En mi aplicación, estoy tratando de establecer un recordatorio y una alarma en ese recordatorio, pero no puedo hacerlo.

Como no tengo un conocimiento completo y correcto de cómo configurar un recordatorio, edítelo y elimínelo. Como busqué en google y lo que obtuve no es fácil de entender para mí.

Probé un código como: Main.java

Calendar cal = Calendar.getInstance();
java.util.Calendar;

// add minutes to the calendar object
cal.set(Calendar.MONTH, 4);
cal.set(Calendar.YEAR, 2011);               
cal.set(Calendar.DAY_OF_MONTH, 5);
cal.set(Calendar.HOUR_OF_DAY, 21);
cal.set(Calendar.MINUTE, 43);

Intent alarmintent = new Intent(getApplicationContext(), AlarmReceiver.class);
alarmintent.putExtra("title","Title of our Notification");
alarmintent.putExtra("note","Description of our  Notification");
//HELLO_ID is a static variable that must be initialised at the BEGINNING OF CLASS with    1;

//example:protected static int HELLO_ID =1;
PendingIntent sender = PendingIntent.getBroadcast(getApplicationContext(), HELLO_ID,
alarmintent,PendingIntent.FLAG_UPDATE_CURRENT|  Intent.FILL_IN_DATA);
//VERY IMPORTANT TO SET FLAG_UPDATE_CURRENT... this will send correct extra's     informations to 
//AlarmReceiver Class
// Get the AlarmManager service

AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), sender);

AlarmReceiver.java

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.widget.Toast;

public class AlarmReceiver extends BroadcastReceiver {

    private static int NOTIFICATION_ID = 1;

@Override
public void onReceive(Context context, Intent intent) {

    NotificationManager manger = (NotificationManager)     
    context.getSystemService(Context.NOTIFICATION_SERVICE);
    Notification notification = new Notification(R.drawable.icon, "Combi Note", System.currentTimeMillis());
    PendingIntent contentIntent = PendingIntent.getActivity(context, NOTIFICATION_ID, new Intent(context, AlarmReceiver.class), 0);
    Bundle extras=intent.getExtras();
    String title=extras.getString("title");
    //here we get the title and description of our Notification

    String note=extras.getString("note");
    notification.setLatestEventInfo(context, note, title, contentIntent);
    notification.flags = Notification.FLAG_INSISTENT;
    notification.defaults |= Notification.DEFAULT_SOUND;
    //here we set the default sound for our 
    //notification

    // The PendingIntent to launch our activity if the user selects this notification
    manger.notify(NOTIFICATION_ID++, notification);
    }
}

Cómo configurar recordatorios en el calendario, editarlos y eliminarlos.

Gracias.