Java tutorial
//package com.java2s; //License from project: Open Source License import android.content.Context; import android.provider.Settings; import android.telephony.TelephonyManager; import android.text.TextUtils; public class Main { public static String getDeviceIMEI(Context context) { TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); if (telephonyManager == null || TextUtils.isEmpty(telephonyManager.getDeviceId())) { return Settings.Secure.getString(context.getContentResolver(), Settings.Secure.ANDROID_ID); } else { return telephonyManager.getDeviceId(); } } }