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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 com.android.systemui.statusbar.policy;
     18 
     19 import android.app.AlarmManager;
     20 import android.content.BroadcastReceiver;
     21 import android.content.Context;
     22 import android.content.Intent;
     23 import android.content.IntentFilter;
     24 import android.os.UserHandle;
     25 
     26 import java.io.FileDescriptor;
     27 import java.io.PrintWriter;
     28 import java.util.ArrayList;
     29 
     30 public class NextAlarmController extends BroadcastReceiver {
     31 
     32     private final ArrayList<NextAlarmChangeCallback> mChangeCallbacks = new ArrayList<>();
     33 
     34     private AlarmManager mAlarmManager;
     35     private AlarmManager.AlarmClockInfo mNextAlarm;
     36 
     37     public NextAlarmController(Context context) {
     38         mAlarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
     39         IntentFilter filter = new IntentFilter();
     40         filter.addAction(Intent.ACTION_USER_SWITCHED);
     41         filter.addAction(AlarmManager.ACTION_NEXT_ALARM_CLOCK_CHANGED);
     42         context.registerReceiverAsUser(this, UserHandle.ALL, filter, null, null);
     43         updateNextAlarm();
     44     }
     45 
     46     public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
     47         pw.println("NextAlarmController state:");
     48         pw.print("  mNextAlarm="); pw.println(mNextAlarm);
     49     }
     50 
     51     public void addStateChangedCallback(NextAlarmChangeCallback cb) {
     52         mChangeCallbacks.add(cb);
     53         cb.onNextAlarmChanged(mNextAlarm);
     54     }
     55 
     56     public void removeStateChangedCallback(NextAlarmChangeCallback cb) {
     57         mChangeCallbacks.remove(cb);
     58     }
     59 
     60     public void onReceive(Context context, Intent intent) {
     61         final String action = intent.getAction();
     62         if (action.equals(Intent.ACTION_USER_SWITCHED)
     63                 || action.equals(AlarmManager.ACTION_NEXT_ALARM_CLOCK_CHANGED)) {
     64             updateNextAlarm();
     65         }
     66     }
     67 
     68     private void updateNextAlarm() {
     69         mNextAlarm = mAlarmManager.getNextAlarmClock(UserHandle.USER_CURRENT);
     70         fireNextAlarmChanged();
     71     }
     72 
     73     private void fireNextAlarmChanged() {
     74         int n = mChangeCallbacks.size();
     75         for (int i = 0; i < n; i++) {
     76             mChangeCallbacks.get(i).onNextAlarmChanged(mNextAlarm);
     77         }
     78     }
     79 
     80     public interface NextAlarmChangeCallback {
     81         void onNextAlarmChanged(AlarmManager.AlarmClockInfo nextAlarm);
     82     }
     83 }
     84