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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 import android.content.res.Configuration;
     23 
     24 /**
     25  * LocalBluetoothPreferences provides an interface to the preferences
     26  * related to Bluetooth.
     27  */
     28 final class LocalBluetoothPreferences {
     29 //    private static final String TAG = "LocalBluetoothPreferences";
     30 
     31     private static final String SHARED_PREFERENCES_NAME = "bluetooth_settings";
     32 
     33     // If a device was picked from the device picker or was in discoverable mode
     34     // in the last 60 seconds, show the pairing dialogs in foreground instead
     35     // of raising notifications
     36     private static final int GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND = 60 * 1000;
     37 
     38     private static final String KEY_DISCOVERING_TIMESTAMP = "last_discovering_time";
     39 
     40     private static final String KEY_LAST_SELECTED_DEVICE = "last_selected_device";
     41 
     42     private static final String KEY_LAST_SELECTED_DEVICE_TIME = "last_selected_device_time";
     43 
     44     private static final String KEY_DOCK_AUTO_CONNECT = "auto_connect_to_dock";
     45 
     46     private static final String KEY_DISCOVERABLE_END_TIMESTAMP = "discoverable_end_timestamp";
     47 
     48     private LocalBluetoothPreferences() {
     49     }
     50 
     51     private static SharedPreferences getSharedPreferences(Context context) {
     52         return context.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
     53     }
     54 
     55     static long getDiscoverableEndTimestamp(Context context) {
     56         return getSharedPreferences(context).getLong(
     57                 KEY_DISCOVERABLE_END_TIMESTAMP, 0);
     58     }
     59 
     60     static boolean shouldShowDialogInForeground(Context context,
     61             String deviceAddress) {
     62         LocalBluetoothManager manager = LocalBluetoothManager.getInstance(context);
     63         if (manager == null) {
     64             return false;
     65         }
     66 
     67         // If Bluetooth Settings is visible
     68         if (manager.isForegroundActivity()) {
     69             return true;
     70         }
     71 
     72         // If in appliance mode, do not show dialog in foreground.
     73         if ((context.getResources().getConfiguration().uiMode &
     74                 Configuration.UI_MODE_TYPE_APPLIANCE) == Configuration.UI_MODE_TYPE_APPLIANCE) {
     75             return false;
     76         }
     77 
     78         long currentTimeMillis = System.currentTimeMillis();
     79         SharedPreferences sharedPreferences = getSharedPreferences(context);
     80 
     81         // If the device was in discoverABLE mode recently
     82         long lastDiscoverableEndTime = sharedPreferences.getLong(
     83                 KEY_DISCOVERABLE_END_TIMESTAMP, 0);
     84         if ((lastDiscoverableEndTime + GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND)
     85                 > currentTimeMillis) {
     86             return true;
     87         }
     88 
     89         // If the device was discoverING recently
     90         LocalBluetoothAdapter adapter = manager.getBluetoothAdapter();
     91         if (adapter != null && adapter.isDiscovering()) {
     92             return true;
     93         } else if ((sharedPreferences.getLong(KEY_DISCOVERING_TIMESTAMP, 0) +
     94                 GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND) > currentTimeMillis) {
     95             return true;
     96         }
     97 
     98         // If the device was picked in the device picker recently
     99         if (deviceAddress != null) {
    100             String lastSelectedDevice = sharedPreferences.getString(
    101                     KEY_LAST_SELECTED_DEVICE, null);
    102 
    103             if (deviceAddress.equals(lastSelectedDevice)) {
    104                 long lastDeviceSelectedTime = sharedPreferences.getLong(
    105                         KEY_LAST_SELECTED_DEVICE_TIME, 0);
    106                 if ((lastDeviceSelectedTime + GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND)
    107                         > currentTimeMillis) {
    108                     return true;
    109                 }
    110             }
    111         }
    112         return false;
    113     }
    114 
    115     static void persistSelectedDeviceInPicker(Context context, String deviceAddress) {
    116         SharedPreferences.Editor editor = getSharedPreferences(context).edit();
    117         editor.putString(KEY_LAST_SELECTED_DEVICE,
    118                 deviceAddress);
    119         editor.putLong(KEY_LAST_SELECTED_DEVICE_TIME,
    120                 System.currentTimeMillis());
    121         editor.apply();
    122     }
    123 
    124     static void persistDiscoverableEndTimestamp(Context context, long endTimestamp) {
    125         SharedPreferences.Editor editor = getSharedPreferences(context).edit();
    126         editor.putLong(KEY_DISCOVERABLE_END_TIMESTAMP, endTimestamp);
    127         editor.apply();
    128     }
    129 
    130     static void persistDiscoveringTimestamp(final Context context) {
    131         // Load the shared preferences and edit it on a background
    132         // thread (but serialized!).
    133         QueuedWork.singleThreadExecutor().submit(new Runnable() {
    134                 public void run() {
    135                     SharedPreferences.Editor editor = getSharedPreferences(context).edit();
    136                     editor.putLong(
    137                             KEY_DISCOVERING_TIMESTAMP,
    138                         System.currentTimeMillis());
    139                     editor.apply();
    140                 }
    141             });
    142     }
    143 
    144     static boolean hasDockAutoConnectSetting(Context context, String addr) {
    145         return getSharedPreferences(context).contains(KEY_DOCK_AUTO_CONNECT + addr);
    146     }
    147 
    148     static boolean getDockAutoConnectSetting(Context context, String addr) {
    149         return getSharedPreferences(context).getBoolean(KEY_DOCK_AUTO_CONNECT + addr,
    150                 false);
    151     }
    152 
    153     static void saveDockAutoConnectSetting(Context context, String addr, boolean autoConnect) {
    154         SharedPreferences.Editor editor = getSharedPreferences(context).edit();
    155         editor.putBoolean(KEY_DOCK_AUTO_CONNECT + addr, autoConnect);
    156         editor.apply();
    157     }
    158 
    159     static void removeDockAutoConnectSetting(Context context, String addr) {
    160         SharedPreferences.Editor editor = getSharedPreferences(context).edit();
    161         editor.remove(KEY_DOCK_AUTO_CONNECT + addr);
    162         editor.apply();
    163     }
    164 }
    165