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      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 
     23 /**
     24  * LocalBluetoothPreferences provides an interface to the preferences
     25  * related to Bluetooth.
     26  */
     27 final class LocalBluetoothPreferences {
     28 //    private static final String TAG = "LocalBluetoothPreferences";
     29 
     30     private static final String SHARED_PREFERENCES_NAME = "bluetooth_settings";
     31 
     32     // If a device was picked from the device picker or was in discoverable mode
     33     // in the last 60 seconds, show the pairing dialogs in foreground instead
     34     // of raising notifications
     35     private static final int GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND = 60 * 1000;
     36 
     37     private static final String KEY_DISCOVERING_TIMESTAMP = "last_discovering_time";
     38 
     39     private static final String KEY_LAST_SELECTED_DEVICE = "last_selected_device";
     40 
     41     private static final String KEY_LAST_SELECTED_DEVICE_TIME = "last_selected_device_time";
     42 
     43     private static final String KEY_DOCK_AUTO_CONNECT = "auto_connect_to_dock";
     44 
     45     private static final String KEY_DISCOVERABLE_END_TIMESTAMP = "discoverable_end_timestamp";
     46 
     47     private LocalBluetoothPreferences() {
     48     }
     49 
     50     private static SharedPreferences getSharedPreferences(Context context) {
     51         return context.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
     52     }
     53 
     54     static long getDiscoverableEndTimestamp(Context context) {
     55         return getSharedPreferences(context).getLong(
     56                 KEY_DISCOVERABLE_END_TIMESTAMP, 0);
     57     }
     58 
     59     static boolean shouldShowDialogInForeground(Context context,
     60             String deviceAddress) {
     61         LocalBluetoothManager manager = LocalBluetoothManager.getInstance(context);
     62         if (manager == null) {
     63             return false;
     64         }
     65 
     66         // If Bluetooth Settings is visible
     67         if (manager.isForegroundActivity()) {
     68             return true;
     69         }
     70 
     71         long currentTimeMillis = System.currentTimeMillis();
     72         SharedPreferences sharedPreferences = getSharedPreferences(context);
     73 
     74         // If the device was in discoverABLE mode recently
     75         long lastDiscoverableEndTime = sharedPreferences.getLong(
     76                 KEY_DISCOVERABLE_END_TIMESTAMP, 0);
     77         if ((lastDiscoverableEndTime + GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND)
     78                 > currentTimeMillis) {
     79             return true;
     80         }
     81 
     82         // If the device was discoverING recently
     83         LocalBluetoothAdapter adapter = manager.getBluetoothAdapter();
     84         if (adapter != null && adapter.isDiscovering()) {
     85             return true;
     86         } else if ((sharedPreferences.getLong(KEY_DISCOVERING_TIMESTAMP, 0) +
     87                 GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND) > currentTimeMillis) {
     88             return true;
     89         }
     90 
     91         // If the device was picked in the device picker recently
     92         if (deviceAddress != null) {
     93             String lastSelectedDevice = sharedPreferences.getString(
     94                     KEY_LAST_SELECTED_DEVICE, null);
     95 
     96             if (deviceAddress.equals(lastSelectedDevice)) {
     97                 long lastDeviceSelectedTime = sharedPreferences.getLong(
     98                         KEY_LAST_SELECTED_DEVICE_TIME, 0);
     99                 if ((lastDeviceSelectedTime + GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND)
    100                         > currentTimeMillis) {
    101                     return true;
    102                 }
    103             }
    104         }
    105         return false;
    106     }
    107 
    108     static void persistSelectedDeviceInPicker(Context context, String deviceAddress) {
    109         SharedPreferences.Editor editor = getSharedPreferences(context).edit();
    110         editor.putString(KEY_LAST_SELECTED_DEVICE,
    111                 deviceAddress);
    112         editor.putLong(KEY_LAST_SELECTED_DEVICE_TIME,
    113                 System.currentTimeMillis());
    114         editor.apply();
    115     }
    116 
    117     static void persistDiscoverableEndTimestamp(Context context, long endTimestamp) {
    118         SharedPreferences.Editor editor = getSharedPreferences(context).edit();
    119         editor.putLong(KEY_DISCOVERABLE_END_TIMESTAMP, endTimestamp);
    120         editor.apply();
    121     }
    122 
    123     static void persistDiscoveringTimestamp(final Context context) {
    124         // Load the shared preferences and edit it on a background
    125         // thread (but serialized!).
    126         QueuedWork.singleThreadExecutor().submit(new Runnable() {
    127                 public void run() {
    128                     SharedPreferences.Editor editor = getSharedPreferences(context).edit();
    129                     editor.putLong(
    130                             KEY_DISCOVERING_TIMESTAMP,
    131                         System.currentTimeMillis());
    132                     editor.apply();
    133                 }
    134             });
    135     }
    136 
    137     static boolean hasDockAutoConnectSetting(Context context, String addr) {
    138         return getSharedPreferences(context).contains(KEY_DOCK_AUTO_CONNECT + addr);
    139     }
    140 
    141     static boolean getDockAutoConnectSetting(Context context, String addr) {
    142         return getSharedPreferences(context).getBoolean(KEY_DOCK_AUTO_CONNECT + addr,
    143                 false);
    144     }
    145 
    146     static void saveDockAutoConnectSetting(Context context, String addr, boolean autoConnect) {
    147         SharedPreferences.Editor editor = getSharedPreferences(context).edit();
    148         editor.putBoolean(KEY_DOCK_AUTO_CONNECT + addr, autoConnect);
    149         editor.apply();
    150     }
    151 
    152     static void removeDockAutoConnectSetting(Context context, String addr) {
    153         SharedPreferences.Editor editor = getSharedPreferences(context).edit();
    154         editor.remove(KEY_DOCK_AUTO_CONNECT + addr);
    155         editor.apply();
    156     }
    157 }
    158