Gradle behind proxy

update build.gradle project file adding http repositories

buildscript {
    repositories {
        jcenter()
        maven { url "http://jcenter.bintray.com"}
    }
    ...
}

allprojects {
    repositories {
        jcenter()
        jcenter{ url "http://jcenter.bintray.com/" }
        maven { url "http://jcenter.bintray.com"}
    }
}

update also gradle-wrapper.properties with http url instead https

if required set also http proxy in ~/.gradle/gradle.properties

systemProp.http.proxyHost=
systemProp.http.proxyPort=
systemProp.https.proxyHost=
systemProp.https.proxyPort=