title: NoSuchMethodError: String.isEmpty
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/4396844/scala-on-android-java-lang-nosuchmethoderror-java-lang-string-isempty">Scala on Android: java.lang.NoSuchMethodError: java.lang.String.isEmpty</a>  </p>
  </blockquote>
  
  
  
  <p>I've just released a new app on Android</p>
  
  <p>I've optimized and obfuscated the code with proguard and tested extensively on my Android 2.3.3 phone. It works all right.</p>
  
  <p>However, I keep getting really strange crash reports in the developer console, such as </p>
  
  <pre><code>java.lang.NoSuchMethodError: java.lang.String.isEmpty
  </code></pre>
  
  <p>Isn't <code>String.isEmpty()</code> a framework function on all Android devices?</p>