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//AlarmCreateActivity.java
package course.examples.Alarms.AlarmCreate;

import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.os.SystemClock;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class AlarmCreateActivity extends Activity {

	private AlarmManager mAlarmManager;
	private Intent mNotificationReceiverIntent, mLoggerReceiverIntent;
	private PendingIntent mNotificationReceiverPendingIntent,
			mLoggerReceiverPendingIntent;
	private static final long INITIAL_ALARM_DELAY = 2 * 60 * 1000L;
	protected static final long JITTER = 5000L;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		setContentView(R.layout.main);

		//1.  Get the AlarmManager Service
		mAlarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);

		//2.  Create PendingIntent to start the AlarmNotificationReceiver
		mNotificationReceiverIntent = new Intent(AlarmCreateActivity.this,
				AlarmNotificationReceiver.class);
		mNotificationReceiverPendingIntent = PendingIntent.getBroadcast(
				AlarmCreateActivity.this, 0, mNotificationReceiverIntent, 0);

		// Create PendingIntent to start the AlarmLoggerReceiver
		mLoggerReceiverIntent = new Intent(AlarmCreateActivity.this,
				AlarmLoggerReceiver.class);
		mLoggerReceiverPendingIntent = PendingIntent.getBroadcast(
				AlarmCreateActivity.this, 0, mLoggerReceiverIntent, 0);

		// Single Alarm Button
		final Button singleAlarmButton = (Button) findViewById(R.id.single_alarm_button);
		singleAlarmButton.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				mAlarmManager.set(AlarmManager.RTC_WAKEUP,
						System.currentTimeMillis() + INITIAL_ALARM_DELAY,
						mNotificationReceiverPendingIntent);

				mAlarmManager.set(AlarmManager.RTC_WAKEUP,
						System.currentTimeMillis() + INITIAL_ALARM_DELAY
								+ JITTER, mLoggerReceiverPendingIntent);

				Toast.makeText(getApplicationContext(), "Single Alarm Set",
						Toast.LENGTH_LONG).show();
			}
		});

		// Repeating Alarm Button
		final Button repeatingAlarmButton = (Button) findViewById(R.id.repeating_alarm_button);
		repeatingAlarmButton.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				mAlarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME,
						SystemClock.elapsedRealtime() + INITIAL_ALARM_DELAY,
						AlarmManager.INTERVAL_FIFTEEN_MINUTES,
						mNotificationReceiverPendingIntent);

				mAlarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME,
						SystemClock.elapsedRealtime() + INITIAL_ALARM_DELAY
								+ JITTER,
						AlarmManager.INTERVAL_FIFTEEN_MINUTES,
						mLoggerReceiverPendingIntent);

				Toast.makeText(getApplicationContext(), "Repeating Alarm Set",
						Toast.LENGTH_LONG).show();
			}
		});

		// Inexact Repeating Alarm Button
		final Button inexactRepeatingAlarmButton = (Button) findViewById(R.id.inexact_repeating_alarm_button);
		inexactRepeatingAlarmButton.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				mAlarmManager.setInexactRepeating(
						AlarmManager.ELAPSED_REALTIME,
						SystemClock.elapsedRealtime() + INITIAL_ALARM_DELAY,
						AlarmManager.INTERVAL_FIFTEEN_MINUTES,
						mNotificationReceiverPendingIntent);

				mAlarmManager.setInexactRepeating(
						AlarmManager.ELAPSED_REALTIME,
						SystemClock.elapsedRealtime() + INITIAL_ALARM_DELAY
								+ JITTER,
						AlarmManager.INTERVAL_FIFTEEN_MINUTES,
						mLoggerReceiverPendingIntent);

				Toast.makeText(getApplicationContext(),
						"Inexact Repeating Alarm Set", Toast.LENGTH_LONG)
						.show();
			}
		});

		// Cancel Repeating Alarm Button
		final Button cancelRepeatingAlarmButton = (Button) findViewById(R.id.cancel_repeating_alarm_button);
		cancelRepeatingAlarmButton.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				mAlarmManager.cancel(mNotificationReceiverPendingIntent);
				mAlarmManager.cancel(mLoggerReceiverPendingIntent);

				Toast.makeText(getApplicationContext(),
						"Repeating Alarms Cancelled", Toast.LENGTH_LONG).show();
			}
		});

	}
}
==============================================================
//AlarmLoggerReceiver.java - Broadcast Receiver
package course.examples.Alarms.AlarmCreate;

import java.text.DateFormat;
import java.util.Date;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class AlarmLoggerReceiver extends BroadcastReceiver {
	
	private static final String TAG = "AlarmLoggerReceiver";  
	@Override
	public void onReceive(Context context, Intent intent) {
		Log.i(TAG,"Logging alarm at:" + DateFormat.getDateTimeInstance().format(new Date()));

	}
}
=======================================================
//AlarmNotificationReceiver
package course.examples.Alarms.AlarmCreate;

import java.text.DateFormat;
import java.util.Date;

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.util.Log;

public class AlarmNotificationReceiver extends BroadcastReceiver {
	// Notification ID to allow for future updates
	private static final int MY_NOTIFICATION_ID = 1;
	private static final String TAG = "AlarmNotificationReceiver";

	// Notification Text Elements
	private final CharSequence tickerText = "Are You Playing Angry Birds Again!";
	private final CharSequence contentTitle = "A Kind Reminder";
	private final CharSequence contentText = "Get back to studying!!";

	// Notification Action Elements
	private Intent mNotificationIntent;
	private PendingIntent mContentIntent;

	// Notification Sound and Vibration on Arrival
	private Uri soundURI = Uri
			.parse("android.resource://course.examples.Alarms.AlarmCreate/"
					+ R.raw.alarm_rooster);
	private long[] mVibratePattern = { 0, 200, 200, 300 };

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

		mNotificationIntent = new Intent(context, AlarmCreateActivity.class);
		mContentIntent = PendingIntent.getActivity(context, 0,
				mNotificationIntent, Intent.FLAG_ACTIVITY_NEW_TASK);

		Notification.Builder notificationBuilder = new Notification.Builder(
				context).setTicker(tickerText)
				.setSmallIcon(android.R.drawable.stat_sys_warning)
				.setAutoCancel(true).setContentTitle(contentTitle)
				.setContentText(contentText).setContentIntent(mContentIntent)
				.setSound(soundURI).setVibrate(mVibratePattern);

		// Pass the Notification to the NotificationManager:
		NotificationManager mNotificationManager = (NotificationManager) context
				.getSystemService(Context.NOTIFICATION_SERVICE);
		mNotificationManager.notify(MY_NOTIFICATION_ID,
				notificationBuilder.build());
		
		Log.i(TAG,"Sending notification at:" + DateFormat.getDateTimeInstance().format(new Date()));

	}
}