Parsing json with android

Question

Hi I want to parse this json:

[{
    \"codError\": 0,
    \"msg\": \"OK\"
}, {
    \"id\": 1,
    \"role\": {
        \"id\": 4,
        \"name\": \"Super\",
            


        

Answer 1

{ represents the Jsonobject and [ represents the jsonarray

Parse like this to get the role_id loginName from your json

 JSONArray jsonarr =new  JSONArray(yourstring);
 JSONObject jobj=jsonarr.getJSONObject(1);
 JSONObject role =jobj.getJSONObject("role");
 String role_id = role.getInt("id");
 String loginName=jsonarr.getString("loginName");

Answer 2

Why should we do parsing of JSON if you are provided a ready made tool to parse a JSON and give you a complete hierarchy of Java classes???

Right??

Take a look at JsonSchema 2 Pojo site.

Provide your JSON input/output there. Select appropriate options like

Source type: JSON
Annotation style: GSON

Enable following 3 options

1. Generate builder methods
2. Use primitive types
3. Use long integers

Select Jar button and you are done with.

Note

Please validate your JSON first.

Answer 3

First of all, the U4 doesn't seems JSON correct. I would have write it like:

{
  "your array":["U4"]
}

then use the method to get your array

JSONArray array = jsonObj.getJSONArray("your array");

then you can access the values on your JSONArray by iterating over it, like that

for (int i = 0; i < array.length(); i++) {
  array.getJSONObject(i);
}

Hope I help

Answer 4

Try out as below:

JSONArray arry=new JSONArray("yourjsonstring");
for(int i=0;i<arry.length();i++)
 {
      JSONObject obj=arry.getJSONObject(i);
     String role=obj.getString("role");
     JSONObject obj2=new JSONObject(role);
      String id=obj2.getString("id");
     JSONArray array =obj.getJSONArray("U4");
 } 

Hope this helps you.