get macaddress android (안드로이드 맥어드레스 가져오기)

1.AndroidManifest.xml setting(AndroidManifest.xml 다음의 권한을 추가)
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

2. make mathod(메소드를 만들어 사용한다)

public String getMacAddress(Context context) {
    WifiManager wimanager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
    String macAddress = wimanager.getConnectionInfo().getMacAddress();
    if (macAddress == null) {
        macAddress = "와이파이가 안되거나 맥어드레스가 없는경우";//device has no macaddress or wifi is disabled
    }
    return macAddress;
}

3. call mathod from other activity(다른 엑티비티에서 사용하기)
String macaddredd = getMacAddress(this);//or this.activity()