alarmcontroller.java

Google s android SDK

/* 
 * Copyright (C) 2007 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.android.samples.app;

// Need the following import to get access to the app resources, since this
// class is in a sub-package.
import com.google.android.samples.R;

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

import java.util.Calendar;

/**
 * Example of scheduling one-shot and repeating alarms.  See
 * {@link OneShotAlarm} for the code run when the one-shot alarm goes off, and
 * {@link RepeatingAlarm} for the code run when the repeating alarm goes off.
 * <h4>Demo</h4>
App/Service/Alarm Controller
 
<h4>Source files</h4>
<table class="LinkTable">
        <tr>
            <td class="LinkColumn">src/com/google/android/samples/app/AlarmController.java</td>
            <td class="DescrColumn">The activity that lets you schedule alarms</td>
        </tr>
        <tr>
            <td class="LinkColumn">src/com/google/android/samples/app/OneShotAlarm.java</td>
            <td class="DescrColumn">This is an intent receiver that executes when the
                one-shot alarm goes off</td>
        </tr>
        <tr>
            <td class="LinkColumn">src/com/google/android/samples/app/RepeatingAlarm.java</td>
            <td class="DescrColumn">This is an intent receiver that executes when the
                repeating alarm goes off</td>
        </tr>
        <tr>
            <td class="LinkColumn">/res/any/layout/alarm_controller.xml</td>
            <td class="DescrColumn">Defines contents of the screen</td>
        </tr>
</table>

 */
public class AlarmController extends Activity
{
    @Override
	protected void onCreate(Bundle icicle)
    {
        super.onCreate(icicle);

        setContentView(R.layout.alarm_controller);

        // Watch for button clicks.
        Button button = (Button)findViewById(R.id.one_shot);
        button.setOnClickListener(mOneShotListener);
        button = (Button)findViewById(R.id.start_repeating);
        button.setOnClickListener(mStartRepeatingListener);
        button = (Button)findViewById(R.id.stop_repeating);
        button.setOnClickListener(mStopRepeatingListener);
    }

    private OnClickListener mOneShotListener = new OnClickListener()
    {
        public void onClick(View v)
        {
            // This is the intent receiver who will be run when the alarm
            // goes off.  We just create an intent with an explicit class name
            // to have our own receiver (which has been published in
            // AndroidManifest.xml) instantiated and called.
            Intent intent = new Intent(AlarmController.this, OneShotAlarm.class);

            // We want the alarm to go off 30 seconds from now.
            Calendar calendar = Calendar.getInstance();
            calendar.setTimeInMillis(System.currentTimeMillis());
            calendar.add(Calendar.SECOND, 30);

            // Schedule the alarm!
            AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
            am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), intent);

            // Tell the user about what we did.
            NotificationManager nm = (NotificationManager)
                getSystemService(NOTIFICATION_SERVICE);
            nm.notifyWithText(R.string.one_shot_scheduled,
                      getText(R.string.one_shot_scheduled),
                      NotificationManager.LENGTH_LONG,
                      null);
        }
    };

    private OnClickListener mStartRepeatingListener = new OnClickListener()
    {
        public void onClick(View v)
        {
            // This is the intent receiver who will be run when the alarm
            // goes off.  We just create an intent with an explicit class name
            // to have our own receiver (which has been published in
            // AndroidManifest.xml) instantiated and called.
            Intent intent = new Intent(AlarmController.this, RepeatingAlarm.class);

            // We want the alarm to go off 30 seconds from now.
            long firstTime = SystemClock.elapsedRealtime();
            firstTime += 15*1000;

            // Schedule the alarm!
            AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
            am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
                            firstTime, 15*1000, intent);

            // Tell the user about what we did.
            NotificationManager nm = (NotificationManager)
                getSystemService(NOTIFICATION_SERVICE);
            nm.notifyWithText(R.string.repeating_scheduled,
                      getText(R.string.repeating_scheduled),
                      NotificationManager.LENGTH_LONG,
                      null);
        }
    };

    private OnClickListener mStopRepeatingListener = new OnClickListener()
    {
        public void onClick(View v)
        {
            // Create the same intent that was scheduled.
            Intent intent = new Intent(AlarmController.this, RepeatingAlarm.class);

            // And cancel the alarm.
            AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
            am.cancel(intent);

            // Tell the user about what we did.
            NotificationManager nm = (NotificationManager)
                getSystemService(NOTIFICATION_SERVICE);
            nm.cancel(R.string.repeating_scheduled);
            nm.notifyWithText(R.string.repeating_unscheduled,
                      getText(R.string.repeating_unscheduled),
                      NotificationManager.LENGTH_SHORT,
                      null);
        }
    };
}