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
17package com.android.systemui.settings;
18
19import android.app.ActivityManager;
20import android.content.BroadcastReceiver;
21import android.content.Context;
22import android.content.Intent;
23import android.content.IntentFilter;
24import android.os.UserHandle;
25
26public abstract class CurrentUserTracker extends BroadcastReceiver {
27
28    private Context mContext;
29    private int mCurrentUserId;
30
31    public CurrentUserTracker(Context context) {
32        mContext = context;
33    }
34
35    public int getCurrentUserId() {
36        return mCurrentUserId;
37    }
38
39    @Override
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
50    public void startTracking() {
51        mCurrentUserId = ActivityManager.getCurrentUser();
52        IntentFilter filter = new IntentFilter(Intent.ACTION_USER_SWITCHED);
53        mContext.registerReceiver(this, filter);
54    }
55
56    public void stopTracking() {
57        mContext.unregisterReceiver(this);
58    }
59
60    public abstract void onUserSwitched(int newUserId);
61
62    public boolean isCurrentUserOwner() {
63        return mCurrentUserId == UserHandle.USER_OWNER;
64    }
65}
66