How to enable or disable Ethernet programmatically?

Question

I want to enable and disable Ethernet in android programatically. I have used following commands which are working on terminal but not on Java code.

ifconfig eth0 down
ifconfig eth0 up

and my code

public String executeCommand() {
    StringBuffer output = new StringBuffer();
    Process p;
    try {
        p = Runtime.getRuntime().exec("ifconfig eth0 down");
        p.waitFor();
        BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
        String line = "";
        while ((line = reader.readLine())!= null) {
            output.append(line);
        }
    } catch (Exception e) {
        Log.d(TAG,"  exception "+e.toString());
        e.printStackTrace();
    }
    String response = output.toString();
    Log.d(TAG," response "+response);
    return response;
}

After running this code, I have run cat /sys/class/net/eth0/operstate command in same code. It is working fine but Ethernet not disable.

so what is the value of `response`? – Lino Jan 03 '18 at 14:58 — Lino, Jan 03 '18 at 14:58
nothing in response means empty or blank. – D.J Jan 04 '18 at 04:04 — D.J, Jan 04 '18 at 04:04
i have the same issue. Have you solved it yet? – Slim_user71169 Dec 08 '19 at 15:58 — Slim_user71169, Dec 08 '19 at 15:58

score 0 · Answer 1 · answered Jan 10 '18 at 10:38

0

I have not add Internet permission in manifest file.

answered Jan 10 '18 at 10:38

D.J

1,439
1
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23

Dunfield · Answer 2 · 2018-01-25T14:17:14.667

0

Try something like this:

        String c = "ifconfig eth0 down\n";

        Process rproc = Runtime.getRuntime().exec("sh");
        DataOutputStream os = new DataOutputStream(rproc.getOutputStream());

        os.writeBytes(c);
        os.flush();

I'm looking to do something like this as well so if it works for you, I'll try it. ;) This command will likely require root access to work.

edited Jan 25 '18 at 14:17

answered Jan 25 '18 at 14:10

Dunfield

785
6
11

How to enable or disable Ethernet programmatically?

2 Answers2