title: Call requires API level 16 (current min is 14)
body: <p>I have this line in my code:</p>
  
  <pre><code>linearLayout.setBackground(drawable);
  </code></pre>
  
  <p><code>setBackground()</code> shows the following error:</p>
  
  <blockquote>
    <p>Call requires API level 16 (current min is 14)</p>
  </blockquote>
  
  <p>What does this mean? </p>
  
  <p>Can I raise my API level? </p>
  
  <p>What does a higher/lower API level mean? </p>
  
  <p>Does it limit the amount of devices my app can be used on if the API level is higher?</p>