1 /*
2  * Copyright (C) 2015 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 package com.android.settings.fuelgauge;
17 
18 import android.os.IDeviceIdleController;
19 import android.os.RemoteException;
20 import android.os.ServiceManager;
21 import android.support.annotation.VisibleForTesting;
22 
23 import android.util.ArraySet;
24 import android.util.Log;
25 
26 
27 /**
28  * Handles getting/changing the whitelist for the exceptions to battery saving features.
29  */
30 public class PowerWhitelistBackend {
31 
32     private static final String TAG = "PowerWhitelistBackend";
33 
34     private static final String DEVICE_IDLE_SERVICE = "deviceidle";
35 
36     private static PowerWhitelistBackend sInstance;
37 
38     private final IDeviceIdleController mDeviceIdleService;
39     private final ArraySet<String> mWhitelistedApps = new ArraySet<>();
40     private final ArraySet<String> mSysWhitelistedApps = new ArraySet<>();
41 
PowerWhitelistBackend()42     public PowerWhitelistBackend() {
43         mDeviceIdleService = IDeviceIdleController.Stub.asInterface(
44                 ServiceManager.getService(DEVICE_IDLE_SERVICE));
45         refreshList();
46     }
47 
getWhitelistSize()48     public int getWhitelistSize() {
49         return mWhitelistedApps.size();
50     }
51 
isSysWhitelisted(String pkg)52     public boolean isSysWhitelisted(String pkg) {
53         return mSysWhitelistedApps.contains(pkg);
54     }
55 
isWhitelisted(String pkg)56     public boolean isWhitelisted(String pkg) {
57         return mWhitelistedApps.contains(pkg);
58     }
59 
addApp(String pkg)60     public void addApp(String pkg) {
61         try {
62             mDeviceIdleService.addPowerSaveWhitelistApp(pkg);
63             mWhitelistedApps.add(pkg);
64         } catch (RemoteException e) {
65             Log.w(TAG, "Unable to reach IDeviceIdleController", e);
66         }
67     }
68 
removeApp(String pkg)69     public void removeApp(String pkg) {
70         try {
71             mDeviceIdleService.removePowerSaveWhitelistApp(pkg);
72             mWhitelistedApps.remove(pkg);
73         } catch (RemoteException e) {
74             Log.w(TAG, "Unable to reach IDeviceIdleController", e);
75         }
76     }
77 
78     @VisibleForTesting
refreshList()79     void refreshList() {
80         mSysWhitelistedApps.clear();
81         mWhitelistedApps.clear();
82         try {
83             String[] whitelistedApps = mDeviceIdleService.getFullPowerWhitelist();
84             for (String app : whitelistedApps) {
85                 mWhitelistedApps.add(app);
86             }
87             String[] sysWhitelistedApps = mDeviceIdleService.getSystemPowerWhitelist();
88             for (String app : sysWhitelistedApps) {
89                 mSysWhitelistedApps.add(app);
90             }
91         } catch (RemoteException e) {
92             Log.w(TAG, "Unable to reach IDeviceIdleController", e);
93         }
94     }
95 
getInstance()96     public static PowerWhitelistBackend getInstance() {
97         if (sInstance == null) {
98             sInstance = new PowerWhitelistBackend();
99         }
100         return sInstance;
101     }
102 
103 }
104