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Question by Heissayen · Dec 10, 2015 at 11:22 AM · androidjsondatawww classdeserialize

Deserialize JSON data for android via WWW (JsonUtility / JsonFX)

So I have to deserialize data from a file. It works fine for Windows and Mac, but doesnt for Android or iOS.

This is the code I have for Windows:

 public void LoadAndDeserialize()
 {
             var streamReader = new StreamReader(PATH);
             data = streamReader.ReadToEnd();            
             streamReader.Close();
 
             questions = JsonUtility.FromJson<Questions> (data);
 }

It works perfectly. Either with JSONFX or new JsonUtilities. And this is the code I have for Android:

 public void LoadAndDeserialize()
     {    
                 WWW adata = new WWW(PATH);
                 while ( !adata.isDone) {}
     
                 var streamReader = new StreamReader(adata.text);
     
                 data = streamReader.ReadToEnd();
                 streamReader.Close();
     
                 questions = JsonUtility.FromJson<Questions> (data);
     }


I also tried deserializing directly from WWW:

 questions = JsonUtility.FromJson<Questions> (adata.text);

But it wont work either. So, what Im doing wrong? Whats the way to deserialize data for Android?

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avatar image superpig ♦♦ · Jan 12, 2016 at 02:50 PM 0
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What does your 'Questions' type definition look like?

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Answer by Heissayen · Jan 12, 2016 at 03:11 PM

I managed to work around the problem by storing the data on Resources folder and loading the asset as TextAsset.

Someone suggested I needed to use Trim() in order to get it to work with WWW.

Here's the post and the answers in detail: https://www.reddit.com/r/Unity3D/comments/3w7mhx/deserialize_json_data_for_android_via_www/

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Answer by Heissayen · Dec 10, 2015 at 02:03 PM

What I mean with "wont work" is: when I try to assign each field of Questions (Question text, answers..) to a GUI text I get a NullReferenceException: Object reference not set to an instance of an object. This does not happen for windows, and I'm assuming something is not working properly with the deserialization from WWW.

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