# Bluetooth-LE-Library---Ohos

#### 项目介绍
- 项目名称：Bluetooth-LE-Library---Ohos
- 所属系列：openharmony的第三方组件适配移植
- 功能：该库可轻松访问Bluetooth LE设备的AdRecord和RSSI值。它为iBeacons提供了其他功能。差异点因为openharmony目前暂不支持系统分享原因，通过intent分享功能没有实现。
- 项目移植状态：主功能完成
- 调用差异：无
- 开发版本：sdk6，DevEco Studio 2.2 Beta1
- 基线版本： Release v1.1.1

#### 效果演示
<img src="img/blu.gif"></img>

#### 安装教程

1.在项目根目录下的build.gradle文件中，
 ```
 allprojects {
    repositories {
        maven {
            url 'https://s01.oss.sonatype.org/content/repositories/releases/'
        }
    }
 }
```
2.在entry模块的build.gradle文件中，
 ```
 dependencies {
    implementation('com.gitee.chinasoft_ohos:Bluetooth_LE_Library:1.0.0')
    ......  
 }
```

#### 使用说明

1、您将需要以下权限来访问蓝牙硬件：

* `ohos.permission.USE_BLUETOOTH`
* `ohos.permission.LOCATION`
* `ohos.permission.DISCOVER_BLUETOOTH`

2、在MainAbilitySlice中获取蓝牙本机管理对象，并设置回调监听。
```
// 获取蓝牙本机管理对象
BluetoothHost bluetoothHost = BluetoothHost.getDefaultHost(this);
bluetoothHost.enableBt();
ScanCallback centralManagerCallback = new ScanCallback();
BleCentralManager centralManager = new BleCentralManager(this, centralManagerCallback);
```
3、开始扫描蓝牙设备，并在回调里面获取扫描到蓝牙数据
```
List<BleScanFilter> filters = new ArrayList<>();
centralManager.startScan(filters);

public class ScanCallback implements BleCentralManagerCallback {
        List<BleScanResult> results = new ArrayList<>();

        @Override
        public void scanResultEvent(BleScanResult resultCode) {
            // 对扫描结果进行处理
            results.add(resultCode);
            int rssi = resultCode.getRssi();
            byte[] scanRecord = resultCode.getRawData();
            BluetoothLeDevice deviceLe = new BluetoothLeDevice(resultCode,
                    rssi, scanRecord, System.currentTimeMillis());
            getUITaskDispatcher().asyncDispatch(() -> {
                for (int index = 0; index < listDevice.size(); index++) {
                    if (deviceLe.getAddress().equals(listDevice.get(index).getAddress())) {
                        BluetoothLeDevice item = listDevice.get(index);
                        item.updateRssiReading(System.currentTimeMillis(), rssi);
                        return;
                    }
                }
            });
        }

        @Override
        public void scanFailedEvent(int resultCode) {
        }

        @Override
        public void groupScanResultsEvent(List<BleScanResult> list) {
        }
    }
```

支持功能：
```
* getAddress() : Gets the MAC Address of the device
* getAdRecordStore(): Gives access to a device's Ad Records
* getDevice(): Gives access to the standard BluetoothDevice object
* getFirstRssi(): Retrieves the RSSI value which was used when the object was created
* getFirstTimestamp() : Retrieves the timestamp (in millis) which was used when the object was created
* getRssi() : Gets the current RSSI measurement (see note below).
* getScanRecord() : Retrieves the RAW scan record array
* getTimestamp() : Gets the timestamp of the last RSSI measurement
* getRunningAverageRssi() : Retrieves the internally calculated running average RSSI value (see note below).
```

#### 测试信息

CodeCheck代码测试无异常

CloudTest代码测试无异常

病毒安全检测通过

当前版本demo功能与原组件基本无差异

#### 版本迭代

- 1.0.0

#### 版权和许可信息
```
Author: [Alexandros Schillings](https://github.com/alt236).

The Accuracy calculation algorithm was taken from: http://stackoverflow.com/questions/20416218/understanding-ibeacon-distancing
The AdRecord parser was taken from: https://github.com/devunwired/accessory-samples

All logos are the property of their respective owners.

The code in this project is licensed under the Apache Software License 2.0.

Copyright (c) 2014-2017 Alexandros Schillings.
```