how to get the default HTTP USER AGENT from the android device?

Question

How to get the default HTTP USER AGENT and its default settings from the android device?

thanks
Nohsib

score 37 · Answer 1 · edited Apr 07 '15 at 07:14

as Varundroid mentioned in his answer,

String userAgent = System.getProperty("http.agent");

is better way to do it for Android 2.1 and above.

====================

From android source code.

public static String getDefaultUserAgent() {
    StringBuilder result = new StringBuilder(64);
    result.append("Dalvik/");
    result.append(System.getProperty("java.vm.version")); // such as 1.1.0
    result.append(" (Linux; U; Android ");

    String version = Build.VERSION.RELEASE; // "1.0" or "3.4b5"
    result.append(version.length() > 0 ? version : "1.0");

    // add the model for the release build
    if ("REL".equals(Build.VERSION.CODENAME)) {
        String model = Build.MODEL;
        if (model.length() > 0) {
            result.append("; ");
            result.append(model);
        }
    }
    String id = Build.ID; // "MASTER" or "M4-rc20"
    if (id.length() > 0) {
        result.append(" Build/");
        result.append(id);
    }
    result.append(")");
    return result.toString();
}

This is good, but if the scheme changes in future devices then it may not be accurate. — Oleg Vaskevich, Jan 29 '14 at 18:42
The scheme is a spec, so you can add any values to it as long as it conforms the spec. — Prakash Nadar, Jan 30 '14 at 00:57

Oleg Vaskevich · Accepted Answer · 2015-02-03T21:53:18.957

10

Edit: See Prakash's answer, which is better for 2.1+.

Try http://developer.android.com/reference/android/webkit/WebSettings.html#getUserAgentString

Note that this User Agent will only apply for the embedded WebKit browser that's used by default in Android. Unfortunately, you'll need to create a new WebView object to get the user agent. Fortunately, the user agent doesn't change often, so you should only need to run this code once in your application lifetime (unless don't care about performance). Just do:

String userAgent = new WebView(this).getSettings().getUserAgentString();

Alternatively, you can use the JavaScript method navigator.getUserAgent().

edited Feb 03 '15 at 21:53

answered Jul 26 '11 at 02:38

Oleg Vaskevich

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Thankyou Oleg, if you could kindly share some code snippet on the same, would help. – Nohsib Jul 26 '11 at 03:08
1

Alright, I edited my response. (And next time, don't forget to do a search first.) – Oleg Vaskevich Jul 26 '11 at 23:42
why is it better? – Malachiasz Sep 23 '21 at 11:18

yoAlex5 · Answer 3 · 2023-05-05T13:06:06.353

3

Android get User Agent

An alternative

if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR1) {
    String userAgent = WebSettings.getDefaultUserAgent(context);
}

edited May 05 '23 at 13:06

answered Oct 08 '18 at 10:40

yoAlex5

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Jesudas Lobo · Answer 4 · 2018-05-30T17:16:23.497

2

When you use web view to access the user-agent, make sure you run the

new WebView(this).getSettings().getUserAgentString();

on the UI thread.

If you want access the user agent on background thread. use

System.getProperty("http.agent")

To check whether a user-agent is valid or not use this https://deviceatlas.com/device-data/user-agent-tester

edited May 30 '18 at 17:16

answered May 30 '18 at 17:10

Jesudas Lobo

41
6

how to get the default HTTP USER AGENT from the android device?

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