与蓝牙打印机建立连接并打印

mui.plusReady(function(){     
    var main = plus.android.runtimeMainActivity();  
    var BluetoothAdapter = plus.android.importClass("android.bluetooth.BluetoothAdapter");  
    var UUID=plus.android.importClass("java.util.UUID");  
    uuid=UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");  
    var BAdapter = BluetoothAdapter.getDefaultAdapter();  
    BAdapter.cancelDiscovery();//停止扫描  
    var addres_mac = plus.storage.getItem("printer");//传入打印机mac地址  
    device=BAdapter.getRemoteDevice(addres_mac);  
    plus.android.importClass(device);  
});  

function print(){  
    bluetoothSocket = device.createInsecureRfcommSocketToServiceRecord(uuid);  
    plus.android.importClass(bluetoothSocket);   
    if(!bluetoothSocket.isConnected()){  
        bluetoothSocket.connect();  
    }  
    var outputStream=bluetoothSocket.getOutputStream();  
    plus.android.importClass(outputStream);  
    var string="你好123";  
    var bytes = plus.android.invoke(string,'getBytes','gbk');  
    //console.log(bytes+"."+bytes.length);   
    outputStream.write(bytes);  
    outputStream.flush();  
}