title: Can't display downloaded image from RNFS.DocumentDirectoryPath
body: <p>I've successfully saved the image from url with the response 
  {"jobId" : 1, "statucCode" : 200, "byteWritten" : 127744 }</p>
  
  <p>but I can't display the image.</p>
  
  <p>downloadFile(){</p>
  
  <pre><code>var RNFS = require('react-native-fs');
  
  const uri = 'https://images.unsplash.com/photo-1525184275980-9028ceb8e09f?auto=format&amp;fit=crop&amp;w=1050&amp;q=80' ; 
  const name = shorthash.unique(uri);
  const path = `${RNFS.DocumentDirectoryPath}/${name}.png`;
  
  RNFS.downloadFile({fromUrl:uri, toFile: path}).promise
      .then((res) =&gt; { 
          this.setState({ source:{uri:path}}) ;
      }).catch((err) =&gt; { 
          alert(err)
       });
  }
  </code></pre>
  
  <p>the state will be like source : { "uri" : "path" }</p>
  
  <p></p>