[FIXED] Error "Gradle sync failed: Connection refused: connect"

Issue

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 to configure the proxy settings for Gradle and I used the same configurations.

Now, when loading the latest Vuforia Sample project, I get an error:

Gradle sync failed: Connection refused: connect

I've looked everywhere on the web, but I can't find a solution. It can't be the proxy settings; I've configured Gradle just like the IDE.

Solution

You should configure Proxy settings in Android Studio’s menu (File → Settings). Another strategy is to configure the file gradle.properties.

So, add these lines at the end of gradle.properties, located on the app folder base.

---

systemProp.http.proxyPassword=[PASSWORD]
systemProp.http.proxyHost=[IP ADDRESS]
systemProp.https.proxyPort=[PORT, TYPICALLY 3128]
systemProp.https.proxyUser=[USERNAME]
systemProp.https.proxyHost=[IP ADDRESS]
systemProp.https.proxyPassword=[PASSWORD]
systemProp.http.proxyPort=[PORT, TYPICALLY 3128]
systemProp.http.proxyUser=[USERNAME]

Pay attention. The passwords and other values that have special characters must have slash character such as (\#) and so on.

Answered By - e2a
Answer Checked By - Mildred Charles (JavaFixing Admin)