title: How to change clock frequency in Android?
body: <p>I'm a new to software development on Android.</p>
  
  <p>I want to make an application like <a href="http://androinica.com/2010/03/04/make-your-rooted-android-phone-even-faster-with-setcpu-app-reviews/" rel="nofollow">SetCPU</a> that can manipulate CPU frequency in Android.</p>
  
  <p>But I couldn't find some related APIs or materials.</p>
  
  <p><strong>I want to know following two things sincerely.</strong></p>
  
  <ol>
  <li>Are there APIs to change the CPU frequency in Android?</li>
  <li>If not, are there some APIs in Linux?</li>
  </ol>