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Android Build a Blog Reader Android App Getting Data from the Web Parsing Data Returned in JSON Format

Posted by Shubham Agrawal
Shubham Agrawal
7,169 Points

Challenge 3 of 3 - Code not working.

Please help, I know some silly detail is missing.

JSONChallenge.java 
// JSONObject 'jsonData' was loaded from data.json
//private static final String TAG = "CodeChallenge";
String name = jsonData.getString("name");
String publisher = jsonData.getString("publisher");
String language = jsonData.getString("language");
//"CodeChallenge"

JSONArray jsonBooks = jsonData.getJSONArray("Books");

for (int i = 0; i < jsonBooks.length(); i++) {
  JSONObject jsonBook = jsonBooks.getJSONObject(i);
  String pages = jsonBook.getString("pages");
  String title = jsonBook.getString("title");
  Log.i("CodeChallenge", "'"+title+" "+(i+1)+", "+pages+"'."); 
}
data.json 
{
    "name":"Treehouse Book Series",
    "publisher":"Wiley",
    "language":"English",
    "books":[
        {
            "title":"HTML5 Foundations",
            "author":"Matt West",
            "pages":384
        },
        {
            "title":"CSS3 Foundations",
            "author":"Ian Lunn",
            "pages":352
        }
    ]
}

2 Answers

Jack Middlebrook
Jack Middlebrook
19,746 Points
Jack Middlebrook
Jack Middlebrook
19,746 Points

Yep just a small error. It looks like the first issue is in this line:

JSONArray jsonBooks = jsonData.getJSONArray("Books");

The data.json has "books" with a lowercase b so change it to:

JSONArray jsonBooks = jsonData.getJSONArray("books");

I tried running your code and you will also need to change your Log.i statement. The output just needs to be "book title, pages" without the quotes so the Log.i should look like:

Log.i("CodeChallenge", title + ", " + pages);
haunguyen
haunguyen
14,985 Points
haunguyen
haunguyen
14,985 Points

"pages" is an int value

use getInt