Retrieve data from JSON Java Android

Question

i've got a problem to retrieve information by a JSON

The Raw Json is this

{"date":"{\"yesterday\":\"Wed 28\",\"today\":\"Thu 29\",\"tomorrow\":\"Fri 30\"}"

Now how i could take this Json and format in this?

{
    "date":{
        "yesterday":"Wed 28",
        "today":"Thu 29",
        "tomorrow":"Fri 30"
    }
}

And then retry the date from the key?

            String jsonStr = sh.makeServiceCall(url); 
            Log.e("RAW-JSON: ","Retrieve RAW-Json is "+jsonStr);

            if (jsonStr != null) {
                try {
                    JSONObject jsonObj = new JSONObject(jsonStr);
                    JSONArray DATESTRING = jsonObj.getJSONArray("date");
                    JSONObject d = DATESTRING.getJSONObject(0);
                    String Ieri = d.getString("yesterday");
                    Log.e("DATE-JSON", "Retrieve DATE-Json is " + yesterday);
                } catch (JSONException e) {
                    Log.e("ERROR", "Not a good result.");
                    e.printStackTrace();
                }
            }

Alex Bean · Accepted Answer · 2018-03-29 15:24:56Z

2

I would strongly recommend use the library Gson to parse a JSON document, is much easier and elegant.

public static date  parseJSON(String jsonArray) {
    date yourDate = new date();
    try {
        yourDate = (gson.fromJson(jsonArray, date.class));

    } catch (Exception e) {
        e.printStackTrace();
    }
    return yourDate;
}

Then the class date is just a class with the same elements that exists in the JSON you want to read in your case:

public class date {
    private String yesterday;
    private String today;
    private String tomorrow;

}

answered Mar 29, 2018 at 15:24

Alex Bean

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Comments

Andrea Radice · Accepted Answer · 2018-03-29 15:25:40Z

0

JSONArray DATESTRING = jsonObj.getJSONArray("date") is wrong because "date" is not an JsonArray but an JsonObject!

answered Mar 29, 2018 at 15:25

Andrea Radice

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4 Comments

Trusted Over a year ago

Ok how can i retrieve data? Exists some java class where if i give the key they return the argument of Json?

Andrea Radice Over a year ago

jsonObj.getJSONObject("date").getString("today");

Trusted Over a year ago

Value {"yesterday":"Wed 28","today":"Thu 29","tomorrow":"Fri 30"} at date of type java.lang.String cannot be converted to JSONObject

Trusted Over a year ago

Unterminated object at character 12 of all of the rest of my json

catchiecop · Accepted Answer · 2018-03-29 15:29:59Z

0

What you probably need to do is (assuming you want today's date):

String todaysDate = jsonObj.getJSONObject("date").getString("today");

answered Mar 29, 2018 at 15:29

catchiecop

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2 Comments

Trusted Over a year ago

i've got this exc org.json.JSONException: Value {"yesterday":"Wed 28","today":"Thu 29","tomorrow":"Fri 30"} at date of type java.lang.String cannot be converted to JSONObject

catchiecop Over a year ago

what if you get rid of the escape chars and create a new object? like there has been stated do this : jsonStr = jsonStr.replace("\\\"", "\""); JSONObject jsonObj = new JSONObject(jsonStr); and then what I told you will probably work.

Arnav Rao · Accepted Answer · 2018-03-29 15:35:37Z

0

Just simply replace \" with " to get clean json string and then parse the json to read data usig JSONObjct.

jsonStr = jsonStr.replace("\\\"", "\"");
JSONObject jsonObj = new JSONObject(jsonStr);

answered Mar 29, 2018 at 15:35

Arnav Rao

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