title: Downgrade Android App Sdk
body: <p>So I have a phone with <code>Lollipop (5.0)</code> and want to make my app compatible with phones that have <code>KitKat(4.4)</code>. <code>Min Sdk Version: 19</code>. <code>Target Sdk version: API 21 (lollipop)</code>. <code>Build tools version: 21.1.2</code>. <code>Compile Sdk version: API 21</code>.</p>
  
  <p>My question is:</p>
  
  <p>What do I need to change so my app won't be affected?
  I have downloaded everything about <code>API 19</code> in Sdk manager, thanks for your help!</p>