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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.settings.bluetooth;
     18 
     19 import android.app.Notification;
     20 import android.app.NotificationManager;
     21 import android.app.NotificationChannel;
     22 import android.app.PendingIntent;
     23 import android.app.Service;
     24 import android.bluetooth.BluetoothDevice;
     25 import android.content.IntentFilter;
     26 import android.content.BroadcastReceiver;
     27 import android.content.Context;
     28 import android.content.Intent;
     29 import android.content.res.Resources;
     30 import android.os.IBinder;
     31 import android.text.TextUtils;
     32 import android.util.Log;
     33 
     34 import com.android.settings.R;
     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 String TAG = "BluetoothPairingService";
     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         pairingIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
     71         return pairingIntent;
     72     }
     73 
     74     private boolean mRegistered = false;
     75     private final BroadcastReceiver mCancelReceiver = new BroadcastReceiver() {
     76         @Override
     77         public void onReceive(Context context, Intent intent) {
     78             String action = intent.getAction();
     79             if (action.equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)) {
     80                 int bondState = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE,
     81                         BluetoothDevice.ERROR);
     82                 if ((bondState != BluetoothDevice.BOND_NONE) && (bondState != BluetoothDevice.BOND_BONDED)) {
     83                     return;
     84                 }
     85             } else if (action.equals(ACTION_DISMISS_PAIRING)) {
     86                 Log.d(TAG, "Notification cancel " + mDevice.getAddress() + " (" +
     87                         mDevice.getName() + ")");
     88                 mDevice.cancelPairingUserInput();
     89             } else {
     90                 int bondState = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE,
     91                         BluetoothDevice.ERROR);
     92                 Log.d(TAG, "Dismiss pairing for " + mDevice.getAddress() + " (" +
     93                         mDevice.getName() + "), BondState: " + bondState);
     94             }
     95             stopForeground(true);
     96             stopSelf();
     97         }
     98     };
     99 
    100     @Override
    101     public void onCreate() {
    102       NotificationManager mgr = (NotificationManager)this
    103          .getSystemService(Context.NOTIFICATION_SERVICE);
    104       NotificationChannel notificationChannel = new NotificationChannel(
    105          BLUETOOTH_NOTIFICATION_CHANNEL,
    106          this.getString(R.string.bluetooth),
    107          NotificationManager.IMPORTANCE_HIGH);
    108       mgr.createNotificationChannel(notificationChannel);
    109     }
    110 
    111     @Override
    112     public int onStartCommand(Intent intent, int flags, int startId) {
    113         if (intent == null) {
    114             Log.e(TAG, "Can't start: null intent!");
    115             stopSelf();
    116             return START_NOT_STICKY;
    117         }
    118 
    119         Resources res = getResources();
    120         Notification.Builder builder = new Notification.Builder(this,
    121             BLUETOOTH_NOTIFICATION_CHANNEL)
    122                 .setSmallIcon(android.R.drawable.stat_sys_data_bluetooth)
    123                 .setTicker(res.getString(R.string.bluetooth_notif_ticker))
    124                 .setLocalOnly(true);
    125 
    126         PendingIntent pairIntent = PendingIntent.getActivity(this, 0,
    127                 getPairingDialogIntent(this, intent), PendingIntent.FLAG_ONE_SHOT);
    128 
    129         PendingIntent dismissIntent = PendingIntent.getBroadcast(this, 0,
    130                 new Intent(ACTION_DISMISS_PAIRING), PendingIntent.FLAG_ONE_SHOT);
    131 
    132         mDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
    133 
    134         if (mDevice != null && mDevice.getBondState() != BluetoothDevice.BOND_BONDING) {
    135             Log.w(TAG, "Device " + mDevice + " not bonding: " + mDevice.getBondState());
    136             stopSelf();
    137             return START_NOT_STICKY;
    138         }
    139 
    140         String name = intent.getStringExtra(BluetoothDevice.EXTRA_NAME);
    141         if (TextUtils.isEmpty(name)) {
    142             BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
    143             name = device != null ? device.getAliasName() : res.getString(android.R.string.unknownName);
    144         }
    145 
    146         Log.d(TAG, "Show pairing notification for " + mDevice.getAddress() + " (" + name + ")");
    147 
    148         Notification.Action pairAction = new Notification.Action.Builder(0,
    149                 res.getString(R.string.bluetooth_device_context_pair_connect), pairIntent).build();
    150         Notification.Action dismissAction = new Notification.Action.Builder(0,
    151                 res.getString(android.R.string.cancel), dismissIntent).build();
    152 
    153         builder.setContentTitle(res.getString(R.string.bluetooth_notif_title))
    154                 .setContentText(res.getString(R.string.bluetooth_notif_message, name))
    155                 .setContentIntent(pairIntent)
    156                 .setDefaults(Notification.DEFAULT_SOUND)
    157                 .setColor(getColor(com.android.internal.R.color.system_notification_accent_color))
    158                 .addAction(pairAction)
    159                 .addAction(dismissAction);
    160 
    161         IntentFilter filter = new IntentFilter();
    162         filter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
    163         filter.addAction(BluetoothDevice.ACTION_PAIRING_CANCEL);
    164         filter.addAction(ACTION_DISMISS_PAIRING);
    165         registerReceiver(mCancelReceiver, filter);
    166         mRegistered = true;
    167 
    168         startForeground(NOTIFICATION_ID, builder.getNotification());
    169         return START_REDELIVER_INTENT;
    170     }
    171 
    172     @Override
    173     public void onDestroy() {
    174         if (mRegistered) {
    175             unregisterReceiver(mCancelReceiver);
    176             mRegistered = false;
    177         }
    178         stopForeground(true);
    179     }
    180 
    181     @Override
    182     public IBinder onBind(Intent intent) {
    183         // No binding.
    184         return null;
    185     }
    186 }
    187