title: How to implement the Material-design Elevation for Pre-lollipop
body: <p>Google has shown some nice ways that elevation effect are shown on Lollipop <a href="http://developer.android.com/training/material/shadows-clipping.html" rel="noreferrer">here</a>.</p>
  
  <pre><code>android:elevation="2dp"
  </code></pre>
  
  <p>for buttons,</p>
  
  <pre><code>android:stateListAnimator="@anim/button_state_list_animator"
  </code></pre>
  
  <p><strong>How can I mimic the elevation effect on pre-Lollipop versions without 3rd party library?</strong></p>