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      1 /*
      2  * Copyright (C) 2017 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.car.settings.bluetooth;
     18 
     19 import android.content.Context;
     20 import android.content.SharedPreferences;
     21 import android.content.res.Configuration;
     22 import android.text.TextUtils;
     23 import android.widget.Toast;
     24 
     25 import androidx.car.app.CarAlertDialog;
     26 
     27 import com.android.car.settings.R;
     28 import com.android.car.settings.common.Logger;
     29 import com.android.settingslib.bluetooth.LocalBluetoothAdapter;
     30 import com.android.settingslib.bluetooth.LocalBluetoothManager;
     31 import com.android.settingslib.bluetooth.LocalBluetoothManager.BluetoothManagerCallback;
     32 
     33 /**
     34  * BluetoothUtils provides an interface to the preferences
     35  * related to Bluetooth.
     36  */
     37 final class BluetoothUtils {
     38     private static final Logger LOG = new Logger(BluetoothUtils.class);
     39     private static final String SHARED_PREFERENCES_NAME = "bluetooth_settings";
     40 
     41     private static final BluetoothManagerCallback mOnInitCallback = new BluetoothManagerCallback() {
     42         @Override
     43         public void onBluetoothManagerInitialized(Context appContext,
     44                 LocalBluetoothManager bluetoothManager) {
     45             com.android.settingslib.bluetooth.Utils.setErrorListener(BluetoothUtils::showError);
     46         }
     47     };
     48 
     49     // If a device was picked from the device picker or was in discoverable mode
     50     // in the last 60 seconds, show the pairing dialogs in foreground instead
     51     // of raising notifications
     52     private static final int GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND = 60 * 1000;
     53 
     54     private static final String KEY_LAST_SELECTED_DEVICE = "last_selected_device";
     55 
     56     private static final String KEY_LAST_SELECTED_DEVICE_TIME = "last_selected_device_time";
     57 
     58     private static final String KEY_DISCOVERABLE_END_TIMESTAMP = "discoverable_end_timestamp";
     59 
     60     private BluetoothUtils() {
     61     }
     62 
     63     static void showError(Context context, String name, int messageResId) {
     64         showError(context, name, messageResId, getLocalBtManager(context));
     65     }
     66 
     67     private static void showError(Context context, String name, int messageResId,
     68             LocalBluetoothManager manager) {
     69         String message = context.getString(messageResId, name);
     70         Context activity = manager.getForegroundActivity();
     71         if (manager.isForegroundActivity()) {
     72             new CarAlertDialog.Builder(activity)
     73                     .setTitle(R.string.bluetooth_error_title)
     74                     .setBody(message)
     75                     .setPositiveButton(android.R.string.ok, null)
     76                     .create()
     77                     .show();
     78         } else {
     79             Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
     80         }
     81     }
     82 
     83     private static SharedPreferences getSharedPreferences(Context context) {
     84         return context.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
     85     }
     86 
     87     static long getDiscoverableEndTimestamp(Context context) {
     88         return getSharedPreferences(context).getLong(
     89                 KEY_DISCOVERABLE_END_TIMESTAMP, 0);
     90     }
     91 
     92     static boolean shouldShowDialogInForeground(Context context,
     93             String deviceAddress, String deviceName) {
     94         LocalBluetoothManager manager = getLocalBtManager(context);
     95         if (manager == null) {
     96             LOG.v("manager == null - do not show dialog.");
     97             return false;
     98         }
     99 
    100         // If Bluetooth Settings is visible
    101         if (manager.isForegroundActivity()) {
    102             return true;
    103         }
    104 
    105         // If in appliance mode, do not show dialog in foreground.
    106         if ((context.getResources().getConfiguration().uiMode &
    107                 Configuration.UI_MODE_TYPE_APPLIANCE) == Configuration.UI_MODE_TYPE_APPLIANCE) {
    108             LOG.v("in appliance mode - do not show dialog.");
    109             return false;
    110         }
    111 
    112         long currentTimeMillis = System.currentTimeMillis();
    113         SharedPreferences sharedPreferences = getSharedPreferences(context);
    114 
    115         // If the device was in discoverABLE mode recently
    116         long lastDiscoverableEndTime = sharedPreferences.getLong(
    117                 KEY_DISCOVERABLE_END_TIMESTAMP, 0);
    118         if ((lastDiscoverableEndTime + GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND)
    119                 > currentTimeMillis) {
    120             return true;
    121         }
    122 
    123         // If the device was discoverING recently
    124         LocalBluetoothAdapter adapter = manager.getBluetoothAdapter();
    125         if (adapter != null) {
    126             if (adapter.isDiscovering()) {
    127                 return true;
    128             }
    129             if ((adapter.getDiscoveryEndMillis() +
    130                 GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND) > currentTimeMillis) {
    131                 return true;
    132             }
    133         }
    134 
    135         // If the device was picked in the device picker recently
    136         if (deviceAddress != null) {
    137             String lastSelectedDevice = sharedPreferences.getString(
    138                     KEY_LAST_SELECTED_DEVICE, null);
    139 
    140             if (deviceAddress.equals(lastSelectedDevice)) {
    141                 long lastDeviceSelectedTime = sharedPreferences.getLong(
    142                         KEY_LAST_SELECTED_DEVICE_TIME, 0);
    143                 if ((lastDeviceSelectedTime + GRACE_PERIOD_TO_SHOW_DIALOGS_IN_FOREGROUND)
    144                         > currentTimeMillis) {
    145                     return true;
    146                 }
    147             }
    148         }
    149 
    150 
    151         if (!TextUtils.isEmpty(deviceName)) {
    152             // If the device is a custom BT keyboard specifically for this device
    153             String packagedKeyboardName = context.getString(
    154                     com.android.internal.R.string.config_packagedKeyboardName);
    155             if (deviceName.equals(packagedKeyboardName)) {
    156                 LOG.v("showing dialog for packaged keyboard");
    157                 return true;
    158             }
    159         }
    160 
    161         LOG.v("Found no reason to show the dialog - do not show dialog.");
    162         return false;
    163     }
    164 
    165     public static LocalBluetoothManager getLocalBtManager(Context context) {
    166         return LocalBluetoothManager.getInstance(context, mOnInitCallback);
    167     }
    168 }
    169