在TextView中显示json响应

Question

I have a Json response :

{
    "action":"true",
        "0":{
    "_id":"58ca7f56e13823497175ee47"
    }
}

and I want to show the _id value in a TextView .

I tried this :

    StringRequest stringRequest = new StringRequest(Request.Method.POST, reg_url, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            try {
                JSONObject object = new JSONObject(response);
                JSONArray Jarray  = object.getJSONArray("0");
                String message = object.getString("_id");

                txtstorename.setText(message);

I can see Json response in Android Monitor but I got nothing in my TextView ! what is the problem?

Answer 1

This will be the correct way

JSONObject object = new JSONObject(response);
JSONObject object1 = object.get("0");
String message = object1.get("_id");
txtstorename.setText(message);

Answer 2

StringRequest stringRequest = new StringRequest(Request.Method.POST, reg_url, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            try {
                JSONObject object = new JSONObject(response);
                JSONObject jsonObj= object.getJSONObject("0");
                String message = jsonObj.getString("_id");    
                txtstorename.setText(message);

Answer 3

You are getting JsonObject into JsonArray . thats why there is problem.

replace this line:

JSONArray Jarray  = object.getJSONArray("0");

with This

JsonObject jsonObject = object.getJSONObject("0");

Answer 4

When receiving JSON Object as response use JsonObjectRequest instead of StringRequest

JsonObjectRequest request= new JsonObjectRequest(Request.Method.POST,url, null,new Response.Listener<JSONObject>(){@Override
    public void onResponse(JSONObject response) {
        try {
            JSONObject jsonObj= response.getJSONObject("0");
            String message = jsonObj.getString("_id");    
            txtstorename.setText(message);},null);

Answer 5

You have to use getJSONObject("0") instead of getJSONArray because 0 is not an array. An array would be indicated by [ /* stuff here */ ] , which you do not have.

You have a Json object containing action and 0 , action is a String, and 0 is an object.

In the 0 object you then have an _id field which you are trying to access.

---

So in your case something like the following:

// get the object
JSONObject object0  = object.getJSONObject("0");
String message = object0.getString("_id");