声明

只适用于支持经典蓝牙的安卓，实现 2 安卓机靠近时自动进行蓝牙连接并通信

案例代码

import { BluetoothSerial } from "@ionic-native/bluetooth-serial/ngx";
class P1 {
    disconnect
    constructor(
        private bluetoothSerial: BluetoothSerial
    ) {}
  // 开启蓝牙连接服务
    startConnectService() {
        if (this.connectService) {
            return;
        }
        this.connectService = true;

        this.bluetoothSerial.subscribe('<br>').subscribe((data) => {
            this.areaId = data.split('<br>')[0];
            this.orderArrived(this.areaId);
        });

        this.bluetoothSerial.list().then((devices) => {
            const device = devices[devices.length - 1];
            // setInterval(() => {
            this.bluetoothSerial
                .isConnected()
                .then(() => {
                    this.disconnect = false;
                })
                .catch(() => {
                    device &&
                        this.bluetoothSerial.connect(device.address).subscribe(
                            (a) => {
                                this.disconnect = false;
                                console.log('connect成功', a);
                                // this.bluetoothSerial.write('来自手机的爱<br>').then((a) => {
                                //   console.log('write成功', a)
                                // }, (a) => {
                                //   console.log('write失败', a)
                                // })
                            },
                            (a) => {
                                console.log('connect失败', a);
                                if (a === 'Device connection was lost' || !this.disconnect) {
                                    this.disconnect = true;
                                    this.bluetoothSerial.disconnect().then(() => {
                                        window.bluetoothSerial.connect(device.address);
                                    });
                                }
                            }
                        );
                });
            // }, 5e3)
        });
    }
}

import { BluetoothSerial } from "@ionic-native/bluetooth-serial/ngx";
class P2 {
    disconnect
    constructor(
        private bluetoothSerial: BluetoothSerial
    ) {}
      // 开启蓝牙连接服务
    startConnectService() {
        this.getMaclist();
        this.getMacInterval = setInterval(() => {
            this.getMaclist();
        }, 30 * 60 * 1000);

        this.bluetoothSerial.subscribe('<br>').subscribe(function (data) {
            console.log('收到消息啦！！！！' + JSON.stringify(data));
        });

        setInterval(() => {
            this.macList[0] &&
                this.bluetoothSerial
                    .isConnected()
                    .then(() => {
                        this.disconnect = false;
                    })
                    .catch(() => {
                        // console.log('尝试连接对讲机', this.macList[0].mac);
                        this.bluetoothSerial.connect(this.macList[0].mac).subscribe(
                            (a) => {
                                this.disconnect = false;
                                console.log('connect成功，通知对讲机', a, this.macList[0].mac);
                                this.bluetoothSerial.write(this.areaInfo.areaId + '<br>').then(
                                    (a) => {
                                        console.log('write成功', a);
                                    },
                                    (a) => {
                                        console.log('write失败', a);
                                    }
                                );
                            },
                            (a) => {
                                console.log('connect失败', a, this.macList[0].mac);
                                // if (a === "Device connection was lost" || !this.disconnect) {
                                //   this.disconnect = true;
                                //   this.bluetoothSerial.disconnect();
                                // }
                            }
                        );
                    });
        }, 4e3);
    }
}