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

Oliver Acevedo
Oliver Acevedo
4,338 Points

Logging integers?

I'm stuck on this code challenge. It says that I'm not logging it exactly how it's asking. I've tried to log "pages" as a string and as an integer and I still get the same error. When making the "pages" variable, I've tried the following things:

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

What am I doing wrong?

Finally, write a 'for' loop that loops through 'jsonBooks'. In each step of the loop, use 'getJSONObject(int index)' to get a JSONObject from the array. 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'.

Bummer! Make sure you write each book to the log exactly as specified in the instructions.

// 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");

for (int i = 0; i < jsonBooks.length(); i++) {
     JSONObject jsonBook = jsonBooks.getJSONObject(i);
      String title = jsonBooks.getString("title");
      String pages = jsonBooks.getString("pages");    

      Log.i("CodeChallenge", title + ", " + pages);
}
Gergő Bogdán
Gergő Bogdán
6,664 Points

Do you have a sample JSON object which you are parsing ? Could you please share that also ?

Oliver Acevedo
Oliver Acevedo
4,338 Points

Sure:

{ "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

Gergő Bogdán
Gergő Bogdán
6,664 Points

The field names inside your for loops are not correct, you are using jsonBooks instead of jsonBook when invoking getString() method.

Oliver Acevedo
Oliver Acevedo
4,338 Points

Holy cow, I can't believe I wasted all that time because of a little "s"... lol, thanks man. I hope my eyes will get better and finding those little mistakes. I appreciate the help!