How to Read certain values from a String in Android

Question

I'm developing an android application where I'm reading results from an online database to a string of this form:

{"success":1,"innerResult":[{"username":"raafat","password":"123"}]}

I need to be able to read only the username and password values even when I have more than one result. For example i need an array of usernames returned and another array of passwords.

I tried splitting the string but it's confusing when you have many entries.

it's a `JSON` String...use a JSON parser to parse the String — Abhishek, Jul 10 '15 at 08:07
this is what you`re looking for: http://stackoverflow.com/questions/9605913/how-to-parse-json-in-android — Fixus, Jul 10 '15 at 08:09

Bastien Viatge · Accepted Answer · 2015-07-10T08:19:16.473

3

Your string is in Json format, you can try something like that :

try{
    JSONObject yourObject = new JSONObject(yourString);
    int resultCode = yourObject.getInt("success");
    JSONArray innerResult = yourObject.getJSONArray("innerResult");
    //you'll need to iterate through your array then
    List<String> userNames = new ArrayList<>();
    List<String> passwords = new ArrayList<>();
    for(int i =0 ; i < innerResult.length() ; i++){
        JSONObject user = innerResult.getJSONObject(i);
        userNames.add(user.getString("username"));
        passwords.add(user.getString("password"));
    }
}catch(JSONException e){
   e.printStackTrace();
}

Or you can use library like GSon !

edited Jul 10 '15 at 08:19

answered Jul 10 '15 at 08:13

Bastien Viatge

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I still don´t get why you feed code to this monks – eduyayo Jul 10 '15 at 08:21
I still don't get why i'm the only one to be criticized – Bastien Viatge Jul 10 '15 at 08:48
understand "you" as a plural. In Spanish we say "vosotros". I cannot go repeating comments around without touching the sensibilities of administrators all around. Sorry. – eduyayo Jul 10 '15 at 08:50
Thank you so much Bastien. Maybe my question was trivial but I'm totally new to java and you helped a lot. – Rabah Hamzah Jul 10 '15 at 09:14
no problem ! happy to help – Bastien Viatge Jul 10 '15 at 09:17

score 2 · Answer 2 · answered Jul 10 '15 at 08:12

Use Gson.

Step 1: Creating bean of response data. In your case you want details of Username and Password.

public class User {
    private String username;
    private String password;
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
}

Step 2: Parse JSON response and using Gson convert it to your desired bean.

String response = "{\"success\":1,\"innerResult\":[{\"username\":\"raafat\",\"password\":\"123\"}]}";
JSONObject jsonObject = new JSONObject(response);

if(jsonObject.has("innerResult")){
   Type type = new TypeToken<List<User>>() {}.getType();
   List<User> listUsers = new Gson().fromJson(jsonObject.getJSONArray("innerResult").toString(), type);
}

How to Read certain values from a String in Android

2 Answers2