Java tutorial
//package com.java2s; //License from project: Open Source License import android.content.Context; import android.telephony.TelephonyManager; import android.text.TextUtils; public class Main { public static String DEVICE_ID; public static String getDeviceId(Context context) { if (TextUtils.isEmpty(DEVICE_ID)) { TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); DEVICE_ID = tm.getDeviceId(); } return DEVICE_ID; } }