Get IMEI from ANDROID Application

IMEI.class

public class IMEI{

public String getIMEI(){
        //add 
        //<uses-permission android:name="android.permission.READ_PHONE_STATE" /> 
        //in manifest
        TelephonyManager tm = (TelephonyManager)getSystemService(TELEPHONY_SERVICE);
        String imei= tm.getDeviceId();
        return imei;

    }
}