Json Parsing from Url In Android , Not working

You are using getString on "ID" when you should be using getInt. I tested the JSON string you provided in your question. The following code works:

java

String json =
    "[{\"ID\":4,\"Name\":\"Vinoth\",\"Contact\":\"1111111111\",\"Msg\":\"1\"},{\"ID\":5,\"Name\":\"Mani\",\"Contact\":\"22222222\",\"Msg\":\"1\"},{\"ID\":6,\"Name\":\"Manoj\",\"Contact\":\"33333333333\",\"Msg\":\"1\"}]";
try {
  JSONArray jsonArray = new JSONArray(json);
  for (int i = 0, len = jsonArray.length(); i < len; i++) {
    JSONObject jsonObject = jsonArray.getJSONObject(i);
    int id = jsonObject.getInt("ID");
    String name = jsonObject.getString("Name");
    String contact = jsonObject.getString("Contact");
    String msg = jsonObject.getString("Msg");
    System.out.println("id=" + id + ", name='" + name + "\', contact='" + contact + "\', msg='" + msg);
  }
} catch (JSONException e) {
  e.printStackTrace();
}

Output from running the above code:

id=4, name='Vinoth', contact='1111111111', msg='1

id=5, name='Mani', contact='22222222', msg='1

id=6, name='Manoj', contact='33333333333', msg='1

If you are still getting an error, post the stacktrace.