Gradle sync failed: Connection refused

Question

So I just installed Android Studio again after a long time and it asked me to configure the proxy, so I did. I tested the connection and it worked.

Then it asked me

Answer 1

Check and review all of these files for having proxy settings:

1. YOUR_PROJECT_ROOT/App/gradle.properties
2. ~/.gradle/gradle.properties
3. ~/.AndroidStudioX.Y/config/options/proxy.settings.xml

note: replaceX.Y with your current android studio version.

Answer 2

I find when I change the option of Preferences -> Appearance & Behavior -> System Settings -> HTTP Proxy to Manual proxy configuration， the gradle properties of the project won't change, so I add:

systemProp.http.proxyHost= myProxyHost
systemProp.http.proxyPort= myProxyPort

Then it runs well.

Answer 3

Amending the gradle.properties file did not work for me. What worked was manually setting the proxy in settings. Additionally I also had to enter my user name and password on for the network.

Wish I hadn't seen this post days ago. Would have saved me time and frustration. Glad though that i persevere and found solution on my own. Mades the frustration more palatable.

Answer 4

Go to Preferences > Appearance & Behavior > System Settings > HTTP Proxy

If your network needs a proxy, setup Manual proxy configuration.

Else, select Auto-detect proxy settings

Answer 5

In your gradle.properties file inside your app project, add the following properties (both HTTP and HTTPS):

systemProp.http.proxyHost=<proxyHost>
systemProp.http.proxyPort=<proxyPort>
systemProp.https.proxyHost=<proxyHost>
systemProp.https.proxyPort=<proxyPort>

If your network has a proxy (not defined in your system configuration), go to:

File > Settings > Appearance & Behavior > System Settings > HTTP Proxy

and setup Manual proxy configuration,

otherwise, check Auto-detect proxy settings.