activar - bluetooth android studio

Compruebe que el SPP UUID 00001101-0000-1000-8000-00805F9B34FB existe en el servidor

Question

Estoy usando Windows 7 PC como servidor. Código:

public class PCSPPServer {
//start server
private void startServer() throws IOException{
//Create a UUID for SPP
UUID uuid = new UUID("1101", true);
//Create the servicve url
String connectionString = "btspp://localhost:" + uuid +";name=Sample SPP Server";
//open server url
StreamConnectionNotifier streamConnNotifier = (StreamConnectionNotifier)Connector.open( connectionString );
//Wait for client connection
System.out.println("/nServer Started. Waiting for clients to connect...");
StreamConnection connection=streamConnNotifier.acceptAndOpen();
RemoteDevice dev = RemoteDevice.getRemoteDevice(connection);
System.out.println("Remote device address: "+dev.getBluetoothAddress());
System.out.println("Remote device name: "+dev.getFriendlyName(true));
//read string from spp client
InputStream inStream=connection.openInputStream();
BufferedReader bReader=new BufferedReader(new InputStreamReader(inStream));
String lineRead=bReader.readLine();
System.out.println(lineRead);
//send response to spp client
OutputStream outStream=connection.openOutputStream();
PrintWriter pWriter=new PrintWriter(new OutputStreamWriter(outStream));
pWriter.write("Response String from SPP Server/r/n");
pWriter.flush();
pWriter.close();
streamConnNotifier.close();
}
public static void main(String[] args) throws IOException {
//display local device address and name
LocalDevice localDevice = LocalDevice.getLocalDevice();
System.out.println("Address: "+localDevice.getBluetoothAddress());
System.out.println("Name: "+localDevice.getFriendlyName());
PCSPPServer sampleSPPServer=new PCSPPServer();
sampleSPPServer.startServer();
}
}

Y HTC Desire como cliente. Código:

public class MainActivity extends Activity {
TextView out;
private static final int REQUEST_ENABLE_BT = 1;
private BluetoothAdapter btAdapter = null;
private BluetoothSocket btSocket = null;
private OutputStream outStream = null;
// Well known SPP UUID
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
// Insert your server''s MAC address
private static String address = "00:15:83:0C:BF:EB";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
out = (TextView) findViewById(R.id.out);
out.append("/n...In onCreate()...");
btAdapter = BluetoothAdapter.getDefaultAdapter();
CheckBTState();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@Override
public void onStart() {
super.onStart();
out.append("/n...In onStart()...");
}
@Override
public void onResume() {
super.onResume();
out.append("/n...In onResume.../n...Attempting client connect...");
// Set up a pointer to the remote node using it''s address.
BluetoothDevice device = btAdapter.getRemoteDevice(address);
// Two things are needed to make a connection:
// A MAC address, which we got above.
// A Service ID or UUID. In this case we are using the
// UUID for SPP.
try {
btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) {
AlertBox("Fatal Error", "In onResume() and socket create failed: " + e.getMessage() + ".");
}
// Discovery is resource intensive. Make sure it isn''t going on
// when you attempt to connect and pass your message.
btAdapter.cancelDiscovery();
// Establish the connection. This will block until it connects.
try {
btSocket.connect();
out.append("/n...Connection established and data link opened...");
} catch (IOException e) {
try {
btSocket.close();
} catch (IOException e2) {
AlertBox("Fatal Error", "In onResume() and unable to close socket during connection failure" + e2.getMessage() + ".");
}
}
// Create a data stream so we can talk to server.
out.append("/n...Sending message to server...");
try {
outStream = btSocket.getOutputStream();
} catch (IOException e) {
AlertBox("Fatal Error", "In onResume() and output stream creation failed:" + e.getMessage() + ".");
}
String message = "Hello from Android./n";
byte[] msgBuffer = message.getBytes();
try {
outStream.write(msgBuffer);
} catch (IOException e) {
String msg = "In onResume() and an exception occurred during write: " + e.getMessage();
if (address.equals("00:00:00:00:00:00"))
msg = msg + "./n/nUpdate your server address from 00:00:00:00:00:00 to the correct address on line 37 in the java code";
msg = msg + "./n/nCheck that the SPP UUID: " + MY_UUID.toString() + " exists on server./n/n";
AlertBox("Fatal Error", msg);
}
}
@Override
public void onPause() {
super.onPause();
out.append("/n...In onPause()...");
if (outStream != null) {
try {
outStream.flush();
} catch (IOException e) {
AlertBox("Fatal Error", "In onPause() and failed to flush output stream: " + e.getMessage() + ".");
}
}
try {
btSocket.close();
} catch (IOException e2) {
AlertBox("Fatal Error", "In onPause() and failed to close socket." + e2.getMessage() + ".");
}
}
@Override
public void onStop() {
super.onStop();
out.append("/n...In onStop()...");
}
@Override
public void onDestroy() {
super.onDestroy();
out.append("/n...In onDestroy()...");
}
private void CheckBTState() {
// Check for Bluetooth support and then check to make sure it is turned on
// Emulator doesn''t support Bluetooth and will return null
if(btAdapter==null) {
AlertBox("Fatal Error", "Bluetooth Not supported. Aborting.");
} else {
if (btAdapter.isEnabled()) {
out.append("/n...Bluetooth is enabled...");
} else {
//Prompt user to turn on Bluetooth
Intent enableBtIntent = new Intent(btAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}
}
}
public void AlertBox( String title, String message ){
new AlertDialog.Builder(this)
.setTitle( title )
.setMessage( message + " Press OK to exit." )
.setPositiveButton("OK", new OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
finish();
}
}).show();
}
}

He intentado con Windows 7 de 32 bits y 64 bits . Estoy usando HTC Desire Android v2.3.3 .

Cuando intento conectar el cliente al servidor y trato de escribir cualquier texto usando OutputStream , obtengo el error:

Compruebe que el SPP UUID 00001101-0000-1000-8000-00805F9B34FB existe en el servidor

También agrego un nuevo dispositivo Bluetooth en mi PC.

Información del dispositivo Bluetooth:

Fabricante: Cambridge Silicon Radio Ltd Proveedor de pillería: Microsoft

Ver información en esta imagen:

¡Avíseme si alguien tiene una idea!

Answer 1

use DataOutputStream para escribir. Prueba esto :

DataOutputStream dos;
try {
//outStream = btSocket.getOutputStream();
dos = new DataOutputStream(btSocket.getOutputStream());
} catch (IOException e) {
AlertBox("Fatal Error", "In onResume() and output stream creation failed:" + e.getMessage() + ".");
}
//String message = "Hello from Android./n";
//byte[] msgBuffer = message.getBytes();
try {
//outStream.write(msgBuffer);
dos.writeChar(''H'');
dos.writeChar(''i'');
} catch (IOException e) {
String msg = "In onResume() and an exception occurred during write: " + e.getMessage();
if (address.equals("00:00:00:00:00:00"))
msg = msg + "./n/nUpdate your server address from 00:00:00:00:00:00 to the correct address on line 37 in the java code";
msg = msg + "./n/nCheck that the SPP UUID: " + MY_UUID.toString() + " exists on server./n/n";
AlertBox("Fatal Error", msg);
}