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.google.android.car.obd2app;
18 
19 import android.bluetooth.BluetoothAdapter;
20 import android.bluetooth.BluetoothDevice;
21 import android.content.Context;
22 import android.preference.ListPreference;
23 import android.util.AttributeSet;
24 
25 import java.util.ArrayList;
26 import java.util.List;
27 
28 public class BluetoothPreference extends ListPreference {
29     private static final class DeviceEntry {
30         private final String mName;
31         private final String mAddress;
32 
DeviceEntry(BluetoothDevice device)33         DeviceEntry(BluetoothDevice device) {
34             mAddress = device.getAddress();
35             if (device.getName() == null) {
36                 mName = mAddress;
37             } else {
38                 mName = device.getName();
39             }
40         }
41 
getName()42         String getName() {
43             return mName;
44         }
45 
getAddress()46         String getAddress() {
47             return mAddress;
48         }
49     }
50 
BluetoothPreference(Context context, AttributeSet attrs)51     public BluetoothPreference(Context context, AttributeSet attrs) {
52         super(context, attrs);
53 
54         BluetoothAdapter defaultAdapter = BluetoothAdapter.getDefaultAdapter();
55         List<DeviceEntry> pairedDevices = new ArrayList<>();
56         defaultAdapter
57                 .getBondedDevices()
58                 .forEach((BluetoothDevice device) -> pairedDevices.add(new DeviceEntry(device)));
59         setEntries(pairedDevices.stream().map(DeviceEntry::getName).toArray(String[]::new));
60         setEntryValues(pairedDevices.stream().map(DeviceEntry::getAddress).toArray(String[]::new));
61     }
62 
BluetoothPreference(Context context)63     public BluetoothPreference(Context context) {
64         this(context, null);
65     }
66 }
67