Java tutorial
//package com.java2s; import android.content.Context; import android.telephony.TelephonyManager; import android.text.TextUtils; public class Main { public static String getIMEI(Context context) { TelephonyManager telManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); String deviceId = telManager.getDeviceId(); return TextUtils.isEmpty(deviceId) ? "" : deviceId; } }