title: :app:compileDebugJava Failed at Android Studio IDE
body: <p>I have checkout my project branch from SVN at Android Studio with slicSVN workspace. </p>
  
  <p>but when I'm making rebuild whole project but </p>
  
  <blockquote>
    <p>Error:Execution failed for task ':app:compileDebugJava'.
    invalid source release: 1.7"</p>
  </blockquote>
  
  <p>Why this issue had been arise ? <img src="https://i.stack.imgur.com/qV20l.jpg" alt="enter image description here"></p>