title: Rebuild StreamBuilder based on internet connectivity
body: <p>In my app, StreamBuilder is using for firebase and provider for connectivity.</p>
  
  <p>Background:</p>
  
  <p>I switched on the internet and streambuilder loads the images from firebase for 5 lists. Now, I switched off the internet and scrolled up, the images are not loaded and showing placeholder image for the next lists. I think it is correct because of streambuilder loads only for the visible screen. As the images from firebase are not available, the placeholder is considered an ImageStream.</p>
  
  <p>Query:</p>
  
  <p>I want to change/update the placeholder with images when I switch on the internet. Now, snapshot from firebase is the same and placeholder is considered as imagestream, I don't see images from firebase in lists.</p>
  
  <p>With internet connectivity as a provider, I can build the streambuilder but the snapshot is the same, I don't know how to update.</p>