title: Facebook shareDialog doesn't show anything
body: <p>I'm trying to share some content's on facebook but i have a lot of problems.
  i've add the correct keyhash, and created the app on facebook and put it live.
  When i try to share something it seems good as you can see:</p>
  
  <p><img src="https://i.stack.imgur.com/ws6L0.png" alt="enter image description here"></p>
  
  <p>But after i've clicked on post it's empty:
  <img src="https://i.stack.imgur.com/rEzBB.jpg" alt="enter image description here"></p>
  
  <p>It's a permission problem? i've read a lot about this on stack but i can't find an answer that works...
  That's the code :</p>
  
  <pre><code>public boolean onOptionsItemSelected(MenuItem item) {
          switch (item.getItemId()) 
          {
              case R.id.action_share:         
                  Intent intent2=new Intent(Intent.ACTION_SEND);
                  intent2.setType("text/plain");
                  intent2.putExtra(Intent.EXTRA_TEXT,"'"+ random + "'" + "\n"+"By Random Quotes"); 
                  startActivity(Intent.createChooser(intent2, "Share via"));
                  break;
  
                  case R.id.randombut:
                       Frasi();
  
                  case android.R.id.home:
                      Intent homeIntent = new Intent(this, MainActivity.class);
                      homeIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                      startActivity(homeIntent);
                  break;
  
                  case R.id.facebook:
                      FacebookDialog shareDialog = new FacebookDialog.ShareDialogBuilder(this)
                      .setApplicationName("Random Quotes")
                      .setDescription(random)
                  .setPicture("https://lh6.ggpht.com/1UJ89ho9pvVLPYS6NsFVQdb7KoQPALMhkw1w7DnNDqcfDYJ-tRxruaf2YLMLyqhnG_g=w300-rw")
                      .setLink("https://play.google.com/store/apps/details?id=com.techappstudios.randomquotes")
                      .build();
                      uiHelper.trackPendingDialogCall(shareDialog.present());
  
           }
          return true;
      }
  </code></pre>