1 /*
2  * Copyright (C) 2008 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.settings.bluetooth;
18 
19 import android.app.QueuedWork;
20 import android.content.Context;
21 import android.content.SharedPreferences;
22 import android.content.res.Configuration;
23 import android.text.TextUtils;
24 import android.util.Log;
25 
26 import com.android.settingslib.bluetooth.LocalBluetoothAdapter;
27 import com.android.settingslib.bluetooth.LocalBluetoothManager;
28 
29 /**
30  * LocalBluetoothPreferences provides an interface to the preferences
31  * related to Bluetooth.
32  */
33 final class LocalBluetoothPreferences {
34     private static final String TAG = "LocalBluetoothPreferences";
35     private static final boolean DEBUG = Utils.D;
36     private static final String SHARED_PREFERENCES_NAME = "bluetooth_settings";
37 
38     // If a device was picked from the device picker or was in discoverable mode
39     // in the last 60 seconds, show the pairing dialogs in foreground instead
40     // of raising notifications
41     private static final int GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND = 60 * 1000;
42 
43     private static final String KEY_DISCOVERING_TIMESTAMP = "last_discovering_time";
44 
45     private static final String KEY_LAST_SELECTED_DEVICE = "last_selected_device";
46 
47     private static final String KEY_LAST_SELECTED_DEVICE_TIME = "last_selected_device_time";
48 
49     private static final String KEY_DOCK_AUTO_CONNECT = "auto_connect_to_dock";
50 
51     private static final String KEY_DISCOVERABLE_END_TIMESTAMP = "discoverable_end_timestamp";
52 
LocalBluetoothPreferences()53     private LocalBluetoothPreferences() {
54     }
55 
getSharedPreferences(Context context)56     private static SharedPreferences getSharedPreferences(Context context) {
57         return context.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
58     }
59 
getDiscoverableEndTimestamp(Context context)60     static long getDiscoverableEndTimestamp(Context context) {
61         return getSharedPreferences(context).getLong(
62                 KEY_DISCOVERABLE_END_TIMESTAMP, 0);
63     }
64 
shouldShowDialogInForeground(Context context, String deviceAddress, String deviceName)65     static boolean shouldShowDialogInForeground(Context context,
66             String deviceAddress, String deviceName) {
67         LocalBluetoothManager manager = Utils.getLocalBtManager(context);
68         if (manager == null) {
69             if (DEBUG) Log.v(TAG, "manager == null - do not show dialog.");
70             return false;
71         }
72 
73         // If Bluetooth Settings is visible
74         if (manager.isForegroundActivity()) {
75             return true;
76         }
77 
78         // If in appliance mode, do not show dialog in foreground.
79         if ((context.getResources().getConfiguration().uiMode &
80                 Configuration.UI_MODE_TYPE_APPLIANCE) == Configuration.UI_MODE_TYPE_APPLIANCE) {
81             if (DEBUG) Log.v(TAG, "in appliance mode - do not show dialog.");
82             return false;
83         }
84 
85         long currentTimeMillis = System.currentTimeMillis();
86         SharedPreferences sharedPreferences = getSharedPreferences(context);
87 
88         // If the device was in discoverABLE mode recently
89         long lastDiscoverableEndTime = sharedPreferences.getLong(
90                 KEY_DISCOVERABLE_END_TIMESTAMP, 0);
91         if ((lastDiscoverableEndTime + GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND)
92                 > currentTimeMillis) {
93             return true;
94         }
95 
96         // If the device was discoverING recently
97         LocalBluetoothAdapter adapter = manager.getBluetoothAdapter();
98         if (adapter != null && adapter.isDiscovering()) {
99             return true;
100         } else if ((sharedPreferences.getLong(KEY_DISCOVERING_TIMESTAMP, 0) +
101                 GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND) > currentTimeMillis) {
102             return true;
103         }
104 
105         // If the device was picked in the device picker recently
106         if (deviceAddress != null) {
107             String lastSelectedDevice = sharedPreferences.getString(
108                     KEY_LAST_SELECTED_DEVICE, null);
109 
110             if (deviceAddress.equals(lastSelectedDevice)) {
111                 long lastDeviceSelectedTime = sharedPreferences.getLong(
112                         KEY_LAST_SELECTED_DEVICE_TIME, 0);
113                 if ((lastDeviceSelectedTime + GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND)
114                         > currentTimeMillis) {
115                     return true;
116                 }
117             }
118         }
119 
120 
121         if (!TextUtils.isEmpty(deviceName)) {
122             // If the device is a custom BT keyboard specifically for this device
123             String packagedKeyboardName = context.getString(
124                     com.android.internal.R.string.config_packagedKeyboardName);
125             if (deviceName.equals(packagedKeyboardName)) {
126                 if (DEBUG) Log.v(TAG, "showing dialog for packaged keyboard");
127                 return true;
128             }
129         }
130 
131         if (DEBUG) Log.v(TAG, "Found no reason to show the dialog - do not show dialog.");
132         return false;
133     }
134 
persistSelectedDeviceInPicker(Context context, String deviceAddress)135     static void persistSelectedDeviceInPicker(Context context, String deviceAddress) {
136         SharedPreferences.Editor editor = getSharedPreferences(context).edit();
137         editor.putString(KEY_LAST_SELECTED_DEVICE,
138                 deviceAddress);
139         editor.putLong(KEY_LAST_SELECTED_DEVICE_TIME,
140                 System.currentTimeMillis());
141         editor.apply();
142     }
143 
persistDiscoverableEndTimestamp(Context context, long endTimestamp)144     static void persistDiscoverableEndTimestamp(Context context, long endTimestamp) {
145         SharedPreferences.Editor editor = getSharedPreferences(context).edit();
146         editor.putLong(KEY_DISCOVERABLE_END_TIMESTAMP, endTimestamp);
147         editor.apply();
148     }
149 
persistDiscoveringTimestamp(final Context context)150     static void persistDiscoveringTimestamp(final Context context) {
151         // Load the shared preferences and edit it on a background
152         // thread (but serialized!).
153         QueuedWork.singleThreadExecutor().submit(new Runnable() {
154                 public void run() {
155                     SharedPreferences.Editor editor = getSharedPreferences(context).edit();
156                     editor.putLong(
157                             KEY_DISCOVERING_TIMESTAMP,
158                         System.currentTimeMillis());
159                     editor.apply();
160                 }
161             });
162     }
163 
hasDockAutoConnectSetting(Context context, String addr)164     static boolean hasDockAutoConnectSetting(Context context, String addr) {
165         return getSharedPreferences(context).contains(KEY_DOCK_AUTO_CONNECT + addr);
166     }
167 
getDockAutoConnectSetting(Context context, String addr)168     static boolean getDockAutoConnectSetting(Context context, String addr) {
169         return getSharedPreferences(context).getBoolean(KEY_DOCK_AUTO_CONNECT + addr,
170                 false);
171     }
172 
saveDockAutoConnectSetting(Context context, String addr, boolean autoConnect)173     static void saveDockAutoConnectSetting(Context context, String addr, boolean autoConnect) {
174         SharedPreferences.Editor editor = getSharedPreferences(context).edit();
175         editor.putBoolean(KEY_DOCK_AUTO_CONNECT + addr, autoConnect);
176         editor.apply();
177     }
178 
removeDockAutoConnectSetting(Context context, String addr)179     static void removeDockAutoConnectSetting(Context context, String addr) {
180         SharedPreferences.Editor editor = getSharedPreferences(context).edit();
181         editor.remove(KEY_DOCK_AUTO_CONNECT + addr);
182         editor.apply();
183     }
184 }
185