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Android

Posted by MUZ141098 Tendai Matemera
MUZ141098 Tendai Matemera
4,318 Points

challenge 2 of task 2

Bummer! Your loop should run three times and call 'getJSONObject()' each time through.

// JSONObject 'jsonData' was loaded from data.json JSONArray jsonShows = jsonData.getJSONArray("jsonShows");

for (int i=0; i<jsonShows.length();i++){ JSONObject show = jsonShows.getJSONObject(i); String title = show.getString("title"); int pages = show.getInt("pages"); Log.i("CodeChallenge",title+","+pages); }

Help. how to make the code loop thrice as bummer wants.

6 Answers

Jon Kussmann
Jon Kussmann
Courses Plus Student 7,254 Points

I stated in a previous answer that you should try posting just the title in the log statement instead of title,page

I'll post my code here (it has passed the challenge): 

JSONArray jsonShows = jsonData.getJSONArray("shows");

for (int i=0; i<jsonShows.length();i++){ 
  JSONObject jsonData = jsonShows.getJSONObject(i); 
  String title = jsonData.getString("title"); 
  Log.i("CodeChallenge", title);
}
MUZ141098 Tendai Matemera
MUZ141098 Tendai Matemera
4,318 Points

Man you are a genius, it took a whole week to pass this challenge and you just made my coding hopeful.You are a star. thanks a lot. My apology for failing to to figure out what you meant regarding title and page on the log statement.Hats off man.

Farouk Charkas
Farouk Charkas
1,957 Points
Farouk Charkas
Farouk Charkas
1,957 Points

This might not be correct, because I am not in that stage yet, but, maybe change the 'if' statement to i != 3 and add 1 to i each time that runs

MUZ141098 Tendai Matemera
MUZ141098 Tendai Matemera
4,318 Points

did not solve the problem, thanks for the effort.

Farouk Charkas
Farouk Charkas
1,957 Points

Your Welcome!

Farouk Charkas
Farouk Charkas
1,957 Points

But, you could tag people like Jon Kussmann and Gloria Dwomoh, they are good at answering questions

Farouk Charkas
Farouk Charkas
1,957 Points

Oh yea and, it was very hard to read your code so maybe you can edit he code and add back-ticks like this one `. I is located under the "ESC" key and above the tab key. Add it before and after your code and, after the first set, type in java or the language your dealing with. JAVA for android

MUZ141098 Tendai Matemera
MUZ141098 Tendai Matemera
4,318 Points
MUZ141098 Tendai Matemera
MUZ141098 Tendai Matemera
4,318 Points

I still haven't found anyone who has passed the challenge yet.

MUZ141098 Tendai Matemera
MUZ141098 Tendai Matemera
4,318 Points

Thanks Evering, lem try and hook up with them. thanks once again for your assistance.

Jon Kussmann
PLUS
Jon Kussmann
Courses Plus Student 7,254 Points
Jon Kussmann
Jon Kussmann
Courses Plus Student 7,254 Points

Hi Tendai,

You might need to copy the data.json file here so I can check what data you are getting.

First try changing:

for (int i=0; i<jsonShows.length();i++)

To

for (int i=0; i < 3 ;i++)

It could be the length is greater than 3, but you only want the first 3 elements. I would need the data to know for sure. Also please post the original question.

MUZ141098 Tendai Matemera
MUZ141098 Tendai Matemera
4,318 Points

changing to for (int i=0;i<3;i++) results in error ' Bummer! java.lang.NullPointerException ()' however the original challenge is

Challenge Task 2 of 2

Finally, write a 'for' loop that loops through jsonShows. 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 show title. and my code is

// JSONObject 'jsonData' was loaded from data.json JSONArray jsonShows = jsonData.getJSONArray("jsonShows");

for (int i=0; i<jsonShows.length();i++){ JSONObject show = jsonShows.getJSONObject(i); String title = show.getString("title"); int pages = show.getInt("pages"); Log.i("CodeChallenge",title+","+pages); }

the output leads to Bummer! Your loop should run three times and call 'getJSONObject()' each time through. may you help in making the code loop run three times.

MUZ141098 Tendai Matemera
MUZ141098 Tendai Matemera
4,318 Points

// JSONObject 'jsonData' was loaded from data.json JSONArray jsonShows = jsonData.getJSONArray("jsonShows");

for (int i=0; i<3;i++){ JSONObject show = jsonShows.getJSONObject(i); String title = show.getString("title"); int pages = show.getInt("pages"); Log.i("CodeChallenge",title+","+pages); }

gives ; Bummer! java.lang.NullPointerException ()

Jon Kussmann
PLUS
Jon Kussmann
Courses Plus Student 7,254 Points
Jon Kussmann
Jon Kussmann
Courses Plus Student 7,254 Points

What if you used the your original code, but instead of putting the title and the pages in the log statement, you just put the titles?

MUZ141098 Tendai Matemera
MUZ141098 Tendai Matemera
4,318 Points

Challenge Task 2 of 2

Finally, write a 'for' loop that loops through jsonShows. 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 show title.

data.json

1 { 2 "name":"Netflix Playlist", 3 "shows":[ 4 { 5 "title":"Doctor Who", 6 "season":8, 7 "episode":3 8 }, 9 { 10 "title":"Arrow", 11 "season":1, 12 "episode":10 13 }, 14 { 15 "title":"Portlandia", 16 "season":4, 17 "episode":5 18 } 19 ] 20 } CodeChallenge.java; my code below

// JSONObject 'jsonData' was loaded from data.json JSONArray jsonShows = jsonData.getJSONArray("jsonShows");

for (int i=0; i<jsonShows.length();i++){ JSONObject jsonData = jsonShows.getJSONObject(i); String title = jsonData.getString("title"); int pages = jsonData.getInt("pages"); Log.i("CodeChallenge", title+","+pages); } output: Bummer! Your loop should run three times and call 'getJSONObject()' each time through.

Jon Kussmann
PLUS
Jon Kussmann
Courses Plus Student 7,254 Points
Jon Kussmann
Jon Kussmann
Courses Plus Student 7,254 Points 
 JSONArray jsonShows = jsonData.getJSONArray("jsonShows");

Should be :

 JSONArray jsonShows = jsonData.getJSONArray("shows");

I hope that helps.

MUZ141098 Tendai Matemera
MUZ141098 Tendai Matemera
4,318 Points

oooh that part is ok and is for the first challenge and has already passed that one. the issue is on the second challenge where the for loop has to run thrice calling the 'getJSONObject(int index)' each time through. thats where my issue since no errors from my code are being picked by the editor but saying has to run thrice. maybe if you could help startig from the for loop.