How to parse JSON Array Not Json Object in Android

Question

I have a trouble finding a way how to parse JSONArray  It looks like this      name   name1   url   url1     name   name2   url   url2          I  know how to parse it if the JSON was written differently  In other words  if I had json object returned instead of an array of objects    But it s all I have and have to go with it    EDIT  It is a valid json  I made an iPhone app using this json  now I need to do it for Android and cannot figure it out  There are a lot of examples out there  but they are all JSONObject related  I need something for JSONArray   Can somebody please give me some hint  or a tutorial or an example   Much appreciated

User · Accepted Answer

use the following snippet to parse the JsonArray.

JSONArray jsonarray = new JSONArray(jsonStr);
for (int i = 0; i < jsonarray.length(); i++) {
    JSONObject jsonobject = jsonarray.getJSONObject(i);
    String name = jsonobject.getString("name");
    String url = jsonobject.getString("url");
}

Hope it helps.

User · Answer

My case  Load From Server Example    int jsonLength   Integer parseInt jsonObject getString  number of messages                 if  jsonLength    1                    for  int i   0  i  lt  jsonLength  i                          JSONArray jsonArray   new JSONArray jsonObject getString  messages                         JSONObject resJson    JSONObject  jsonArray get i                         addItem resJson getString  message    resJson getString  name    resJson getString  created at                         Hope it help

User · Answer

Stebra See this example  This may help you       public class CustomerInfo            SerializedName  customerid       public String customerid       SerializedName  picture       public String picture        SerializedName  location       public String location       public CustomerInfo              And when you get the result  parse like this  List lt CustomerInfo gt  customers   null  customers    List lt CustomerInfo gt  gson fromJson result  new TypeToken lt List lt CustomerInfo gt  gt       getType

User · Answer

Create a class to hold the objects   public class Person     private String name     private String url       Get  amp  Set methods for each field     Then deserialize as follows   Gson gson   new Gson    Person   person   gson fromJson input  Person   class     input is your String   Reference Article  http   blog patrickbaumann com 2011 11 gson-array-deserialization

User · Answer

Old post I know  but unless I ve misunderstood the question  this should do the trick   s       name   name1   url   url1     name   name2   url   url2      eval  array     s   for  var i   0  i  lt  array length  i      for  var index in array i         alert array i  index

User · Answer

In this example there are several objects inside one json array  That is   This is the json array     name   name1   url   url1     name   name2   url   url2         This is one object    name   name1   url   url1    Assuming that you have got the result to a String variable called jSonResultString   JSONArray arr   new JSONArray jSonResultString        loop through each object   for  int i 0  i lt arr length    i        JSONObject jsonProductObject   arr getJSONObject i     String name   jsonProductObject getString  name      String url   jsonProductObject getString  url

User · Answer

URL url   new URL  your URL                connection    HttpURLConnection  url openConnection                connection connect                InputStream stream   connection getInputStream                BufferedReader reader              reader   new BufferedReader new InputStreamReader stream                StringBuffer buffer   new StringBuffer                String line                   while   line   reader readLine       null                    buffer append line                                setting the json string             String finalJson   buffer toString                   this is your string get the pattern from buffer              JSONArray jsonarray   new JSONArray finalJson

User · Answer

public static void main String   args  throws JSONException       String str        name     name1     url     url1       name     name2     url     url2            JSONArray jsonarray   new JSONArray str         for int i 0  i lt jsonarray length    i             JSONObject obj   jsonarray getJSONObject i            String name   obj getString  name            String url   obj getString  url             System out println name           System out println url                   Output   name1 url1 name2 url2

User · Answer

A few great suggestions are already mentioned  Using GSON is really handy indeed  and to make life even easier you can try this website It s called jsonschema2pojo and does exactly that   You give it your json and it generates a java object that can paste in your project  You can select GSON to annotate your variables  so extracting the object from your json gets even easier

User · Answer

I ll just give a little Jackson example   First create a data holder which has the fields from JSON string     imports         JsonIgnoreProperties ignoreUnknown   true  public class MyDataHolder        JsonProperty  name       public String mName        JsonProperty  url       public String mUrl      And parse list of MyDataHolders  String jsonString      your json ObjectMapper mapper   new ObjectMapper    List lt MyDataHolder gt  list   mapper readValue jsonString       new TypeReference lt ArrayList lt MyDataHolder gt  gt           Using list items  String firstName   list get 0  mName  String secondName   list get 1  mName

User · Answer

Create a POJO Java Class for the objects in the list like so   class NameUrlClass         private String name         private String url           Constructor        public NameUrlClass String name String url                 this name   name                this url   url                 Now simply create a List of NameUrlClass and initialize it to an ArrayList like so   List lt NameUrlClass gt  obj   new ArrayList lt NameUrlClass gt     You can use store the JSON array in this object  obj   JSONArray      name   name1   url   url1    name   name2   url   url2

[java] How to parse JSON Array (Not Json Object) in Android

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