From e5ac56c9a8671f967dd908fe7fc6704780521aa1 Mon Sep 17 00:00:00 2001 From: Joseph Pirozzo Date: Wed, 10 Jan 2018 15:05:57 -0800 Subject: Bluetooth Fast Pair Enable advertisement of head unit as a connectable device via Fast Pair. The fastPairModelId stored in the config file must be overriden by vendors to their specific device Id. Bug: 38321459 Test: runtest -x packages/services/Car/tests/carservice_test/ -c com.android.car.FastPairProviderTest Disable Restrictions and move Android phone close to Bluetooth Antenna, observe Fast Pair dialog on phone. Change-Id: Iae707849537c3ef3b16a2b0738a72007d3961741 --- service/src/com/android/car/FastPairProvider.java | 125 ++++++++++++++++++++++ 1 file changed, 125 insertions(+) create mode 100644 service/src/com/android/car/FastPairProvider.java (limited to 'service/src/com/android/car/FastPairProvider.java') diff --git a/service/src/com/android/car/FastPairProvider.java b/service/src/com/android/car/FastPairProvider.java new file mode 100644 index 0000000000..ff5973236f --- /dev/null +++ b/service/src/com/android/car/FastPairProvider.java @@ -0,0 +1,125 @@ +/* + * Copyright (C) 2018 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.android.car; + +import android.bluetooth.BluetoothAdapter; +import android.bluetooth.BluetoothManager; + +import android.bluetooth.le.AdvertiseCallback; +import android.bluetooth.le.AdvertiseData; +import android.bluetooth.le.AdvertiseSettings; +import android.bluetooth.le.BluetoothLeAdvertiser; +import android.content.Context; +import android.content.res.Resources; +import android.os.ParcelUuid; +import android.util.Log; + +import java.nio.ByteBuffer; +import java.nio.ByteOrder; +import java.util.Arrays; + +/** + * An advertiser for the Bluetooth LE based Fast Pair service. + * FastPairProvider enables easy Bluetooth pairing between a peripheral and a phone participating in + * the Fast Pair Seeker role. When the seeker finds a compatible peripheral a notification prompts + * the user to begin pairing if desired. A peripheral should call startAdvertising when it is + * appropriate to pair, and stopAdvertising when pairing is complete or it is no longer appropriate + * to pair. + */ +class FastPairProvider { + + private static final String TAG = "FastPairProvider"; + private static final boolean DBG = Utils.DBG; + + // Service ID assigned for FastPair. + private static final ParcelUuid FastPairServiceUuid = ParcelUuid + .fromString("0000FE2C-0000-1000-8000-00805f9b34fb"); + + private AdvertiseSettings mSettings; + private AdvertiseData mData; + private BluetoothLeAdvertiser mBluetoothLeAdvertiser; + private AdvertiseCallback mAdvertiseCallback; + + + FastPairProvider(Context context) { + Resources res = context.getResources(); + int modelId = res.getInteger(R.integer.fastPairModelId); + if (modelId == 0) { + Log.w(TAG, "Model ID undefined, disabling"); + return; + } + + BluetoothManager bluetoothManager = (BluetoothManager) context.getSystemService( + Context.BLUETOOTH_SERVICE); + if (bluetoothManager != null) { + BluetoothAdapter bluetoothAdapter = bluetoothManager.getAdapter(); + if (bluetoothAdapter != null) { + mBluetoothLeAdvertiser = bluetoothAdapter.getBluetoothLeAdvertiser(); + } + } + + AdvertiseSettings.Builder settingsBuilder = new AdvertiseSettings.Builder(); + settingsBuilder.setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_LOW_LATENCY); + settingsBuilder.setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_HIGH); + settingsBuilder.setConnectable(true); + settingsBuilder.setTimeout(0); + mSettings = settingsBuilder.build(); + + AdvertiseData.Builder dataBuilder = new AdvertiseData.Builder(); + ByteBuffer modelIdBytes = ByteBuffer.allocate(4).order(ByteOrder.LITTLE_ENDIAN).putInt( + modelId); + byte[] fastPairServiceData = Arrays.copyOfRange(modelIdBytes.array(), 0, 3); + dataBuilder.addServiceData(FastPairServiceUuid, fastPairServiceData); + dataBuilder.setIncludeTxPowerLevel(true).build(); + mData = dataBuilder.build(); + + mAdvertiseCallback = new FastPairAdvertiseCallback(); + } + + /* register the BLE advertisement using the model id provided during construction */ + boolean startAdvertising() { + if (mBluetoothLeAdvertiser != null) { + mBluetoothLeAdvertiser.startAdvertising(mSettings, mData, mAdvertiseCallback); + return true; + } + return false; + } + + /* unregister the BLE advertisement. */ + boolean stopAdvertising() { + if (mBluetoothLeAdvertiser != null) { + mBluetoothLeAdvertiser.stopAdvertising(mAdvertiseCallback); + return true; + } + return false; + } + + /* Callback to handle status when advertising starts. */ + private class FastPairAdvertiseCallback extends AdvertiseCallback { + @Override + public void onStartFailure(int errorCode) { + super.onStartFailure(errorCode); + if (DBG) Log.d(TAG, "Advertising failed"); + } + + @Override + public void onStartSuccess(AdvertiseSettings settingsInEffect) { + super.onStartSuccess(settingsInEffect); + if (DBG) Log.d(TAG, "Advertising successfully started"); + } + } +} -- cgit v1.2.3