16

在我的项目中，我必须使用条形码扫描仪 Symbol CS3070 通过蓝牙读取条形码。IE; 我必须通过蓝牙在 android 设备和条形码扫描仪之间建立连接。谁能告诉我如何从条形码阅读器读取值以及如何设置通信？我已经阅读了蓝牙开发人员指南，并且我不想在蓝牙键盘仿真 (HID) 模式下使用条形码阅读器（我有一些可以使用软键盘和条形码阅读器填充的文本视图，但我无法控制焦点）

我会使用这样的线程与读者交流

    private class BarcodeReaderThread extends Thread {
    private final BluetoothServerSocket mmServerSocket;

    public BarcodeReaderThread(UUID UUID_BLUETOOTH) {
        // Use a temporary object that is later assigned to mmServerSocket,
        // because mmServerSocket is final
        BluetoothServerSocket tmp = null;
        try {
            // MY_UUID is the app's UUID string, also used by the client code
            tmp = mBluetoothAdapter.listenUsingRfcommWithServiceRecord("BarcodeScannerForSGST", UUID_BLUETOOTH);
            /*
             * The UUID is also included in the SDP entry and will be the basis for the connection
             * agreement with the client device. That is, when the client attempts to connect with this device,
             * it will carry a UUID that uniquely identifies the service with which it wants to connect.
             * These UUIDs must match in order for the connection to be accepted (in the next step)
             */
        } catch (IOException e) { }
        mmServerSocket = tmp;
    }

    public void run() {
        BluetoothSocket socket = null;
        // Keep listening until exception occurs or a socket is returned
        while (true) {
            try {
                socket = mmServerSocket.accept();
                try {
                    // If a connection was accepted
                    if (socket != null) {
                        // Do work to manage the connection (in a separate thread)
                        InputStream mmInStream = null;

                        // Get the input and output streams, using temp objects because
                        // member streams are final
                        mmInStream = socket.getInputStream();

                        byte[] buffer = new byte[1024];  // buffer store for the stream
                        int bytes; // bytes returned from read()

                        // Keep listening to the InputStream until an exception occurs
                        // Read from the InputStream
                        bytes = mmInStream.read(buffer);
                        if (bytes > 0) {
                            // Send the obtained bytes to the UI activity
                            String readMessage = new String(buffer, 0, bytes);
                            //doMainUIOp(BARCODE_READ, readMessage);
                            if (readMessage.length() > 0 && !etMlfb.isEnabled()) //Se sono nella parte di picking
                                new ServerWorker().execute(new Object[] {LEGGI_SPED, readMessage});
                        }
                        socket.close();
                    }
                }
                catch (Exception ex) { } 
            } catch (IOException e) {
                break;
            }
        }
    }

    /** 
     * Will cancel the listening socket, and cause the thread to finish
     */
    public void cancel() {
        try {
            mmServerSocket.close();
        } catch (IOException e) { }
    }
}

谢谢

4

1 回答 1

16

我刚收到我的设备，当我配对并连接设备时，它会自动将数据发送到当前聚焦的 EditText。您使用的是什么版本的 Android，因为我在 ICS 和 JB 上尝试过它，它以这种方式工作。我没有在任何早期版本中测试过它。

编辑：

我将手机降级为 Gingerbread，发现它的工作方式不同，但我有一个解决方案：

这个很重要！>> 首先，您必须扫描手册中写有“Serial Port Profile (SPP)”的条形码。 

btAdapter = BluetoothAdapter.getDefaultAdapter();
if (btAdapter.isEnabled())
{
    new BluetoothConnect().execute("");
}

public class BluetoothConnect extends AsyncTask<String, String, Void>
{
    public static String MY_UUID = "00001101-0000-1000-8000-00805F9B34FB";

    @Override
    protected Void doInBackground(String... params)
    {
        String address = DB.GetOption("bluetoothAddress");
        BluetoothDevice device = btAdapter.getRemoteDevice(address);
        try
        {
            socket = device.createRfcommSocketToServiceRecord(UUID.fromString(MY_UUID));
            btAdapter.cancelDiscovery();
            socket.connect();
            InputStream stream = socket.getInputStream();
            int read = 0;
            byte[] buffer = new byte[128];
            do
            {
                try
                {
                    read = stream.read(buffer);
                    String data = new String(buffer, 0, read);
                    publishProgress(data);
                }
                catch(Exception ex)
                {
                    read = -1;
                }
            }
            while (read > 0);
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onProgressUpdate(String... values)
    {
        if (values[0].equals("\r"))
        {
            addToList(input.getText().toString());
            pickupInput.setText("");
        }
        else input.setText(values[0]);
        super.onProgressUpdate(values);
    }
}

这是我的工作代码的不完整版本，但您应该了解要点。
我希望这个解决方案也适用于你！

于 2012-09-18T18:52:25.770 回答