title: Unicode character 0x25BA not displayed on Android
body: <p>I'm trying to display the <a href="http://www.fileformat.info/info/unicode/char/25ba/index.htm" rel="nofollow">\u25BA unicode character</a> in a textview, but doing</p>
  
  <pre><code>&lt;TextView android:id="@+id/arrowright" android:layout_width="20dp"
          android:layout_height="240dp" android:gravity="center" android:text="\u25BA"
          android:textSize="14sp" android:textColor="#000000" /&gt;
  </code></pre>
  
  <p>only displays an empty rectangle. This works with other character such as "\u2605".</p>
  
  <p>Is the set of characters android can display limited?</p>