title: Android Studio failed to sync Gradle
body: <p>Till yesterday everything was working properly in my application and I could program using <code>android studio</code> without any problems.But today when I ran the same application I encountered with this error:</p>
  
  <pre><code>&gt; Failed to sync  project&lt;br/&gt; Error:Unknown host services.gradle.org.&lt;br/&gt; Learn
  &gt; about configuring HTTP proxies in Gradle
  </code></pre>
  
  <p>I've tried some solutions but didn't work .really don't know what happened.</p>
  
  <p>Here is my system software specification:
  Android studio version : 1.0.1
  JDK version :1.8</p>