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

drizzy drake
PLUS
drizzy drake
Courses Plus Student 2,469 Points
Posted by drizzy drake
drizzy drake
Courses Plus Student 2,469 Points

I can't figure out why This isn't working. Please help

i've been looking at it for more than an hour but still can't see my mistake

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

JSONArray jsonBooks = jsonData.getJSONArray("books");
//JSONObject jsonBooks = new JSONObject("books");

for(int i = 0; i < jsonBooks.length(); i++){
  JSONObject jsonBook = jsonBooks.getJSONObject(i); //i tried int index

  String title = jsonBooks.getString("title");
  String pages = jsonBooks.getString("pages");
  Log.i(CodeChallenge, " "+title +" "+i+" "+ 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
        }
    ]
}

1 Answer

Ken Alger
STAFF
Ken Alger
Treehouse Teacher
Ken Alger
Ken Alger
Treehouse Teacher

Drizzy:

A couple of things...

First, your creating a jsonBook object, and referencing jsonBooks in your attempts to get strings. That "s" on the end is creating an issue.

Second, in your line of code:

String pages = jsonBooks.getString("pages");

The data for pages is not a string it is an int, so we need to change that to:

int pages = jsonBooks.getInt("pages");

Thirdly, the formatting for your output to the log is not what the challenge engine is wanting. The instructions are calling for it to be formatted: Then use the 'Log.i()' method (with "CodeChallenge" as the tag) to write the book title, a comma, a space, and the number of pages. Ex. output: 'Book title 1, 300'.

That would look similar to:

Log.i("CodeChallenge", title + ", " + pages);

Hope that helps a bit, post back if it does not.

Happy coding,

Ken