安卓Native.js蓝牙连接票据打印机完整代码已测试修改

测试机：佳博PT-280便携打印机
手机：华为低端
功能：扫描周围蓝牙设备加入列表，点击未配对设备，自动配对设备，点击已配对设备，进行打印测试
先上html

<!DOCTYPE html>  
<html>  

    <head>  
        <meta charset="UTF-8">  

        <title></title>  

        <script src="js/pr.js"></script>  
    </head>  

    <body>  

        <p><input id="bt1" type="button" value="搜索设备" onclick="searchDevices('a')"></p>  

               </button>  

        </div>  

        <div>  
            未配对蓝牙设备  
            <ul id="list1">  

            </ul>  
        </div>  

        <div>  
            已配对蓝牙设备  

            <ul id="list2">  

            </ul>  
        </div>  

    </body>  

</html>

下面是js文件

//address=""搜索蓝牙//address=设备mac地址，自动配对给出mac地址的设备  
function searchDevices(address) {  
    //注册类  
    var main = plus.android.runtimeMainActivity();  
    var IntentFilter = plus.android.importClass('android.content.IntentFilter');  
    var BluetoothAdapter = plus.android.importClass("android.bluetooth.BluetoothAdapter");  
    var BluetoothDevice = plus.android.importClass("android.bluetooth.BluetoothDevice");  
    var BAdapter = BluetoothAdapter.getDefaultAdapter();  
    console.log("开始搜索设备");  
    var filter = new IntentFilter();  
    var bdevice = new BluetoothDevice();  
    var on = null;  
    var un = null;  
    var vlist1 = document.getElementById('list1'); //注册容器用来显示未配对设备  
    vlist1.innerHTML = ''; //清空容器  
    var vlist2 = document.getElementById('list2'); //注册容器用来显示未配对设备  
    vlist2.innerHTML = ''; //清空容器  
    var button1 = document.getElementById('bt1');  
    button1.disabled=true;  
    button1.value='正在搜索请稍候';  
    BAdapter.startDiscovery(); //开启搜索  
    var receiver;  
    receiver = plus.android.implements('io.dcloud.android.content.BroadcastReceiver', {  
        onReceive: function(context, intent) { //实现onReceiver回调函数  
            plus.android.importClass(intent); //通过intent实例引入intent类，方便以后的‘.’操作  
            console.log(intent.getAction()); //获取action  
            if(intent.getAction() == "android.bluetooth.adapter.action.DISCOVERY_FINISHED"){  
                main.unregisterReceiver(receiver);//取消监听  
                button1.disabled=false;  
                button1.value='搜索设备';  
                console.log("搜索结束")  
            }else{  
            BleDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);  
            //判断是否配对  
            if (BleDevice.getBondState() == bdevice.BOND_NONE) {  
                console.log("未配对蓝牙设备：" + BleDevice.getName() + '    ' + BleDevice.getAddress());  
                //参数如果跟取得的mac地址一样就配对  
                if (address == BleDevice.getAddress()) {  
                    if (BleDevice.createBond()) { //配对命令.createBond()  
                        console.log("配对成功");  
                        var li2 = document.createElement('li'); //注册  
                        li2.setAttribute('id', BleDevice.getAddress()); //打印机mac地址  
                        li2.setAttribute('onclick', 'print(id)'); //注册click点击列表进行打印  
                        li2.innerText = BleDevice.getName();  
                        vlist2.appendChild(li2);  
                    }  

                } else {  
                    if(BleDevice.getName() != on ){ //判断防止重复添加  
                    var li1 = document.createElement('li'); //注册  
                    li1.setAttribute('id', BleDevice.getAddress()); //打印机mac地址  
                    li1.setAttribute('onclick', 'searchDevices(id)'); //注册click点击列表进行配对  
                    on = BleDevice.getName();  
                    li1.innerText = on;  
                    vlist1.appendChild(li1);  

                    }  

                }  
            } else {  
                if(BleDevice.getName() != un ){ //判断防止重复添加  
                console.log("已配对蓝牙设备：" + BleDevice.getName() + '    ' + BleDevice.getAddress());  
                var li2 = document.createElement('li'); //注册  
                li2.setAttribute('id', BleDevice.getAddress()); //打印机mac地址  
                li2.setAttribute('onclick', 'print(id)'); //注册click点击列表进行打印  
                un = BleDevice.getName();                 
                li2.innerText = un;  
                vlist2.appendChild(li2);}  
            }}  

        }  
    });  

    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  
}  

var device = null,  
    BAdapter = null,  
    BluetoothAdapter = null,  
    uuid = null,  
    main = null,  
    bluetoothSocket = null;  

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);  
        var string = "打印测试\r\n";  
        var bytes = plus.android.invoke(string, 'getBytes', 'gbk');  
        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  

    }  

}

2***@qq.com

Uncaught java.io.IOException: read failed, socket might closed or timeout, read ret: -1;at android.bluetooth.BluetoothSocket.connect at index.html:1 你们都没遇到这个问题吗？

2022-07-20 17:50

1***@qq.com

回复 4***@qq.com ：

解决此问题了吗

2022-05-07 15:27