Merge "docs: Added emoji section to api overview." into mnc-io-docs am: 20501e81

        <li><a href="#scoped_directory_access">Scoped directory access</a></li>

        <li><a href="#print_svc">Print service enhancements</a></li>

        <li><a href="#virtual_files">Virtual Files</a></li>

        <li><a href="#emoji">New Emojis</a></li>

      </ol>

</div>

</div>

  <a href="{@docRoot}guide/topics/providers/document-provider.html">Storage

  Access Frameworks guide</a>.

</p>

<h2 id="emoji">New Emojis</h2>

<p>

  Android N introduces new emojis, including skin tone emojis, support

  for variation

  selectors, and other improvements. For a good user experience, observe the

  following guidelines for using the new emojis and emoji features in your apps.

</p>

<ul>

  <li>

    <strong>New emojis</strong>: To check which emojis are present in the

    system font, use the {@link android.graphics.Paint#hasGlyph(String)} method

    and the dynamic layout in the emoji picker to place the glyphs.

  </li>

  <li>

    <strong>Variation selectors</strong>: Variation selectors allow certain

    emojis to be represented in color or in text presentation, which is used in

    documents. For mobile devices, emojis should use their color representation.

    To determine whether an emoji has a variation, use the variation selector.

    You can view the complete list of characters with variations in the

    <em>emoji variation sequences</em> section of the

    <a href="http://www.unicode.org/Public/9.0.0/ucd/StandardizedVariants-9.0.0d1.txt">

      Unicode documentation on variations</a>.

  </li>

  <li>

    <strong>Skin tone modifiers</strong>: In Android N, users can modify the

    rendered skin tone of emojis. This allows users to customize the presentation

    of emojis to their preference. Keyboard apps should provide visual

    indications for emojis that have multiple skin tones and should allow users to

    select the skin tone that they prefer. To determine which system emojis have

    skin tone modifiers, use the {@link android.graphics.Paint#hasGlyph(String)}

    method. You can determine which emojis use skin tones by reading the

    <a href="http://unicode.org/emoji/charts/full-emoji-list.html">

     Unicode documentation</a>.

  </li>

</ul>

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