获取Android设备无线和以太网MAC地址

package com.raycloud.wolf.blogformac;

import android.net.wifi.WifiManager;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import java.io.BufferedReader;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStreamReader;

public class MainActivity extends AppCompatActivity {

    private final String tag = "MainActivity";

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        findViewById(R.id.wifiMacButton).setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                WifiManager wifiManager = (WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE);

                Log.d(tag, "WiFi MAC Address: " + wifiManager.getConnectionInfo().getMacAddress());

            }

        });

        findViewById(R.id.ethernetMacButton).setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                try (BufferedReader input = new BufferedReader(new InputStreamReader(new FileInputStream("/sys/class/net/eth0/address")))) {

                    String ethernetMacAddress = input.readLine();

                    Log.d(tag, "Ethernet MAC Address: " + ethernetMacAddress);

                } catch (IOException ex) {

                    Log.e(tag, "ex: " + ex);

                }

            }

        });

    }

}