我使用的uni-app

<template>

    <view class="bluetooth">

        <!-- 发送数据 -->

        <view class="send" v-if="send_data_onoff">

            <view class="uni-textarea">

                <textarea placeholder-style="color:#F76260" v-model="send_data_list" placeholder="请输入发送数据"/>

                <view @tap="send_data" class="fasong">发送</view>

            </view>

        </view>

        <!-- 没有匹配的蓝牙设备 -->

        <view class="no_match_bluetooth_list" v-if="no_match_list.length!=0">

            <view class="h1">已搜索的蓝牙：</view>

            <block  v-for="(item,index) in no_match_list" :key="index">

                <view class="uni-list" @tap="search_bluetooth(item.SN)">

                    <view class="uni-list-cell" hover-class="uni-list-cell-hover">

                        <view class="uni-list-cell-navigate uni-navigate-right uni-media-list ">

                            <view class="uni-media-list-body">

                                <view>蓝牙名称:{{item.name}}</view>

                                <view>SN:{{item.SN}}</view>

                            </view>

                        </view>

                    </view>

                </view>

            </block>

        </view>

        <!-- 已匹配的蓝牙设备 -->

        <view class="no_match_bluetooth_list" v-if="match_list.length!=0">

            <view class="h1">已匹配的蓝牙：</view>

            <block  v-for="(item,index) in match_list" :key="index">

                <view class="uni-list" @tap="print(item.SN)">

                    <view class="uni-list-cell" hover-class="uni-list-cell-hover">

                        <view class="uni-list-cell-navigate uni-navigate-right uni-media-list ">

                            <view class="uni-media-list-body">

                                <view>蓝牙名称:{{item.name}}</view>

                                <view>SN:{{item.SN}}</view>

                            </view>

                        </view>

                    </view>

                </view>

            </block>

        </view>

        <view class="btn">

            <view class="btn_1" @tap="open_bluetooth">打开蓝牙</view>

            <view class="btn_2" @tap="close_bluetooth">关闭蓝牙</view>

            <view class="btn_3" @tap="search_bluetooth">搜索蓝牙</view>

        </view>

    </view>

</template>

<script>

    var main, Context, BluetoothManager, BluetoothAdapter, BManager, BAdapter,BluetoothDevice,IntentFilter,bluetoothSocket,device;

    export default {

        data() {

            return {

                bArray:[],//用于搜索蓝牙去重用的

                no_match_list:[],//没有配对的蓝牙列表

                match_list:[],//已配对的蓝牙列表

                send_data_onoff:false,

                send_data_list:'',//要发送的数据

            };

        },

        onShow() {

            //获取android应用Activity对象

            main = plus.android.runtimeMainActivity();

            Context = plus.android.importClass("android.content.Context");

            BManager = main.getSystemService(Context.BLUETOOTH_SERVICE);

            //蓝牙适配器

            BluetoothAdapter = plus.android.importClass("android.bluetooth.BluetoothAdapter");

            //蓝牙本地适配器

            BAdapter = BluetoothAdapter.getDefaultAdapter();

            //蓝牙设备

            BluetoothDevice = plus.android.importClass('android.bluetooth.BluetoothDevice');

            //过滤器

            IntentFilter = plus.android.importClass('android.content.IntentFilter');

        },

        methods:{

            /**

            * 根据蓝牙地址，连接设备

            * @param {Object} address

            * @return {Boolean}

            */

            print(address){

                console.log(address)

                let that=this

                uni.showModal({

                    title: '提示',

                    content: '是连接此蓝牙？',

                    success: function (res) {

                        if (res.confirm) {

                            console.log('用户点击确定');

                            uni.showLoading({

                                title: '蓝牙连接中...'

                            });

                            that.print_bluetooth(address)

                        }

                    }

                });

            },

            //连接蓝牙

            print_bluetooth(mac_address){

                let that=this

                uni.hideLoading()

                let UUID = plus.android.importClass("java.util.UUID");

                let uuid = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");

                device = BAdapter.getRemoteDevice(mac_address);

                plus.android.importClass(device);

                bluetoothSocket = device.createInsecureRfcommSocketToServiceRecord(uuid);

                plus.android.importClass(bluetoothSocket);

                if (!bluetoothSocket.isConnected()) {

                    console.log('检测到设备未连接，尝试连接....');

                    bluetoothSocket.connect();

                }

                console.log('设备已连接');

                // 打开输入发送数据

                that.send_data_onoff=true;

            },

            //发送蓝牙数据

            send_data(){

                let that=this

                console.log()

                if (bluetoothSocket.isConnected()) {

                    console.log()

                    var outputStream = bluetoothSocket.getOutputStream();

                    plus.android.importClass(outputStream);

                    var string = that.send_data_list

                    var bytes = plus.android.invoke(string, 'getBytes', 'gbk');//创建输出流失败

                    outputStream.write(bytes);

//                     outputStream.flush();

//                     device = null //这里关键

//                     bluetoothSocket.close(); //必须关闭蓝牙连接否则意外断开的话打印错误

                }

            },

            open_bluetooth(){

                if(!BAdapter.isEnabled()) {

                    BAdapter.enable();//启动蓝牙

                    uni.showToast({

                        title: '蓝牙已启动',

                        duration:

