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?

petey · Accepted Answer · 2012-12-28 15:23:20Z

64

use a simple String function/method like

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

answered Dec 28, 2012 at 15:23

petey

17.2k6 gold badges70 silver badges103 bronze badges

Sign up to request clarification or add additional context in comments.

8 Comments

ralphgabb Over a year ago

you can also return jsonArray.toString().contains( usernameToFind ); for a cleaner and shorter solution.

Thermometer Over a year ago

Sorry but this is i.m.o. a bad solution. What if a username contains partly another username? So if you have "Anja" as a username to find, but another user is called "Anjatovic". It would lead to inaccurate results.

petey Over a year ago

@Thermometer this is why the code answer looks for start and end quotes.

Thermometer Over a year ago

Woops, totally missed that, my bad!

isKrishnaK Over a year ago

Is it possible to get an Index of an object from array that has matched?

|

Collectives™ on Stack Overflow

Check JSONArray for specific value

1 Answer 1

8 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

8 Comments

Your Answer

Sign up or log in

Post as a guest

Related