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Android

Posted by Jaime Betancourt
Jaime Betancourt
1,927 Points

I need help with a quiz question.

I have been working on a task three of one of the quizzes and i have not been able to answer it. here is what it is asking.

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'.

and here is what i have.

// 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 books = jsonBooks.getJSONObject(i); string title = books.getString("title"); String page = books.getString("pages"); Log.i("CodeChallenge", title + ", " + page); }

Silpa Nanduri
Silpa Nanduri
647 Points

I get the same error too.

2 Answers

Jaime Betancourt
Jaime Betancourt
1,927 Points
Jaime Betancourt
Jaime Betancourt
1,927 Points

i have been working on it and i have even checked the video a few times but i still dont get it right. i rewrote the code.

// 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 index = 0; index < jsonBooks.length(); index++){ JSONObject jsonPost = jsonBooks.getJSONObject(index); String title = jsonPost.getString("title"); String page = jsonPost.getString("pages"); Log.i("CodeChallenge", title + ", " + page);

}

Now i get a different error message

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

Silpa Nanduri
Silpa Nanduri
647 Points

Found the answer in one of the posts. Here it is https://teamtreehouse.com/forum/i-cant-get-through-the-last-challenge-of-parsing-data-returned-in-json-format

Jaime Betancourt
Jaime Betancourt
1,927 Points

thank you so much.

Silpa Nanduri
Silpa Nanduri
647 Points

Oops that didn't work either.

Silpa Nanduri
Silpa Nanduri
647 Points

I get this error now.

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

This is my code:

for(int i=0; i< jsonBooks.length(); i++){ JSONObject book = jsonBooks.getJSONObject(i); Log.i("CodeChallenge",book.getString("title")+", "+book.getString("pages")); }

Ben Jakuben
Ben Jakuben
Treehouse Teacher
Ben Jakuben
Ben Jakuben
Treehouse Teacher

Hi Silpa,

Check out the discussion in that linked post and it should highlight the error in your code. :)

Jaime Betancourt
Jaime Betancourt
1,927 Points
Jaime Betancourt
Jaime Betancourt
1,927 Points

that is weird because i just took the quiz again and used your code but it worked for me. maybe you should just go ahead and copy the code from the forum you found.