Android SDK Manager cannot update

Problem Description:

The Android SDK Manager cannot download the update, or the update is very slow, or the list of packages to be installed is not displayed. Workaround: First, we'll modify the hosts file. The location of the file is in the system disk (typically C-drive) with the following path: C:\Windows\System32\ drivers\etc\hosts. Find the file, we need to modify the file, some students may find that will not be able to modify the file, this may be because the hosts file is set to read-only properties, we can remove its read-only properties, 1, in the file attributes, the tick in Figure 1 is canceled. Figure 1 The Properties box for the Hosts file Open the Hosts file again, and add the following code in its trailing margin to save:

#Google主页
203.208 . 46.146 www . Google . com
#这行是为了方便打开Android开发官网 don't seem to be able to open a VPN now.
74.125 . 113.121 Developer . Android . com
#更新的内容从以下地址下载
  203.208 . 46.146 DL . Google . com
203.208 . 46.146 DL - SSL . Google . com

Secondin the Android SDK Manager's tool->option option, the HTTPS resource acquisition method is forced to replace the HTTP protocol acquisition. 2 is shown below:   Figure 2 options for modifying the Android SDK manager third, reopen the Android SDK Manager to see if a normal update list is displayed.