，变量名为ANDROID_HOME，变量值为你的SDK安装路径
2：在系统的path变量后追加 ;%ANDROID_HOME%\tools;%ANDROID_HOME%\platform-tools
若原来path变量后面已经有分号，则不要再加分号，要是没有，要加分号。
3：在命令行窗口中输入”adb version“，出现版本号则安装成功
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