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

Jason Roe
Jason Roe
1,257 Points

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'.

// 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++) { jsonBooks.getJSONObject(i); String title = jsonBooks.getString("title"); String pages = jsonBooks.getString("pages"); Log.i("CodeChallenge", title + ", " + pages);


2 Answers

Jonathan Baker
Jonathan Baker
2,304 Points

I'll admit that the task description is a little confusing on what you should be doing and leaves out a crucial step. What it fails to mention is the "title" and "pages" are attributes on each book that you retrieve from the jsonBooks array, and are not on the array itself.

Inside the for loop that you have, you simply need to add a JSONObject variable that points to the current book in the array, and then ask that specific JSONObject for the "title" and "pages" attributes.

JSONArray jsonBooks = jsonData.getJSONArray("books");
for (int i = 0; i < jsonBooks.length(); i++) {
    JSONObject book = jsonBooks.getJSONObject(i);
    // Retrieve and print title and page count attributes
    // from the book object using the #getString() method
    // and print them accordingly.
Jason Roe
Jason Roe
1,257 Points

got it! Thank you!