Android- Create JSON Array and JSON Object

Android- create JSON Array and JSON Object

Use the following code:

JSONObject student1 = new JSONObject();
try {
    student1.put("id", "3");
    student1.put("name", "NAME OF STUDENT");
    student1.put("year", "3rd");
    student1.put("curriculum", "Arts");
    student1.put("birthday", "5/5/1993");

} catch (JSONException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

JSONObject student2 = new JSONObject();
try {
    student2.put("id", "2");
    student2.put("name", "NAME OF STUDENT2");
    student2.put("year", "4rd");
    student2.put("curriculum", "scicence");
    student2.put("birthday", "5/5/1993");

} catch (JSONException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}


JSONArray jsonArray = new JSONArray();

jsonArray.put(student1);
jsonArray.put(student2);

JSONObject studentsObj = new JSONObject();
    studentsObj.put("Students", jsonArray);



String jsonStr = studentsObj.toString();

    System.out.println("jsonString: "+jsonStr);

Create json array format in android

Here is code:

  try {
        JSONObject jsonObject = new JSONObject();
        JSONArray array = new JSONArray();
        int[] dataArray = {1,2,3,4,5};
        for( int i=0;i<dataArray.length;i++) {
            JSONObject internalObject = new JSONObject();
            internalObject.put("contact_id",dataArray[i]);
            array.put(internalObject);

        }
        jsonObject.put("contact_approve", array);

        System.out.print(jsonObject);
        Log.v("JsonObject",jsonObject.toString());
    } catch (JSONException e) {
        e.printStackTrace();
    }

Thanks

How to create JSON Array with Loop Data in Android

JSONArray jsa = new JSONArray();
for (int i = 1; i<= 20; i++) {
  JSONObject cust = new JSONObject();
  cust.put("number",String.valueOf(i));
  cust.put("name","customer"+i);
  cust.put("url","url"+i);
  jsa.put(cust);
}
System.out.println(jsa.toString());

Add JSONArray to JSONObject in android

        JSONObject object = new JSONObject();
        try {
            // create multiple object
            JSONObject obj1 = new JSONObject();
            obj1.put("targetId", 1);
            obj1.put("celsius", 34.5);
            obj1.put("measuredTime", "2021-03-25,11:40:01");
            obj1.put("isFirst", true);

            // add all created object in array
            JSONArray array = new JSONArray();
            array.put(obj1);

            // add array in main object
            object.put("infos" , array);
        } catch (JSONException e) {
            e.printStackTrace();
        }

How to create Json using JsonArray and JsonObject

    JSONObject obj = new JSONObject();
    JSONArray req = new JSONArray();

    JSONObject reqObj = new JSONObject()
    reqObj.put( "ctrlId", "txt1" );
    req.put( reqObj );
    reqObj = new JSONObject();
    reqObj.put( "ctrlId", "txt2" );
    req.put( reqObj );

    obj.put( "req", req );

The final object is obj

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