alarmservice_service.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.Notification;
import android.app.NotificationManager;
import android.app.Service;
import android.content.Intent;
import android.os.BinderNative;
import android.os.IBinder;
import android.os.Parcel;

/**
 * This is an example of implementing an application service that will run in
 * response to an alarm, allowing us to move long duration work out of an
 * intent receiver.
 * 
 * @see AlarmService
 * @see AlarmService_Alarm
 */
public class AlarmService_Service extends Service implements Runnable
{
    @Override
    protected void onCreate()
    {
        mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);

        // This is who should be launched if the user selects our persistent
        // notification.
        Intent intent = new Intent(this, AlarmService.class);

        // We are going to display a notification for the entire time that we
        // are running.
        mNM.notifyWithText(R.string.alarm_service_started,
                   getText(R.string.alarm_service_started),
                   NotificationManager.LENGTH_SHORT,
                   new Notification(
                       R.drawable.stat_sample,
                       getText(R.string.alarm_service_label),
                       intent,
                       null,
                       null));

        // Start up the thread running the service.  Note that we create a
        // separate thread because the service normally runs in the process's
        // main thread, which we don't want to block.
        Thread thr = new Thread(null, this, "AlarmService_Service");
        thr.start();
    }

    @Override
    protected void onDestroy()
    {
        // Cancel the persistent notification.
        mNM.cancel(R.string.alarm_service_started);

        // Tell the user we stopped.
        mNM.notifyWithText(R.string.alarm_service_finished,
                   getText(R.string.alarm_service_finished),
                   NotificationManager.LENGTH_SHORT,
                   null);
    }

    public void run()
    {
        // Normally we would do some work here...  for our sample, we will
        // just sleep for 30 seconds.
        long endTime = System.currentTimeMillis() + 15*1000;
        while (System.currentTimeMillis() < endTime) {
            synchronized (mBinder) {
                try {
                    mBinder.wait(endTime - System.currentTimeMillis());
                } catch (Exception e) {
                }
            }
        }

        // Done with our work...  stop the service!
        this.stopSelf();
    }

    @Override
    public IBinder getBinder()
    {
        return mBinder;
    }

    // This is the object that receives interactions from clients.  See
    // RemoteService for a more complete example.
    private final IBinder mBinder = new BinderNative()
    {
        @Override
		protected boolean onTransact(int code, Parcel data, Parcel reply, int flags) {
            return super.onTransact(code, data, reply, flags);
        }
    };

    private NotificationManager mNM;
}