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 import java.util.Calendar;
35 
36 /**
37  * Example of scheduling one-shot and repeating alarms.  See
38  * {@link OneShotAlarm} for the code run when the one-shot alarm goes off, and
39  * {@link RepeatingAlarm} for the code run when the repeating alarm goes off.
40  * <h4>Demo</h4>
41 App/Service/Alarm Controller
42 
43 <h4>Source files</h4>
44 <table class="LinkTable">
45         <tr>
46             <td class="LinkColumn">src/com.example.android.apis/app/AlarmController.java</td>
47             <td class="DescrColumn">The activity that lets you schedule alarms</td>
48         </tr>
49         <tr>
50             <td class="LinkColumn">src/com.example.android.apis/app/OneShotAlarm.java</td>
51             <td class="DescrColumn">This is an intent receiver that executes when the
52                 one-shot alarm goes off</td>
53         </tr>
54         <tr>
55             <td class="LinkColumn">src/com.example.android.apis/app/RepeatingAlarm.java</td>
56             <td class="DescrColumn">This is an intent receiver that executes when the
57                 repeating alarm goes off</td>
58         </tr>
59         <tr>
60             <td class="LinkColumn">/res/any/layout/alarm_controller.xml</td>
61             <td class="DescrColumn">Defines contents of the screen</td>
62         </tr>
63 </table>
64 
65  */
66 public class AlarmController extends Activity {
67     Toast mToast;
68 
69     @Override
onCreate(Bundle savedInstanceState)70 	protected void onCreate(Bundle savedInstanceState) {
71         super.onCreate(savedInstanceState);
72 
73         setContentView(R.layout.alarm_controller);
74 
75         // Watch for button clicks.
76         Button button = (Button)findViewById(R.id.one_shot);
77         button.setOnClickListener(mOneShotListener);
78         button = (Button)findViewById(R.id.start_repeating);
79         button.setOnClickListener(mStartRepeatingListener);
80         button = (Button)findViewById(R.id.stop_repeating);
81         button.setOnClickListener(mStopRepeatingListener);
82     }
83 
84     private OnClickListener mOneShotListener = new OnClickListener() {
85         public void onClick(View v) {
86             // When the alarm goes off, we want to broadcast an Intent to our
87             // BroadcastReceiver.  Here we make an Intent with an explicit class
88             // name to have our own receiver (which has been published in
89             // AndroidManifest.xml) instantiated and called, and then create an
90             // IntentSender to have the intent executed as a broadcast.
91             Intent intent = new Intent(AlarmController.this, OneShotAlarm.class);
92             PendingIntent sender = PendingIntent.getBroadcast(AlarmController.this,
93                     0, intent, 0);
94 
95             // We want the alarm to go off 30 seconds from now.
96             Calendar calendar = Calendar.getInstance();
97             calendar.setTimeInMillis(System.currentTimeMillis());
98             calendar.add(Calendar.SECOND, 30);
99 
100             // Schedule the alarm!
101             AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
102             am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), sender);
103 
104             // Tell the user about what we did.
105             if (mToast != null) {
106                 mToast.cancel();
107             }
108             mToast = Toast.makeText(AlarmController.this, R.string.one_shot_scheduled,
109                     Toast.LENGTH_LONG);
110             mToast.show();
111         }
112     };
113 
114     private OnClickListener mStartRepeatingListener = new OnClickListener() {
115         public void onClick(View v) {
116             // When the alarm goes off, we want to broadcast an Intent to our
117             // BroadcastReceiver.  Here we make an Intent with an explicit class
118             // name to have our own receiver (which has been published in
119             // AndroidManifest.xml) instantiated and called, and then create an
120             // IntentSender to have the intent executed as a broadcast.
121             // Note that unlike above, this IntentSender is configured to
122             // allow itself to be sent multiple times.
123             Intent intent = new Intent(AlarmController.this, RepeatingAlarm.class);
124             PendingIntent sender = PendingIntent.getBroadcast(AlarmController.this,
125                     0, intent, 0);
126 
127             // We want the alarm to go off 30 seconds from now.
128             long firstTime = SystemClock.elapsedRealtime();
129             firstTime += 15*1000;
130 
131             // Schedule the alarm!
132             AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
133             am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
134                             firstTime, 15*1000, sender);
135 
136             // Tell the user about what we did.
137             if (mToast != null) {
138                 mToast.cancel();
139             }
140             mToast = Toast.makeText(AlarmController.this, R.string.repeating_scheduled,
141                     Toast.LENGTH_LONG);
142             mToast.show();
143         }
144     };
145 
146     private OnClickListener mStopRepeatingListener = new OnClickListener() {
147         public void onClick(View v) {
148             // Create the same intent, and thus a matching IntentSender, for
149             // the one that was scheduled.
150             Intent intent = new Intent(AlarmController.this, RepeatingAlarm.class);
151             PendingIntent sender = PendingIntent.getBroadcast(AlarmController.this,
152                     0, intent, 0);
153 
154             // And cancel the alarm.
155             AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
156             am.cancel(sender);
157 
158             // Tell the user about what we did.
159             if (mToast != null) {
160                 mToast.cancel();
161             }
162             mToast = Toast.makeText(AlarmController.this, R.string.repeating_unscheduled,
163                     Toast.LENGTH_LONG);
164             mToast.show();
165         }
166     };
167 }
168 
169