Check JSONArray for specific value

Question

In my Android Activity I am getting a JSONArray via HTTP containg usernames. The Array looks like this:

[{"username":"Julia"},{"username":"Anja"},{"username":"Hans"},{"username":"Sophia"},{"username":"Sarah"}] 

I want to check in the Android Activity if a given username already exists.

What would be the most efficient way to do it? Or do I have to iterate over the whole array?

Answer 1

use a simple String function/method like

private boolean userexists(JSONArray jsonArray, String usernameToFind){     return jsonArray.toString().contains("\"username\":\""+usernameToFind+"\""); }