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

I caught with same issue and was trying bypass proxies in Mac. Removed proxy from system-level(bashrc) and studio(gradle.properties). had no luck!

Found the studio unable to bypass the proxy, finally found the proxy was cahced in gradle in below file.

~/.gradle/gradle.properties

Essentially to make sure proxy referenes were muted in all gradle.prorties, inlcuding gradle cache.

gradle cache could be find as below(in Android view)

Answer 2

Use gradle.properties file in this path and check proxy info within:

C:\Users\[Windows-User]\.gradle\gradle.properties

I solve the problem by comment proxy definitions in this file.

Commented lines:

#systemProp.http.proxyHost=127.0.0.1
#systemProp.https.proxyPort=9050
#systemProp.https.proxyHost=127.0.0.1
#systemProp.http.proxyPort=9050

# used for comment in gradle files

Answer 3

My case might be unique as in I got an android project code and was facing this error when trying to build it. I just removed the proxy properties in gradle.propertiesand it worked fine.

Answer 4

I got the issue when I download the glide project and solved the issue by install jdk 1.8.0_151 and reset the JAVA_HOME, and my old jdk is 1.8.0_131, I removed the old version.Hope this can help.

Answer 5

If you ever used ShadowsocksX-NG on Mac, (mine is Version 1.7.1 (1)) and once use the Global Mode, it will automatically add the following command: ~/.gradle/gradle.propertries:

#Mon Nov 18 03:59:09 CST 2019
systemProp.http.proxyHost=127.0.0.1
systemProp.https.proxyPort=1086
systemProp.https.proxyHost=127.0.0.1
systemProp.http.proxyPort=1086

When you close the ShadowsocksX-NG, the Android studio still use the proxy, that is why it shows

Gradle sync failed: Connection refused

Plz comment those line out, and rebuild the project again.

## For more details on how to configure your build environment visit
# http://www.gradle.org/docs/current/userguide/build_environment.html
#
# Specifies the JVM arguments used for the daemon process.
# The setting is particularly useful for tweaking memory settings.
# Default value: -Xmx1024m -XX:MaxPermSize=256m
# org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
#
# When configured, Gradle will run in incubating parallel mode.
# This option should only be used with decoupled projects. More details, visit
# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
# org.gradle.parallel=true
#Mon Nov 18 03:59:09 CST 2019
#systemProp.http.proxyHost=127.0.0.1
#systemProp.https.proxyPort=1086
#systemProp.https.proxyHost=127.0.0.1
#systemProp.http.proxyPort=1086

Answer 6

On your Mac open your terminal window and hit below command

echo $proxy

It should return your IP address and port number

Now check your gradle.properties of your project and seyt below properties as per your login details

 systemProp.http.proxyPort=80
 systemProp.http.proxyUser=<userName>
 org.gradle.parallel=true
 systemProp.http.proxyPassword=<PassWord>
 org.gradle.jvmargs=-Xmx1536m
 systemProp.https.proxyHost=<IP Address>
 systemProp.http.proxyHost=<Proxy Host URL>
 systemProp.https.proxyPort=<Port number form above>