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      1 /*
      2  * Copyright (C) 2014 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 android.test.wakeuploop;
     18 
     19 import android.app.AlarmManager;
     20 import android.app.PendingIntent;
     21 import android.content.BroadcastReceiver;
     22 import android.content.Context;
     23 import android.content.Intent;
     24 import android.os.Environment;
     25 import android.os.Message;
     26 import android.os.Messenger;
     27 import android.os.PowerManager;
     28 import android.os.PowerManager.WakeLock;
     29 import android.os.RemoteException;
     30 import android.os.SystemClock;
     31 import android.util.Log;
     32 
     33 import java.io.File;
     34 
     35 /**
     36  * The receiver for the alarm we set
     37  *
     38  */
     39 public class WakeUpCall extends BroadcastReceiver {
     40     private static final String LOG_TAG = WakeUpCall.class.getSimpleName();
     41     static final String WAKEUP_CALL = "android.test.wakeuploop.WAKEUP";
     42     static final String CANCEL = "CANCEL";
     43 
     44     @Override
     45     public void onReceive(Context context, Intent intent) {
     46         AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
     47         boolean cancel = intent.hasExtra(CANCEL);
     48         if (!cancel) {
     49             long maxLoop = intent.getLongExtra(WakeLoopService.MAX_LOOP, 0);
     50             long wakeupInterval = intent.getLongExtra(WakeLoopService.WAKEUP_INTERNAL, 0);
     51             long thisLoop = intent.getLongExtra(WakeLoopService.THIS_LOOP, -1);
     52             Log.d(LOG_TAG, String.format("incoming: interval = %d, max loop = %d, this loop = %d",
     53                     wakeupInterval, maxLoop, thisLoop));
     54             if (thisLoop == -1) {
     55                 Log.e(LOG_TAG, "no valid loop count received, trying to stop service");
     56                 stopService(intent);
     57                 return;
     58             }
     59             if (wakeupInterval == 0) {
     60                 Log.e(LOG_TAG, "no valid wakeup interval received, trying to stop service");
     61                 stopService(intent);
     62                 return;
     63             }
     64             thisLoop++;
     65             Log.d(LOG_TAG, String.format("WakeLoop - iteration %d of %d", thisLoop, maxLoop));
     66             if (thisLoop == maxLoop) {
     67                 // when maxLoop is 0, we loop forever, so not checking that case
     68                 // here
     69                 Log.d(LOG_TAG, "reached max loop count, stopping service");
     70                 stopService(intent);
     71                 return;
     72             }
     73             screenOn(context);
     74             FileUtil.get().writeDateToFile(
     75                     new File(Environment.getExternalStorageDirectory(), "wakeup-loop.txt"));
     76             // calculate when device should be waken up
     77             long atTime = SystemClock.elapsedRealtime() + wakeupInterval;
     78             intent.putExtra(WakeLoopService.THIS_LOOP, thisLoop);
     79             PendingIntent pi = PendingIntent.getBroadcast(context, 0, intent,
     80                     PendingIntent.FLAG_UPDATE_CURRENT);
     81             // set alarm, which will be delivered in form of the wakeupIntent
     82             am.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, atTime, pi);
     83         } else {
     84             // cancel alarms
     85             Log.d(LOG_TAG, "cancelling future alarms on request");
     86             am.cancel(PendingIntent.getBroadcast(context, 0, intent, 0));
     87         }
     88     }
     89 
     90     private void stopService(Intent i) {
     91         Messenger msgr = i.getParcelableExtra(WakeLoopService.STOP_CALLBACK);
     92         if (msgr == null) {
     93             Log.e(LOG_TAG, "no stop service callback found, cannot stop");
     94         } else {
     95             Message msg = new Message();
     96             msg.what = WakeLoopService.MSG_STOP_SERVICE;
     97             try {
     98                 msgr.send(msg);
     99             } catch (RemoteException e) {
    100                 Log.e(LOG_TAG, "ignored remoted exception while attempting to stop service", e);
    101             }
    102         }
    103     }
    104 
    105     private void screenOn(Context context) {
    106         PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
    107         @SuppressWarnings("deprecation")
    108         WakeLock wl = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK |
    109                 PowerManager.ACQUIRE_CAUSES_WAKEUP, LOG_TAG);
    110         wl.acquire(500);
    111     }
    112 }
    113