React Native之蓝牙连接心率带设备

// 以下是处理蓝牙设备的逻辑
state = {
    scanning: false,//蓝牙是否在扫描
}

// 初始化蓝牙设备信息
initDevInfo = ()=>{
    //创建对用户的请求，以激活蓝牙
    BleManager.enableBluetooth()
        .then(() => {
            console.log('开启成功');
        })
        .catch((error) => {
            console.log('The user refuse to enable bluetooth');
        });
        
    //初始化设备
    BleManager.start({ showAlert: false }).then(() => {
        console.log('开始了')
    });
    this.onCheckLocation();

    this.handlerDiscover = bleManagerEmitter.addListener('BleManagerDiscoverPeripheral', this.handleDiscoverPeripheral);
    this.handlerStop = bleManagerEmitter.addListener('BleManagerStopScan', this.handleStopScan);
}
 //检查是否获得定位权限
	 onCheckLocation =()=>{
        if(Platform.OS === 'ios'){
            return false;
        }
        const granted =PermissionsAndroid.check(PermissionsAndroid.PERMISSIONS.ACCESS_COARSE_LOCATION)

        granted.then((data)=>{
            if(!data){
                this.requestLocationPermission()
            }
        }).catch((err)=>{
            console.log('err---------',err.toString())
        })
    }
    //申请地址权限 有些安卓设备比如华为，需要开启定位才可以扫描到蓝牙设备
    async requestLocationPermission() {
        try {