title: How to download file using volleyplus library
body: <p>I am using volley <code>com.android.volley:volley:1.1.0</code> library to make normal requests and it is working fine. Now required is to download a pdf file too. For that I need to use volleyplus <code>dev.dworks.libs:volleyplus:+</code></p>
  
  <p>Now since I have added duplicate libraries it gives me error like</p>
  
  <blockquote>
    <p>Execution failed for task ':app:transformDexArchiveWithExternalLibsDexMergerForDebug'.
    Compilation failed; see the compiler error output for details.</p>
  </blockquote>
  
  <p>Also none of the volley class reference is found in the code.</p>
  
  <p>So, how to achieve both the functionality?
  There is nt any kind of image caching related requirements.</p>