- 需求的场景描述（希望解决的问题）小米8 手机上 运行小程序 扫描周围的蓝牙设备.

同一时刻下  荣耀九 扫描周围的设备

为什么小米8手机蓝牙调试工具 不能完全检测 周围的蓝牙状态

- 希望提供的能力

• , 如果你什么都不说，我也不知道怎么回答你呀
  // pages/index/index.js var app = getApp(); var utils = require("../../utils/util.js"); function inArray(arr, key, val) { for (let i = 0; i < arr.length; i++) { if (arr[i][key] === val) { return i; } } return -1; } Page({ /**   * 页面的初始数据   */ data: { textLog: "", isopen: false, //蓝牙适配器是否已打开 devices: [], connected: false, chs: [] }, /**   * 生命周期函数--监听页面加载   */ onLoad: function(options) { var that = this; console.log("用户信息", app.globalData.userInfo); var log = "获取微信版本号:" + app.getWxVersion() + "n" + "获取客户端系统:" + app.getPlatform() + "n" + "系统版本:" + app.getSystem() + "n"; that.setData({ textLog: log }); //获取当前设备平台以及微信版本 if (app.getPlatform() == 'android' & utils.versionCompare('6.5.7', app.getWxVersion())) { wx.showModal({ title: '提示', content: '当前微信版本过低，请更新至最新版本', showCancel: false, success: function(res) { if (res.confirm) { that.backPage(); } } }) } else if (app.getPlatform() == 'android' & utils.versionCompare('4.3.0', app.getSystem())) { wx.showModal({ title: '提示', content: '当前系统版本过低，请更新至Android4.3以上版本', showCancel: false, success: function(res) { if (res.confirm) { that.backPage(); } } }) } else if (app.getPlatform() == 'ios' & utils.versionCompare('6.5.6', app.getWxVersion())) { wx.showModal({ title: '提示', content: '当前微信版本过低，请更新至最新版本', showCancel: false, success: function(res) { if (res.confirm) { that.backPage(); } } }) } }, /**   * 生命周期函数--监听页面卸载   */ onUnload: function() { console.log("生命周期函数--监听页面卸载"); this.closeBluetoothAdapter(); //关闭蓝牙模块，使其进入未初始化状态。 }, //退出页面 backPage: function() { // wx.navigateBack({ //   delta: -1 // }) }, //清空log日志 startClear: function() { var that = this; that.setData({ textLog: "" }); }, /**   * 流程：   * 1.先初始化蓝牙适配器，   * 2.获取本机蓝牙适配器的状态，   * 3.开始搜索，当停止搜索以后在开始搜索，就会触发蓝牙是配置状态变化的事件，   * 4.搜索完成以后获取所有已经发现的蓝牙设备，就可以将devices中的设备Array取出来，   * 5.然后就可以得到所有已经连接的设备了   */ startScan: function() { var that = this; that._discoveryStarted = false; if (that.data.isopen) { //如果已初始化小程序蓝牙模块，则直接执行扫描 that.getBluetoothAdapterState(); } else { that.openBluetoothAdapter(); } }, //初始化小程序蓝牙模块 openBluetoothAdapter: function() { var that = this; wx.openBluetoothAdapter({ success: function(res) { var log = that.data.textLog + "打开蓝牙适配器成功！n"; that.setData({ textLog: log, isopen: true }); that.getBluetoothAdapterState(); }, fail: function(err) { isopen: true; app.showModal1("蓝牙开关未开启"); var log = that.data.textLog + "蓝牙开关未开启 n"; that.setData({ textLog: log }); } }) //监听蓝牙适配器状态变化事件 wx.onBluetoothAdapterStateChange(function(res) { console.log('onBluetoothAdapterStateChange', res) var isDvailable = res.available; //蓝牙适配器是否可用 if (isDvailable) { that.getBluetoothAdapterState(); } else { that.stopBluetoothDevicesDiscovery(); //停止搜索 that.setData({ devices: [] }); app.showModal1("蓝牙开关未开启"); } }) }, //关闭蓝牙模块，使其进入未初始化状态。 closeBluetoothAdapter: function() { wx.closeBluetoothAdapter() this._discoveryStarted = false }, //获取本机蓝牙适配器状态 getBluetoothAdapterState: function() { var that = this; wx.getBluetoothAdapterState({ success: function(res) { var isDiscov = res.discovering; //是否正在搜索设备 var isDvailable = res.available; //蓝牙适配器是否可用 if (isDvailable) { var log = that.data.textLog + "本机蓝牙适配器状态：可用 n"; that.setData({ textLog: log }); if (!isDiscov) { that.startBluetoothDevicesDiscovery(); } else { var log = that.data.textLog + "已在搜索设备 n"; that.setData({ textLog: log }); } } } }) }, //开始扫描附近的蓝牙外围设备。 //注意，该操作比较耗费系统资源，请在搜索并连接到设备后调用 stop 方法停止搜索。 startBluetoothDevicesDiscovery: function() { var that = this; if (that._discoveryStarted) { return } that._discoveryStarted = true; app.showLoading("正在扫描.."); var log = that.data.textLog + "正在扫描..n"; that.setData({ textLog: log }); setTimeout(function() { wx.hideLoading(); //隐藏loading }, 3000); wx.startBluetoothDevicesDiscovery({ services: [], allowDuplicatesKey: true, //是否允许重复上报同一设备, 如果允许重复上报，则onDeviceFound 方法会多次上报同一设备，但是 RSSI(信号) 值会有不同 interval: 0,//上报设备的间隔。0 表示找到新设备立即上报，其他数值根据传入的间隔上报。20190225 success: function(res) { var log = that.data.textLog + "扫描附近的蓝牙外围设备成功，准备监听寻找新设备:" + res + "n"; that.setData({ textLog: log }); that.onBluetoothDeviceFound(); //监听寻找到新设备的事件 } }); }, /*              一直寻找 20190225  //停止搜寻附近的蓝牙外围设备。若已经找到需要的蓝牙设备并不需要继续搜索时，建议调用该接口停止蓝牙搜索。 stopBluetoothDevicesDiscovery: function() {    var that = this;    var log = that.data.textLog + "停止搜寻附近的蓝牙外围设备 n";    that.setData({      textLog: log    });    wx.stopBluetoothDevicesDiscovery()  },*/ //监听寻找到新设备的事件 onBluetoothDeviceFound: function() { var that = this; wx.onBluetoothDeviceFound(function(res) { res.devices.forEach(function(device) { if (!device.name & !device.localName) { return } const foundDevices = that.data.devices; const idx = inArray(foundDevices, 'deviceId', device.deviceId); const data = {}; if (idx === -1) { data[`devices[${foundDevices.length}]`] = device } else { data[`devices[${idx}]`] = device } that.setData(data) }) }) }, //连接低功耗蓝牙设备。 createBLEConnection: function(e) { var that = this; const ds = e.currentTarget.dataset; const devId = ds.deviceId; //设备UUID const name = ds.name; //设备名 // that.stopConnectDevices();  //配对之前先断开已连接设备 // app.showLoading("正在连接，请稍后"); var log = that.data.textLog + "正在连接，请稍后..n"; that.setData({ textLog: log }); app.showLoading("连接中.."); wx.createBLEConnection({ deviceId: devId, success: function(res) { wx.hideLoading(); //隐藏loading var log = that.data.textLog + "配对成功,获取服务..n"; that.setData({ textLog: log, connected: true, name, devId, }); that.getBLEDeviceServices(devId) }, fail: function(err) { wx.hideLoading(); //隐藏loading var log = that.data.textLog + "连接失败，错误码：" + err.errCode + "n"; that.setData({ textLog: log }); if (err.errCode === 10012) { app.showModal1("连接超时,请重试!"); } else if (err.errCode === 10013) { app.showModal1("连接失败,蓝牙地址无效!"); } else { app.showModal1("连接失败,请重试!"); // + err.errCode10003原因多种：蓝牙设备未开启或异常导致无法连接;蓝牙设备被占用或者上次蓝牙连接未断开导致无法连接 } that.closeBLEConnection() }, }); that.stopBluetoothDevicesDiscovery(); //停止搜索 }, //断开与低功耗蓝牙设备的连接 closeBLEConnection: function() { wx.closeBLEConnection({ deviceId: this.data.devId }) this.setData({ connected: false, chs: [], canWrite: false, }) }, //获取蓝牙设备所有 service（服务） getBLEDeviceServices: function(devId) { var that = this; wx.getBLEDeviceServices({ deviceId: devId, success: function(res) { for (let i = 0; i < res.services.length; i++) { if (res.services[i].isPrimary) { //该服务是否为主服务 var s = res.services[i].uuid; var log = that.data.textLog + "该服务是为主服务:" + res.services[i].uuid + "n"; that.setData({ textLog: log }); wx.navigateTo({ url: '/pages/functionPage/functionPage?name=' + encodeURIComponent(that.data.name) + '&deviceId=' + encodeURIComponent(devId) + '&serviceId=' + encodeURIComponent(res.services[i].uuid) }); return } } } }) }, //关于 aboutClick: function() { wx.navigateTo({ url: '/pages/about/about' }); } }) , 说的貌似很有深意，你能一条一条说么？
  , 如果你什么都不说，我也不知道怎么回答你呀