title: how to set the text containings emoji char to textView
body: <p>when getting some text from server and put in textView, found some char cannot display (on os M). It turns out there are some emoji char in the text.</p>
  
  <p>something similar to do like:</p>
  
  <pre><code>theTextGotFromServer = "some text, then emoji code: \uD83D\uDE46\uD83C\uDFFE\uD83E\uDD16 some more text";
  mTextView.setText(fromCardInfo); 
  </code></pre>
  
  <p>But on OS 7, all the emoji char are displayed correctly with the emojis.</p>