forked from upstream-mirrors/OpenTracks
Dennis Guse
89 lines
3.0 KiB
Java
89 lines
3.0 KiB
Java
/*
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* Copyright 2010 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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package de.dennisguse.opentracks.util;
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import android.bluetooth.BluetoothAdapter;
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import android.bluetooth.BluetoothGattCharacteristic;
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import android.os.Handler;
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import android.os.Looper;
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import android.util.Log;
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import java.util.ArrayList;
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import java.util.UUID;
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/**
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* Utilities for dealing with bluetooth devices.
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*
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* @author Rodrigo Damazio
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*/
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public class BluetoothUtils {
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public static final UUID HEART_RATE_SERVICE_UUID = new UUID(0x180D00001000L, 0x800000805f9b34fbL);
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private BluetoothUtils() {
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}
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public static BluetoothAdapter getDefaultBluetoothAdapter(final String TAG) {
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// If from the main application thread, return directly
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if (Thread.currentThread().equals(Looper.getMainLooper().getThread())) {
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return BluetoothAdapter.getDefaultAdapter();
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}
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// Get the default adapter from the main application thread
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final ArrayList<BluetoothAdapter> adapters = new ArrayList<>(1);
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final Object mutex = new Object();
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Handler handler = new Handler(Looper.getMainLooper());
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handler.post(new Runnable() {
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@Override
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public void run() {
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adapters.add(BluetoothAdapter.getDefaultAdapter());
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synchronized (mutex) {
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mutex.notify();
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}
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}
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});
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while (adapters.isEmpty()) {
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synchronized (mutex) {
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try {
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mutex.wait(UnitConversions.ONE_SECOND);
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} catch (InterruptedException e) {
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Log.e(TAG, "Interrupted while waiting for default bluetooth adapter", e);
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}
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}
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}
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if (adapters.get(0) == null) {
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Log.w(TAG, "No bluetooth adapter found.");
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}
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return adapters.get(0);
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}
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public static boolean hasBluetooth(final String TAG) {
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return BluetoothUtils.getDefaultBluetoothAdapter(TAG) != null;
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}
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public static int parseHeartRate(BluetoothGattCharacteristic characteristic) {
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//DOCUMENTATION https://www.bluetooth.com/specifications/gatt/characteristics/
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byte[] raw = characteristic.getValue();
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int index = ((raw[0] & 0x1) == 1) ? 2 : 1;
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int format = (index == 1) ? BluetoothGattCharacteristic.FORMAT_UINT8 : BluetoothGattCharacteristic.FORMAT_UINT16;
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return characteristic.getIntValue(format, index);
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}
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}
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