Kotlin 取 MAC 地址

 1 package com.example.ybs.myapplication
 2 
 3 import android.annotation.SuppressLint
 4 import android.net.wifi.WifiManager
 5 import android.support.v7.app.AppCompatActivity
 6 import android.os.Bundle
 7 import kotlinx.android.synthetic.main.activity_main.*
 8 import java.net.NetworkInterface
 9 
10 class MainActivity : AppCompatActivity() {
11 
12     override fun onCreate(savedInstanceState: Bundle?) {
13         super.onCreate(savedInstanceState)
14         setContentView(R.layout.activity_main);
15 
16         var mac = getLocalMacAddress();
17         txtInfo.text = mac;
18     }
19 
20     @SuppressLint("WifiManagerLeak")
21     fun getLocalMacAddress():String{
22          var Context = this.applicationContext;
23         var wifi= getSystemService(WIFI_SERVICE) as WifiManager;
24         var info=wifi.connectionInfo;
25         return info.macAddress;
26     }
27 
28 
29 }

需要权限

    <permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <permission android:name="android.permission.CHANGE_WIFI_STATE" />