Okay that’s new to us android developers: You can no longer get the hardware MAC address of a android device. WifiInfo.getMacAddress() and BluetoothAdapter.getAddress() methods will return 02:00:00:00:00:00. This restriction was introduced in Android 6.0.
I wanted to know if this is true. So I tested this on my OnePlus One (Android 6.0.1 Cyanogen).
private String getMacAddress() { try { Context cntxt = getApplicationContext(); WifiManager wifi = (WifiManager) cntxt.getSystemService(Context.WIFI_SERVICE); if(wifi == null) return "Failed: WiFiManager is null"; WifiInfo info = wifi.getConnectionInfo(); if(info == null) return "Failed: WifiInfo is null";
return info.getMacAddress(); } catch (Exception e) { e.printStackTrace(); } return "Nothing"; }Result:
I/System.out: My android 6.0 mac address: 02:00:00:00:00:00
This proves that you can not access the mac addess with the Android API.
BUT I found an alternative way to get the MAC addr on a Android 6.0 device and it still works:
First add Internet User-Permission to your AndroidManifest.xml:
<uses-permission android:name=“android.permission.INTERNET“ />
With this code I was able to figure out my mac on a android 6.0 device:
public static String getMacAddr() { try { List<NetworkInterface> all = Collections.list(NetworkInterface.getNetworkInterfaces()); for (NetworkInterface nif : all) { if (!nif.getName().equalsIgnoreCase("wlan0")) continue; byte[] macBytes = nif.getHardwareAddress(); if (macBytes == null) { return ""; } StringBuilder res1 = new StringBuilder(); for (byte b : macBytes) { res1.append(Integer.toHexString(b & 0xFF) + ":"); } if (res1.length() > 0) { res1.deleteCharAt(res1.length() - 1); } return res1.toString(); } } catch (Exception ex) { } return "02:00:00:00:00:00"; }Feel free to use this in all your projects. If you use this in a commercial project don’t forget to donate! 😉
One thing that you have to keep in mind: On some devices the interface is not called „wlan0“. You need to adjust that.
The code didn’t get mac address but generate mac randomly. If you have 2 device you will see different mac address on app connected in same wifi