title: cant access camera roll in photos react native
body: <p>I want to access the phone camera roll photos, in React-native by this code:</p>
  
  <pre><code>_handleButtonPress = () =&gt; {
  
      CameraRoll.getPhotos({
          first: 20,
          assetType: 'Photos',
      })
          .then(r =&gt; {
              this.setState({ photos: r.edges });
          })
          .catch((err) =&gt; {
              alert(err)
          });
  };
  </code></pre>
  
  <p>but i get this Error in alert:</p>
  
  <blockquote>
    <p>could not get photos need: read_external_storage permission</p>
  </blockquote>