Android UI How to - Setup recurring collection of events

Question

We would like to know how to setup recurring collection of events.
Answer

/*from w w w .j av a  2  s  .c o  m*/
/*
 * SDCardTrac application - keeps track of the /sdcard usage
 * Copyright (C) 2012 Narendra M.A.
*/


import java.util.Calendar;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

// Class to encapsulate AlarmManager calls

 class AlarmHelper {
    private Context ctx;
    // Alarms
    PendingIntent alarmIntent;
    
    public AlarmHelper(Context c) {
        ctx = c;
        alarmIntent = null;
    }
    
    // Setup recurring collection of events
    public boolean manageAlarm(boolean enable, boolean alarmSetupWasDone, int startOffset, long triggerInterval) {
        boolean alarmSetupDone = false;

        if (alarmIntent == null) {
            Intent triggerIntent = new Intent(ctx, AlarmHelper.class);
            alarmIntent = PendingIntent.getBroadcast(ctx, 0, triggerIntent, 0);
        }

        if (enable) {
            if (alarmSetupWasDone) {
                ((AlarmManager)ctx.getSystemService(Context.ALARM_SERVICE)).cancel(alarmIntent);
            }
            // Setup the alarm
            setupAlarm(startOffset, triggerInterval);
            alarmSetupDone = true;
        } else if (alarmSetupWasDone) {
            ((AlarmManager)ctx.getSystemService(Context.ALARM_SERVICE)).cancel(alarmIntent);
            Log.d(getClass().getName(), "Cancelling alarms");
            alarmSetupDone = false;
        }
        
        return alarmSetupDone;
    }
    
    // Alarm setup
    private void setupAlarm(int startOffset, long triggerInterval) {
        Log.d(this.getClass().getName(), "Setting up alarm for collection");

        AlarmManager alarmEr = (AlarmManager)ctx.getSystemService(Context.ALARM_SERVICE);
        Calendar time = Calendar.getInstance();
        time.setTimeInMillis(System.currentTimeMillis());
        time.add(Calendar.SECOND, startOffset);
        alarmEr.setInexactRepeating(AlarmManager.RTC_WAKEUP, time.getTimeInMillis(), 
                triggerInterval, alarmIntent); //AlarmManager.INTERVAL_FIFTEEN_MINUTES
        Log.d(this.getClass().getName(), "Done with alarm setup: " + triggerInterval);
    }
}