How to send SMS or email on starting of android device

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Mobile

Android

I am creating a small android application, which send SMS to pre-defined mobile number (or email) on restarting the phone. I have use several codes which are suggested from various sites. But these are not working. Attaching the code which i use currently. ( But it do not send message... )

Please Help me.. Thanks in advance..

@Override
    public void onCreate()
    {
        super.onCreate();

        Thread th = new Thread(null, task, "NotifyingService");
        th.start();

    }
    private Runnable task = new Runnable()
    {
        public void run()
        {
            String smsmsg=" Your phone is restarted. ";

            SmsManager sms = SmsManager.getDefault();
            String ph="9898989898";
            sms.sendTextMessage(ph, null, smsmsg, null, null);
            SendSMS_OnBoot.this.stopSelf();
        }
    };