                    })

                }

            },

            //关闭蓝牙

            close_bluetooth(){

                let that =this

                //关闭蓝牙都把之前的清空

                that.no_match_list=[];

                that.match_list=[]

                if (BAdapter.isEnabled()) {

                    BAdapter.disable();//关闭蓝牙

                    uni.showToast({

                        title: '蓝牙已关闭',

                        duration:

                    })

                }

            },

            //获取已匹配蓝牙设备

            bluetooth_list(){

                let that=this

                //先清空

                that.match_list=[]

                var lists = BAdapter.getBondedDevices();

                plus.android.importClass(lists);

                var iterator = lists.iterator();

                plus.android.importClass(iterator);

                while (iterator.hasNext()) {

                    var d = iterator.next();

                    plus.android.importClass(d);

                    let arr={

                        "name": d.getName(),

                        "SN": d.getAddress()

                    }

                    that.match_list.push(arr)

                }

            },

            //搜索没匹配的蓝牙设备

            search_bluetooth(address){

                let that=this

                //判断蓝牙是否开启

                if (!BAdapter.isEnabled()) {

                    uni.showToast({

                        title: '请先打开蓝牙',

                        duration:

                    });

                    return

                }

                if(address.length!=undefined){

                    uni.showModal({

                        title: '提示',

                        content: '是否配对此蓝牙？',

                        success: function (res) {

                            if (res.confirm) {

                                console.log('用户点击确定');

                                uni.showLoading({

                                    title: '蓝牙匹配中...'

                                });

                                that.search_pipei(address)

                            }

                        }

                    });

                }else{

                    uni.showLoading({

                        title: '蓝牙搜索中...'

                    });

                    that.search_pipei()

                }

            },

            //搜索和匹配蓝牙

            search_pipei(address){

                let that=this

                //获取已匹配的蓝牙

                that.bluetooth_list()

                //每次搜索都把之前的清空

                that.bArray=[];

                that.no_match_list=[];

                var filter = new IntentFilter();

                var BDevice = new BluetoothDevice();

                BAdapter.startDiscovery(); //开启搜索

                var receiver = plus.android.implements('io.dcloud.android.content.BroadcastReceiver', {

                    onReceive: function(context, intent) { //回调

                        try {

                            plus.android.importClass(intent); //通过intent实例引入intent类

                            if(intent.getAction() == "android.bluetooth.adapter.action.DISCOVERY_FINISHED") {

                                uni.hideLoading()

                                main.unregisterReceiver(receiver); //取消监听

                            } else {

                                //从Intent中获取设备对象

                                BDevice= intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);

                                //配对蓝牙

                                if (address == BDevice.getAddress()) {

                                    if (BDevice.createBond()) { //配对命令.createBond()

                                        console.log("配对成功");

                                        uni.hideLoading()

                                    }

                                }

                                if(BDevice == null) {

                                    main.unregisterReceiver(receiver); //取消监听

                                    uni.hideLoading()

                                    //获取已匹配的蓝牙

                                    that.bluetooth_list()

                                    return;

                                }

                                var name=BDevice.getAddress()+BDevice.getName();

                                if(that.bArray.indexOf(name) == -){     //去重

                                    that.bArray.push(name);//用于去重的

                                    let arr={

                                        "name": BDevice.getName(),

                                        "SN": BDevice.getAddress()

                                    }

                                    that.no_match_list.push(arr)

                                    console.log(JSON.stringify(that.no_match_list))

                                }

                            }

                        } catch(e) {

                            console.error(e);

                        }

                    }

                });

                filter.addAction(BDevice.ACTION_FOUND);

                filter.addAction(BAdapter.ACTION_DISCOVERY_STARTED);

                filter.addAction(BAdapter.ACTION_DISCOVERY_FINISHED);

                filter.addAction(BAdapter.ACTION_STATE_CHANGED);

                main.registerReceiver(receiver, filter); //注册监听

            },

        }

    }

</script>

<style scoped="scoped" lang="scss">

@import "./Bluetooth.scss";

</style>

.bluetooth{

    padding: 20upx 20upx 120upx;

    .h1{

        padding: 20upx ;color: #1482D1;border-top: 1upx solid #EFEFF4;

    }

    .btn{

        display:flex;position:fixed;bottom:0upx;padding:20upx 10upx;justify-content:space-around;width: %;color:#fff;border-top:1px solid #f2f2f2;background-color: #fff;

        view{

            width: 200upx;height: 80upx;line-height:80upx;text-align: center;border-radius:10upx;

        }

        .btn_1{

            background-color: #009BDE;

        }

        .btn_2{

            background-color: red;

        }

        .btn_3{

            background-color: #3CB371;

        }

    }

    .uni-textarea{

        textarea{

            border: 1px solid #EFEFF4;border-radius: 10px;width: %;padding: 10upx;box-sizing: border-box;

        }

        .fasong{

            width: %;padding:15upx 10upx;box-sizing: border-box;border-radius: 10px;background: #1482D1;text-align: center;color: white;margin: 10px ;

        }

    }

}