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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.app.Notification;
     20 import android.app.NotificationChannel;
     21 import android.app.NotificationManager;
     22 import android.app.PendingIntent;
     23 import android.app.Service;
     24 import android.bluetooth.BluetoothDevice;
     25 import android.content.BroadcastReceiver;
     26 import android.content.Context;
     27 import android.content.Intent;
     28 import android.content.IntentFilter;
     29 import android.content.res.Resources;
     30 import android.os.IBinder;
     31 import android.text.TextUtils;
     32 
     33 import com.android.car.settings.R;
     34 import com.android.car.settings.common.Logger;
     35 
     36 /**
     37  * BluetoothPairingService shows a notification if there is a pending bond request
     38  * which can launch the appropriate pairing dialog when tapped.
     39  */
     40 public final class BluetoothPairingService extends Service {
     41 
     42     private static final int NOTIFICATION_ID = android.R.drawable.stat_sys_data_bluetooth;
     43 
     44     private static final String ACTION_DISMISS_PAIRING =
     45             "com.android.settings.bluetooth.ACTION_DISMISS_PAIRING";
     46 
     47     private static final String BLUETOOTH_NOTIFICATION_CHANNEL =
     48             "bluetooth_notification_channel";
     49 
     50     private static final Logger LOG = new Logger(BluetoothPairingService.class);
     51 
     52     private BluetoothDevice mDevice;
     53 
     54     public static Intent getPairingDialogIntent(Context context, Intent intent) {
     55         BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
     56         int type = intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT,
     57                 BluetoothDevice.ERROR);
     58         Intent pairingIntent = new Intent();
     59         pairingIntent.setClass(context, BluetoothPairingDialog.class);
     60         pairingIntent.putExtra(BluetoothDevice.EXTRA_DEVICE, device);
     61         pairingIntent.putExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT, type);
     62         if (type == BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION ||
     63                 type == BluetoothDevice.PAIRING_VARIANT_DISPLAY_PASSKEY ||
     64                 type == BluetoothDevice.PAIRING_VARIANT_DISPLAY_PIN) {
     65             int pairingKey = intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_KEY,
     66                     BluetoothDevice.ERROR);
     67             pairingIntent.putExtra(BluetoothDevice.EXTRA_PAIRING_KEY, pairingKey);
     68         }
     69         pairingIntent.setAction(BluetoothDevice.ACTION_PAIRING_REQUEST);
     70         return pairingIntent;
     71     }
     72 
     73     private boolean mRegistered = false;
     74     private final BroadcastReceiver mCancelReceiver = new BroadcastReceiver() {
     75         @Override
     76         public void onReceive(Context context, Intent intent) {
     77             String action = intent.getAction();
     78             if (action.equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)) {
     79                 int bondState = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE,
     80                         BluetoothDevice.ERROR);
     81                 if ((bondState != BluetoothDevice.BOND_NONE) && (bondState != BluetoothDevice.BOND_BONDED)) {
     82                     return;
     83                 }
     84             } else if (action.equals(ACTION_DISMISS_PAIRING)) {
     85                 LOG.d("Notification cancel " + mDevice.getAddress() + " ("
     86                         + mDevice.getName() + ")");
     87                 mDevice.cancelPairingUserInput();
     88             } else {
     89                 int bondState = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE,
     90                         BluetoothDevice.ERROR);
     91                 LOG.d("Dismiss pairing for " + mDevice.getAddress() + " ("
     92                         + mDevice.getName() + "), BondState: " + bondState);
     93             }
     94             stopForeground(true);
     95             stopSelf();
     96         }
     97     };
     98 
     99     @Override
    100     public void onCreate() {
    101       NotificationManager mgr = (NotificationManager)this
    102          .getSystemService(Context.NOTIFICATION_SERVICE);
    103       NotificationChannel notificationChannel = new NotificationChannel(
    104          BLUETOOTH_NOTIFICATION_CHANNEL,
    105          this.getString(R.string.bluetooth),
    106          NotificationManager.IMPORTANCE_HIGH);
    107       mgr.createNotificationChannel(notificationChannel);
    108     }
    109 
    110     @Override
    111     public int onStartCommand(Intent intent, int flags, int startId) {
    112         if (intent == null) {
    113             LOG.e("Can't start: null intent!");
    114             stopSelf();
    115             return START_NOT_STICKY;
    116         }
    117 
    118         Resources res = getResources();
    119         Notification.Builder builder = new Notification.Builder(this,
    120             BLUETOOTH_NOTIFICATION_CHANNEL)
    121                 .setSmallIcon(android.R.drawable.stat_sys_data_bluetooth)
    122                 .setTicker(res.getString(R.string.bluetooth_notif_ticker))
    123                 .setLocalOnly(true);
    124 
    125         PendingIntent pairIntent = PendingIntent.getActivity(this, 0,
    126                 getPairingDialogIntent(this, intent), PendingIntent.FLAG_ONE_SHOT);
    127 
    128         PendingIntent dismissIntent = PendingIntent.getBroadcast(this, 0,
    129                 new Intent(ACTION_DISMISS_PAIRING), PendingIntent.FLAG_ONE_SHOT);
    130 
    131         mDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
    132 
    133         if (mDevice != null && mDevice.getBondState() != BluetoothDevice.BOND_BONDING) {
    134             LOG.w("Device " + mDevice + " not bonding: " + mDevice.getBondState());
    135             stopSelf();
    136             return START_NOT_STICKY;
    137         }
    138 
    139         String name = intent.getStringExtra(BluetoothDevice.EXTRA_NAME);
    140         if (TextUtils.isEmpty(name)) {
    141             BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
    142             name = device != null ? device.getAliasName() : res.getString(android.R.string.unknownName);
    143         }
    144 
    145         LOG.d("Show pairing notification for " + mDevice.getAddress() + " (" + name + ")");
    146 
    147         Notification.Action pairAction = new Notification.Action.Builder(0,
    148                 res.getString(R.string.bluetooth_device_context_pair_connect), pairIntent).build();
    149         Notification.Action dismissAction = new Notification.Action.Builder(0,
    150                 res.getString(android.R.string.cancel), dismissIntent).build();
    151 
    152         builder.setContentTitle(res.getString(R.string.bluetooth_notif_title))
    153                 .setContentText(res.getString(R.string.bluetooth_notif_message, name))
    154                 .setContentIntent(pairIntent)
    155                 .setDefaults(Notification.DEFAULT_SOUND)
    156                 .setColor(getColor(com.android.internal.R.color.system_notification_accent_color))
    157                 .addAction(pairAction)
    158                 .addAction(dismissAction);
    159 
    160         IntentFilter filter = new IntentFilter();
    161         filter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
    162         filter.addAction(BluetoothDevice.ACTION_PAIRING_CANCEL);
    163         filter.addAction(ACTION_DISMISS_PAIRING);
    164         registerReceiver(mCancelReceiver, filter);
    165         mRegistered = true;
    166 
    167         startForeground(NOTIFICATION_ID, builder.getNotification());
    168         return START_REDELIVER_INTENT;
    169     }
    170 
    171     @Override
    172     public void onDestroy() {
    173         if (mRegistered) {
    174             unregisterReceiver(mCancelReceiver);
    175             mRegistered = false;
    176         }
    177         stopForeground(true);
    178     }
    179 
    180     @Override
    181     public IBinder onBind(Intent intent) {
    182         // No binding.
    183         return null;
    184     }
    185 }
    186