Android - How to Set an Alarm to a Specific Date

Android - how to set an alarm to a specific date

package your.pack.name;

import java.util.Calendar;

import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;

public class AlarmActivity extends Activity {
    /** Called when the activity is first created. */

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Calendar cal = Calendar.getInstance();

        cal.setTimeInMillis(System.currentTimeMillis());
        cal.clear();
        cal.set(2012,2,8,18,16);

        AlarmManager alarmMgr = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(this, AlarmReceiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
       // cal.add(Calendar.SECOND, 5);
        alarmMgr.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pendingIntent);

    }
}

Is it possible to set a specific date with the Alarm Clock?

You cannot set the an alarm for a specific date with an AlarmClock provider.

AlarmClock.EXTRA_DAYS is for repeating alarms. You could use something like Calendar.SUNDAY and it would ring every Sunday.

If you want more control over an alarm, you have to program it yourself. Look into the AlarmManager class. It allows you to schedule your application to be run at some point in the future.

How to set android alarm to trigger until an specific date

 AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);

        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.HOUR_OF_DAY, 14);
        calendar.set(Calendar.MINUTE, 30);
        int weekInMillis = 7 * 24 * 60 * 60 * 1000;

        alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
                weekInMillis, PendingIntent.getBroadcast(context, 0, new Intent(context, ReminderAlarmWakefulBroadcastReceiver.class), PendingIntent.FLAG_UPDATE_CURRENT));

Above code snippet sets an alarm for 2:30 PM that repeats itself every week. Tweak calendar for varying the time at which the alarm goes off. For example, the coming Monday.

When the alarm goes off, it sends a broadcast which will be received by ReminderWakefulBroadcastReceiver, a custom receiver containing the code that you want to run every Monday at 2:30 PM. This code should also check whether it is time to cancel the alarm and if it is, the following code cancels it:

 AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
 alarmManager.cancel(PendingIntent.getBroadcast(context, 0, new Intent(context, ReminderAlarmWakefulBroadcastReceiver.class));

References:
AlarmManager, Scheduling Repeating Alarms, PendingIntent

Android alarm setting with specific date

You should call public void setRepeating (int type, long triggerAtTime, long interval, PendingIntent operation)(see here) to repeat the alarm. For example, you want to fire the alarm on 9:00 am every day, you can do :

Calendar c=Calendar.getInstance();
c.set(Calendar.HOUR_OF_DAY, 9);
c.set(Calendar.MINUTE, 0);
setRepeating(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), AlarmManager.INTERVAL_DAY,pendingIntent);

Also,set the last parameter to 0 when initilazing the PendingIntent.

PendingIntent pendingIntent = PendingIntent.getBroadcast(fridgeDetails.this, 
                        0, myIntent, 0);

How to set an alarm at a specific date at any chosen time?

Use BroadcastReceiver.

public class MyBroadcastReceiver extends BroadcastReceiver {  
    MediaPlayer mp;  
    @Override  
    public void onReceive(Context context, Intent intent) {  
        mp=MediaPlayer.create(context, R.raw.alrm   );  
        mp.start();  
        Toast.makeText(context, "Alarm....", Toast.LENGTH_LONG).show();  
    }  
} 

Start Alarm-

//  i = int time from calander.
     int i = 12;  
            Intent intent = new Intent(this, MyBroadcastReceiver.class);  
            PendingIntent pendingIntent = PendingIntent.getBroadcast(  
                                          this.getApplicationContext(), 234324243, intent, 0);  
            AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);  
            alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()  
                                          + (i * 1000), pendingIntent);  
            Toast.makeText(this, "Alarm set in " + i + " seconds",Toast.LENGTH_LONG).show();   

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