Android Alarm

// In Manifest:

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity> ... </activity>
        <receiver android:name=".AlarmReceiver"></receiver>
    </application>

// AlarmReceiver

package com.example.alarmmanagertry;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

public class AlarmReceiver extends BroadcastReceiver {

  @Override
	public void onReceive(Context context, Intent intent) {
		Log.d("AlarmReceiver", "recieve = =");
		try {
			Bundle bundle = intent.getExtras();
			String message = bundle.getString("alarm_message");
			Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
		} catch (Exception e) {
			Toast.makeText(
					context,
					"There was an error somewhere, but we still received an alarm",
					Toast.LENGTH_SHORT).show();
			e.printStackTrace();

		}
	}
}


// To Trigger the alarm
                Intent intent = new Intent(this, AlarmReceiver.class);
          	intent.setData(Uri.parse("content://com.example.alarmmanagertry/" + n));
		intent.putExtra("alarm_message", "O'Doyle Rules! n = " + n);
		PendingIntent sender = PendingIntent.getBroadcast(this, 192837, intent,
				PendingIntent.FLAG_UPDATE_CURRENT);

		AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
		am.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 3 * 1000, sender);