title: Open drawable resource from string
body: <p>I need to get a resource from a String:</p>
  
  <p>What i do: </p>
  
  <pre><code>InputStream is = ctx.getResources().openRawResource(R.drawable.image1);
  </code></pre>
  
  <p>What i need:</p>
  
  <pre><code>InputStream is = ctx.getResources().openRawResource(getDrawable("image1"));
  </code></pre>
  
  <p>Anyone knows how to implement getDrawable() funcion?</p>
  
  <p>Thanks!</p>