title: display built-in emoji keys for inputmethod
body: <p>I'm building a custom soft keyboard for android and would like to add a layout to include the emoji keys similar to what the default android keyboard (AOSP) is doing. I've searched around but it seems that most people are trying to display custom emoji from images. I'm looking to show the built-in icons that comes with Android (as shown below):</p>
  
  <p><img src="https://i.stack.imgur.com/jngc5.jpg" alt="Android built-in emoji"></p>
  
  <p>It seems that I should be able to use the Unicode characters to send images from the keyboard, but my first attempt seems to generate only the older versions of the emojis. How do I support the latest emoji the phone can handle? Also, how do I display the emojis in my keyboard as in the image above?</p>