Lookup manufacturer info by MAC address using www macvendorlookup com API

Last post show how to "Retrieve IP and MAC addresses of Android WiFi tethering clients from /proc/net/arp". This example show how to get vendor/manufacturer info of the associated MAC addresses.

(You can download runnable APK from link on bottom)

http://www.macvendorlookup.com/api provide API to lookup MAC Address Vendor/Manufacturer info.

Notice that this example havent handle error condition.


MainActivity.java

package com.blogspot.android_er.androidlistclient;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

 Button btnRead;
 TextView textResult;

 ListView listViewNode;
 ArrayList<Node> listNote;
 ArrayAdapter<Node> adapter;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 btnRead = (Button)findViewById(R.id.readclient);
 textResult = (TextView)findViewById(R.id.result);

 listViewNode = (ListView)findViewById(R.id.nodelist);
 listNote = new ArrayList<>();
 ArrayAdapter<Node> adapter =
 new ArrayAdapter<Node>(
 MainActivity.this,
 android.R.layout.simple_list_item_1,
 listNote);
 listViewNode.setAdapter(adapter);

 listViewNode.setOnItemClickListener(new AdapterView.OnItemClickListener() {
 @Override
 public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
 Node node = (Node) parent.getAdapter().getItem(position);
 Toast.makeText(MainActivity.this,
 "MAC: " + node.mac + " " +
 "IP: " + node.ip + " " +
 "company: " + node.company + " " +
 "country: " + node.country + " " +
 "addressL1: " + node.addressL1 + " " +
 "addressL2: " + node.addressL2 + " " +
 "addressL3: " + node.addressL3 + " " +
 "type: " + node.type + " " +
 "startHex: " + node.startHex + " " +
 "endHex: " + node.endHex + " " +
 "startDec: " + node.startDec + " " +
 "endDec: " + node.endDec,
 Toast.LENGTH_SHORT).show();
 }
 });

 btnRead.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 new TaskReadAddresses(listNote, listViewNode).execute();
 }
 });
 }



 class Node {
 String ip;
 String mac;

 String jsonBody;
 String startHex;
 String endHex;
 String startDec;
 String endDec;
 String company;
 String addressL1;
 String addressL2;
 String addressL3;
 String country;
 String type;

 String remark;

 String queryString = "http://www.macvendorlookup.com/api/v2/";

 Node(String ip, String mac){
 this.ip = ip;
 this.mac = mac;
 queryMacVendorLookup();
 }

 @Override
 public String toString() {
 return "IP: " + ip + " " + "MAC: " + mac + " " + company + " " + remark;
 }

 private String sendQuery(String qMac) throws IOException{
 String result = "";

 URL searchURL = new URL(queryString + qMac);

 HttpURLConnection httpURLConnection = (HttpURLConnection) searchURL.openConnection();

 if(httpURLConnection.getResponseCode() == HttpURLConnection.HTTP_OK){
 InputStreamReader inputStreamReader = new InputStreamReader(httpURLConnection.getInputStream());
 BufferedReader bufferedReader = new BufferedReader(
 inputStreamReader,
 8192);

 String line = null;
 while((line = bufferedReader.readLine()) != null){
 result += line;
 }

 bufferedReader.close();
 }

 return result;
 }


 private void ParseResult(String json){

 try {
 JSONArray jsonArray = new JSONArray(json);
 JSONObject jsonObject = (JSONObject) jsonArray.get(0);
 startHex = jsonObject.getString("startHex");
 endHex = jsonObject.getString("endHex");
 startDec = jsonObject.getString("startDec");
 endDec = jsonObject.getString("endDec");
 company = jsonObject.getString("company");
 addressL1 = jsonObject.getString("addressL1");
 addressL2 = jsonObject.getString("addressL2");
 addressL3 = jsonObject.getString("addressL3");
 country = jsonObject.getString("country");
 type = jsonObject.getString("type");
 remark = "OK";

 } catch (JSONException e) {
 e.printStackTrace();
 remark = e.getMessage();
 }

 }

 private void queryMacVendorLookup(){
 try {
 jsonBody = sendQuery(mac);
 ParseResult(jsonBody);
 } catch (IOException e) {
 e.printStackTrace();
 }
 }
 }

 private class TaskReadAddresses extends AsyncTask<Void, Node, Void> {

 ArrayList<Node> array;
 ListView listView;

 TaskReadAddresses(ArrayList<Node> array, ListView v){
 listView = v;
 this.array = array;
 array.clear();
 textResult.setText("querying...");
 }

 @Override
 protected Void doInBackground(Void... params) {
 readAddresses();

 return null;
 }

 @Override
 protected void onPostExecute(Void aVoid) {
 textResult.setText("Done");
 }

 @Override
 protected void onProgressUpdate(Node... values) {
 listNote.add(values[0]);
 ((ArrayAdapter)(listView.getAdapter())).notifyDataSetChanged();

 }

 private void readAddresses() {

 BufferedReader bufferedReader = null;

 try {
 bufferedReader = new BufferedReader(new FileReader("/proc/net/arp"));

 String line;
 while ((line = bufferedReader.readLine()) != null) {
 String[] splitted = line.split(" +");
 if (splitted != null && splitted.length >= 4) {
 String ip = splitted[0];
 String mac = splitted[3];
 if (mac.matches("..:..:..:..:..:..")) {
 Node thisNode = new Node(ip, mac);
 publishProgress(thisNode);
 }
 }
 }

 } catch (FileNotFoundException e) {
 e.printStackTrace();
 } catch (IOException e) {
 e.printStackTrace();
 } finally{
 try {
 bufferedReader.close();
 } catch (IOException e) {
 e.printStackTrace();
 }
 }
 }
 }
}

layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
 
 android_layout_width="match_parent"
 android_layout_height="match_parent"
 android_padding="16dp"
 android_orientation="vertical"
 tools_context="com.blogspot.android_er.androidlistclient.MainActivity">

 <TextView
 android_layout_width="wrap_content"
 android_layout_height="wrap_content"
 android_layout_gravity="center_horizontal"
 android_autoLink="web"
 android_text="http://android-er.blogspot.com/"
 android_textStyle="bold" />

 <Button
 android_id="@+id/readclient"
 android_layout_width="match_parent"
 android_layout_height="wrap_content"
 android_textAllCaps="false"
 android_text="Read Ip/MAC addresses"/>

 <TextView
 android_id="@+id/result"
 android_layout_width="match_parent"
 android_layout_height="wrap_content"/>

 <ListView
 android_id="@+id/nodelist"
 android_layout_width="match_parent"
 android_layout_height="wrap_content"/>
</LinearLayout>

uses-permission of "android.permission.INTERNET" is needed in AndroidManifest.xml

Download runnable APK .

Next:
- Get HostName of WiFi hotspot clients, and check if it is still connected.

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