title: how to make full screen image in flutter(images from firestore)?
body: <p>i am bit stuck. i am displaying user image uploads inside a gridview .how can i make them go fullscreen on tap? i have checked out the Hero widget but i am not sure how to implement it in my case?</p>
  <p>this is how my grid view looks like.</p>
  <pre><code>_buildDisplayPost()  {
  if (_displayPosts== 0) {
    //grid
  List&lt;GridTile&gt; tiles = [];
  _posts.forEach((post) =&gt; tiles.add(_buildTilePost(post)),);
  return GridView.count(
      crossAxisCount:3,
    childAspectRatio: 1.0,
    mainAxisSpacing: 2,
    crossAxisSpacing: 2,
    shrinkWrap: true,
    children: tiles,
  
  );
  </code></pre>