How to get value by key from JSON?
<p>JSON looks like:</p>

<pre><code>{  
   "cover":"blabla.jpg",
   "content":[  
      {  
         "article":"article_text",
         "document":"document_text"
      }
   ]
}
</code></pre>

<p>I know how to get <code>"cover"</code>:</p>

<pre><code>JSONObject json = new JsonObject(jsonStr);
json.get("cover");
</code></pre>

<p>But how can I get value by <code>"article"</code> key?</p>