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 onCreate(Bundle savedInstanceState)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