Question: i am working on **Android with Java** (Android studio) to create Android app so **i want to get Mac Address.** so my Question is how i can find Mac address? Mac address will be Unique for each User. User will download the app then he should display the mac address so he can use same mac address to activate the device from website. so i just want to get MAC Address and it will be unique for each user.

Answer: 
**Step 1:** Add the permissions. In `Manifest.xml` file add below lines

```
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> 

```

**Step 2:** Create the method to get the MAC address

```
public String getMacAddress(){
        try{
            List<NetworkInterface> networkInterfaceList = Collections.list(NetworkInterface.getNetworkInterfaces());
            String stringMac = "";
            for(NetworkInterface networkInterface : networkInterfaceList){
                if(networkInterface.getName().equalsIgnoreCase("wlon0"));
                {
                    for(int i=0;i <networkInterface.getHardwareAddress().length; i++){
                        String stringMacByte = Integer.toHexString(networkInterface.getHardwareAddress()[i]& 0xFF);
                        if(stringMacByte.length()==1){
                            stringMacByte = "0" +stringMacByte;
                        }
                        stringMac += stringMacByte.toUpperCase() + ":";
                    } break;
                }
            }
            return stringMac;
        }catch (SocketException e)
        {
            e.printStackTrace();
        }
        return  "0";
    }

```

**Step 3:** Call the method to get the MAC Address

```
String mobile_mac_addres = getMacAddress();  //call the method that return mac address 
Log.d("MyMacIS",mobile_mac_address);  // this prints the MAC Address

```
use this code programatically get `macAddress`

```
WifiManager wifiManager = (WifiManager)   getSystemService(Context.WIFI_SERVICE);
    WifiInfo wInfo = wifiManager.getConnectionInfo();
    String macAddress = wInfo.getMacAddress();

```