title: Android ADT 21.0 warning: Implicitly using the default locale
body: <p>I've updated ADT to v. 21 and new warning appeared in this code:</p>
  
  <pre><code>if (e.getMessage().toLowerCase().contains("blabla"))
  
  Implicitly using the default locale is a common source of bugs: Use toLowerCase(Locale) instead
  </code></pre>
  
  <p>So I try:</p>
  
  <pre><code>if (e.getMessage().toLowerCase(Locale.ENGLISH).contains("blabla"))
  </code></pre>
  
  <p>But error still remained! How fix this?</p>