title: How do I access a node in json
body: <p>i want to access in a node that contains an url my json structure is the following</p>
  
  <pre><code>{
      "product": {
          "name": "myApp",
          "config": [
              {
                  "grade": "first",
                  "courses": [
                      {
                          "name": "Math",
                          "url": "example.com"
                      }
                  ]
              }
          ]
      }
  }
  </code></pre>
  
  <p>Recently i could access to a lot of nodes for example grade:first,second,third etc, and i generate a listview with an adapter, then i touch an item for example first and it send me to another activity that contains courses, i create the same structure to access in courses, but when i want to access to the url for each grade it sent me to the last url how can i access to the specific url? sorry for my english</p>