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      1 /*
      2  * Copyright (C) 2007 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.example.android.apis.app;
     18 
     19 // Need the following import to get access to the app resources, since this
     20 // class is in a sub-package.
     21 import com.example.android.apis.R;
     22 
     23 import android.app.Activity;
     24 import android.app.AlarmManager;
     25 import android.app.PendingIntent;
     26 import android.content.Intent;
     27 import android.os.SystemClock;
     28 import android.os.Bundle;
     29 import android.view.View;
     30 import android.view.View.OnClickListener;
     31 import android.widget.Button;
     32 import android.widget.Toast;
     33 
     34 
     35 /**
     36  * This demonstrates how you can schedule an alarm that causes a service to
     37  * be started.  This is useful when you want to schedule alarms that initiate
     38  * long-running operations, such as retrieving recent e-mails.
     39  */
     40 public class AlarmService extends Activity {
     41     private PendingIntent mAlarmSender;
     42 
     43     @Override
     44 	protected void onCreate(Bundle savedInstanceState) {
     45         super.onCreate(savedInstanceState);
     46 
     47         // Create an IntentSender that will launch our service, to be scheduled
     48         // with the alarm manager.
     49         mAlarmSender = PendingIntent.getService(AlarmService.this,
     50                 0, new Intent(AlarmService.this, AlarmService_Service.class), 0);
     51 
     52         setContentView(R.layout.alarm_service);
     53 
     54         // Watch for button clicks.
     55         Button button = (Button)findViewById(R.id.start_alarm);
     56         button.setOnClickListener(mStartAlarmListener);
     57         button = (Button)findViewById(R.id.stop_alarm);
     58         button.setOnClickListener(mStopAlarmListener);
     59     }
     60 
     61     private OnClickListener mStartAlarmListener = new OnClickListener() {
     62         public void onClick(View v) {
     63             // We want the alarm to go off 30 seconds from now.
     64             long firstTime = SystemClock.elapsedRealtime();
     65 
     66             // Schedule the alarm!
     67             AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
     68             am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
     69                             firstTime, 30*1000, mAlarmSender);
     70 
     71             // Tell the user about what we did.
     72             Toast.makeText(AlarmService.this, R.string.repeating_scheduled,
     73                     Toast.LENGTH_LONG).show();
     74         }
     75     };
     76 
     77     private OnClickListener mStopAlarmListener = new OnClickListener() {
     78         public void onClick(View v) {
     79             // And cancel the alarm.
     80             AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
     81             am.cancel(mAlarmSender);
     82 
     83             // Tell the user about what we did.
     84             Toast.makeText(AlarmService.this, R.string.repeating_unscheduled,
     85                     Toast.LENGTH_LONG).show();
     86 
     87         }
     88     };
     89 }
     90