title: Some unicodes in Android EditText can not show correctly
body: <p>I just found that the following red marked unicodes can not be shown on Android EditText</p>
  
  <p>Anyboday has met similar issue? And how can I resolve this issue?</p>
  
  <p>Edit again:
  I attached another picture to shown the unicode and the corresponding result in Android</p>
  
  <p><img src="https://i.stack.imgur.com/4jtVh.jpg" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/5h6MD.png" alt="enter image description here"></p>