1 /*
2  * Copyright (C) 2013 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.settings;
18 
19 import android.app.ActivityManager;
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 public abstract class CurrentUserTracker extends BroadcastReceiver {
27 
28     private Context mContext;
29     private int mCurrentUserId;
30 
CurrentUserTracker(Context context)31     public CurrentUserTracker(Context context) {
32         mContext = context;
33     }
34 
getCurrentUserId()35     public int getCurrentUserId() {
36         return mCurrentUserId;
37     }
38 
39     @Override
onReceive(Context context, Intent intent)40     public void onReceive(Context context, Intent intent) {
41         if (Intent.ACTION_USER_SWITCHED.equals(intent.getAction())) {
42             int oldUserId = mCurrentUserId;
43             mCurrentUserId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0);
44             if (oldUserId != mCurrentUserId) {
45                 onUserSwitched(mCurrentUserId);
46             }
47         }
48     }
49 
startTracking()50     public void startTracking() {
51         mCurrentUserId = ActivityManager.getCurrentUser();
52         IntentFilter filter = new IntentFilter(Intent.ACTION_USER_SWITCHED);
53         mContext.registerReceiver(this, filter);
54     }
55 
stopTracking()56     public void stopTracking() {
57         mContext.unregisterReceiver(this);
58     }
59 
onUserSwitched(int newUserId)60     public abstract void onUserSwitched(int newUserId);
61 
isCurrentUserOwner()62     public boolean isCurrentUserOwner() {
63         return mCurrentUserId == UserHandle.USER_OWNER;
64     }
65 }
66