在我的项目中,我必须使用条形码扫描器Symbol CS3070通过蓝牙阅读条形码.即;我必须通过蓝牙建立
Android设备和条码扫描器之间的连接.任何人都可以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
Bluetooth Developer Guide,我不想在蓝牙键盘仿真(HID)模式下使用条码阅读器(我有一些可以使用软键盘和条形码读取器填充的文本视图,我无法控制焦点)
我会使用这样的线程与读者通信
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,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
解决方法
我刚刚收到我的设备,当我配对并连接设备时,会自动将数据发送到当前关注的EditText.您使用的是什么版本的Android,因为我在ICS和JB上尝试使用它,并且这样做.
我没有在任何早期的版本中测试它.
我没有在任何早期的版本中测试它.
编辑：
我把手机降级到了姜饼,发现它不行,但是我有一个解决方案：
这个很重要！ >>首先,您必须扫描手册中的“串行端口配置文件(SPP)”中的条形码.
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,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);
}
}
