(JavaScript) JS方式调用POS机蓝牙打印

function print(mac_address) {
    if (!mac_address) {
        mui.toast('请选择蓝牙打印机');
        return;
    }

    main = plus.android.runtimeMainActivity();
    BluetoothAdapter = plus.android.importClass("android.bluetooth.BluetoothAdapter");
    UUID = plus.android.importClass("java.util.UUID");
    uuid = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
    BAdapter = BluetoothAdapter.getDefaultAdapter();
    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');
    if (bluetoothSocket.isConnected()) {
        var outputStream = bluetoothSocket.getOutputStream();
        plus.android.importClass(outputStream);

        // outputStream.write([0x1B,0x0E]); // 设置打印字符以正常宽度的2倍打印。
        // outputStream.write([0x1B,0x14]); // 取消字符倍宽打印。

        outputStream.write([0x1B, 0x57, 0x02]); // 设置字符倍宽倍高打印
        outputStream.write([0x1B, 0x61, 0x01]); // 设置字符倍宽倍高打印
        outputStream.write(plus.android.invoke("\n七天在线\n", 'getBytes', 'gbk')); //bytes
        outputStream.write([0x1B, 0x57, 0x01]); // 设置字符倍宽倍高打印

        outputStream.write([0x1B, 0x61, 0x00]); // 选择对齐方式左对齐
        outputStream.write(plus.android.invoke("\n结账单号：123456789\n", 'getBytes', 'gbk')); //bytes
        outputStream.write(plus.android.invoke("\n账单金额：100元\n", 'getBytes', 'gbk')); //bytes
        outputStream.write(plus.android.invoke("\n支付方式：支付宝\n", 'getBytes', 'gbk')); //bytes
        outputStream.write(plus.android.invoke("\n结账时间：2019年6月3日13:52:18\n", 'getBytes', 'gbk')); //bytes
        outputStream.write(plus.android.invoke("\n交易单号：8888888888\n\n\n\n\n\n\n", 'getBytes', 'gbk')); //bytes

        outputStream.write([0x1F, 0x11, 0x00, 0x16, 0x68, 0x74, 0x74, 0x70, 0x73, 0x3a, 0x2f, 0x2f, 0x77, 0x77, 0x77, 0x2e,
            0x62, 0x61, 0x69, 0x64, 0x75, 0x2e, 0x63, 0x6f, 0x6d, 0x2f
        ]); // 打印二维码

        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
    }
}

☞:ESC参考博客