title: Android Studio : 407 Proxy Authentication Required
body: <p>I have installed <a href="https://developer.android.com/studio/preview/" rel="nofollow noreferrer">Android Studio Preview</a> version since the stable IDE version does not support the JetPack that is being used in my application.</p>
  
  <p>But I am facing proxy issue while syncing the project,</p>
  
  <blockquote>
    <p>ERROR: Could not GET
    '<a href="https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom" rel="nofollow noreferrer">https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom</a>'.
    Received status code 407 from server: Proxy Authentication Required
    Enable Gradle 'offline mode' and sync project</p>
  </blockquote>
  
  <p>I have set proxy using both from Android studio settings and gradle.properties file,</p>
  
  <p><strong>gradle.properties</strong></p>
  
  <pre><code>systemProp.http.proxyPort=xxxx
  systemProp.http.proxyUser=xxxxx
  systemProp.http.proxyPassword=xxxxx
  org.gradle.jvmargs=-Xmx1536m
  systemProp.https.proxyPassword=xxxxx
  systemProp.https.proxyHost=xxxxx
  systemProp.http.proxyHost=xxxxx
  systemProp.https.proxyPort=xxxxx
  systemProp.https.proxyUser=xxxxx
  </code></pre>
  
  <p>Still project sync gives the same error. Any solutions?</p>
  
  <p><strong>Studio Version :</strong> Android Studio 3.3 Beta 4</p>