AlarmIntentPrimacyTester.java

//AlarmIntentPrimacyTester.java
package com.google.mcommerce.sample.android.chapter05.alarm;

import java.util.Calendar;

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

public class AlarmIntentPrimacyTester extends ScheduleIntentMultipleTimesTester {
	private static String tag = "AlarmIntentPrimacyTester";

	AlarmIntentPrimacyTester(Context ctx, IReportBack target) {
		super(ctx, target);
	}

	/*
	 * It is not the alarm that matters but the pending intent. Even with a
	 * repeating alarm for an intent, if you schedule the same intent again for
	 * one time, the later one takes affect.
	 * 
	 * It is as if you are setting the alarm on an existing intent multiple
	 * times and not the other way around.
	 */
	public void alarmIntentPrimacy() {
		Calendar cal = Utils.getTimeAfterInSecs(30);
		String s = Utils.getDateTimeString(cal);
		this.mReportTo.reportBack(tag,
				"Schdeduling Repeating alarm in 5 sec interval starting at: "
						+ s);

		// Get an intent to invoke
		// TestReceiver class
		Intent intent = new Intent(this.mContext, TestReceiver.class);
		intent.putExtra("message", "Repeating Alarm");

		PendingIntent pi = getDistinctPendingIntent(intent, 0);
		AlarmManager am = (AlarmManager) this.mContext
				.getSystemService(Context.ALARM_SERVICE);

		this.mReportTo
				.reportBack(tag, "Setting a repeat alarm 5 secs duration");
		am.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),
				5 * 1000, // 5 secs
				pi);

		this.mReportTo.reportBack(tag,
				"Setting a onetime alarm on the same intent");
		am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pi);
		this.mReportTo.reportBack(tag,
				"The later alarm, one time one, takes precedence");
	}
}