Android Device ID 가져오기

Android 기기에서 DeviceID 를 가져오는 방법은 다음과 같다.

<uses-permission android:name="android.permission.READ_PHONE_STATE" />

if ( ContextCompat.checkSelfPermission( this, Manifest.permission.READ_PHONE_STATE ) != PackageManager.PERMISSION_GRANTED ) {

   TelephonyManager telephonyManager;
   telephonyManager = (TelephonyManager) getSystemService(Context.
         TELEPHONY_SERVICE);
   String deviceId = telephonyManager.getDeviceId();
   return deviceId;

}