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