get Ip address from /proc/net/arp - Android Network

Android examples for Network:IP Address

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  4. IP Address

Description

get Ip address from /proc/net/arp

Demo Code

/*//from w  ww .  j  a v a2s. c o  m
 *     Copyright (C) 2016  Alexander Samtsov
 *
 *     This file is part of Wifi Devices Discovery.
 *
 *     Wifi Devices Discovery is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     Wifi Devices Discovery is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with Wifi Devices Discovery.  If not, see <http://www.gnu.org/licenses/>.
 */
//package com.java2s;
import android.util.Log;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;

public class Main {
    private static final String TAG = "DeviceHelper";

    public static ArrayList<String> getIps() {

        ArrayList<String> ips = new ArrayList<>();
        BufferedReader br = null;
        try {
            br = new BufferedReader(new FileReader("/proc/net/arp"));
        } catch (FileNotFoundException e) {
            Log.e(TAG, "file not found", e);
        }
        String line;
        try {
            if (br != null) {
                while ((line = br.readLine()) != null) {
                    String[] splitted = line.split(" +");
                    if (splitted.length >= 4
                            && ((splitted[2].equals("0x2")) || (splitted[2]
                                    .equals("0x0")))) {
                        String mac = splitted[3];
                        if (!mac.matches("00:00:00:00:00:00")) {
                            ips.add(splitted[0]);
                        }
                    }
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

        Collections.sort(ips);
        return ips;
    }
}

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