问题
There is something wrong with my SDK manager, which only show the installed package. I couldn't install the others.
*I downloaded the ADT bundle for windows from http://developer.android.com/sdk/index.html
Does anyone know why? Thx!
回答1:
Have you tried running the SDK Manager with Run as Administrator?
It always fails loading or downloading packages for me when it isn't ran as an admin.
回答2:
I had the same problem and its about proxy issues I think. To solve it: in SDK manager go to Tools > options In other section check the below: force https://... sources to be fetched using http://...
Then it will fetch all the packages!
回答3:
I often get temporary connection errors on the dl-ssl.google.com repo site. To determine if it's a simple connectivity issue, you could attempt to connect to one of the repo file links via your browser.
回答4:
This worked for me -
Keep HTTP proxy server and HTTP proxy port empty (from Tools -> option)
and check force https
回答5:
Manager is unable to load list of packages from repository, probably it's proxy or firewall issue (as I know, it uses standard http). So, it just doesn't know anything about non-installed packages.
Check your internet connection and try again (there is a button "Reload" in the "Packages" menu)
回答6:
You can download only SDK here: http://dl.google.com/android/installer_r22.0.5-windows.exe and install all use this.
回答7:
Check my solution on this issue. You may need to use a Proxy to connect to the internet then attempt your download. See this answer
I believe this should solve your problem, seemingly your having connection issues.
来源：https://stackoverflow.com/questions/18169816/android-sdk-manager-only-show-installed-package