How to loop through JSON and convert it into Java object

Question

I'm looking for a good way to loop through JSON object. Looking for example how to do so. Any help is welcome. Need to convert it into Java object. I have read that best way is to use GSON, but could achieve the right result.

{  
   "countries":[  
      {  
         "MobileCountry":{  
            "id":2,
            "name":"England",
            "languages":[  
               {  
                  "MobileLanguage":{  
                     "code":"en",
                     "name":"English"
                  }
               },
               {  
                  "MobileLanguage":{  
                     "code":"ru",
                     "name":"Russian"
                  }
               }
            ],
            "mobile_code":"+60",
            "currency_code":"EUR",
            "regions":[  
               {  
                  "MobileRegion":{  
                     "region_id":2048,
                     "name":"trr"
                  }
               },
               {  
                  "MobileRegion":{  
                     "region_id":1024,
                     "name":"Wonderland"
                  }
               }
            ]
         }
      },
      {  
         "MobileCountry":{  
            "id":1,
            "name":"Spain",
            "languages":[  
               {  
                  "MobileLanguage":{  
                     "code":"esp",
                     "name":"Spanish"
                  }
               },
               {  
                  "MobileLanguage":{  
                     "code":"en",
                     "name":"English"
                  }
               }
            ],
            "mobile_code":"+456",
            "currency_code":"EUR",
            "regions":[  
               {  
                  "MobileRegion":{  
                     "region_id":1,
                     "name":"region_1"
                  }
               },
               {  
                  "MobileRegion":{  
                     "region_id":8,
                     "name":"region_2"
                  }
               },
               {  
                  "MobileRegion":{  
                     "region_id":32,
                     "name":"Region1"
                  }
               },
               {  
                  "MobileRegion":{  
                     "region_id":64,
                     "name":"GaBus"
                  }
               }
            ]
         }
      }
   ]
}

possible duplicate of [How to parse JSON in Android](http://stackoverflow.com/questions/9605913/how-to-parse-json-in-android) — njzk2, Jan 08 '15 at 18:10

score 1 · Answer 1 · answered Jan 08 '15 at 18:01

1

Use JSONObject:

String rawJson = "...."; //escape your string if needed!
JSONObject json = new JSONObject(s);

answered Jan 08 '15 at 18:01

bonnyz

13,458
5
46
70

score 0 · Answer 2 · edited May 23 '17 at 10:33

0

Could do more research and post your code to get more useful feedback.

duplicate: How to parse JSON in Android

android has a class for this: http://developer.android.com/reference/android/util/JsonReader.html

edited May 23 '17 at 10:33

Community

1
1

answered Jan 08 '15 at 18:01

SBC

112
7

score 0 · Answer 3 · answered Jan 08 '15 at 18:07

This is really a broad question, but I'll try to give an overview of a simple implementation of GSON.

In short GSON is:

Gson is a Java library that can be used to convert Java Objects into their JSON representation. It can also be used to convert a JSON string to an equivalent Java object. Gson can work with arbitrary Java objects including pre-existing objects that you do not have source-code of.

Download Gson and add it to your build path. Then, import it to your project:

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

Create Gson object to work with:

Gson gson = new GsonBuilder().create();

Then you can create the JSON by simply passing the object into Gson's toJson() method:

gson.toJson(Object);

Or, you could 'consume' a JSON object to create an object back from JSON using the fromJson() method. This works with primitives, or you specify the class the JSON to deserialize into:

Person p = gson.fromJson(reader, Person.class);

Alternatives

You might want to also check out JSONObject. It looks like it is explicitly referenced in the Android documentation. That library is also pretty popular.

How to loop through JSON and convert it into Java object

3 Answers3