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我目前正在尝试创建一个将Google Glass（客户端）连接到我的电脑（python服务器）的应用程序。我想发送简单的字符串。我尝试了多种方式，但没有多少运气。我目前正在使用我找到的一些示例代码。同时运行后，我得到的消息Android蓝牙客户端和服务器不会连接
“在的onResume（）和写入过程中发生了异常：套接字关闭”
玻璃上，和我的电脑（惠普Pavilion DV6运行Ubuntu 12.04与蓝牙加密狗）完全冻结。有一次，GUI本身崩溃，我正在控制台上查看堆栈跟踪（可怕的黑屏）。
下面是客户端代码：
import java.io.IOException;
import java.io.OutputStream;
import java.util.UUID;
import com.myPackage.glassbluetooth.R;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
public class ConnectTest 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 = "00:1F:81:00:08:30";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
out = (TextView) findViewById(R.id.out);
out.append("\n...In onCreate()...");
btAdapter = BluetoothAdapter.getDefaultAdapter();
CheckBTState();
}
@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.
Log.d("CONNECTTEST", "Try to open socket");
try {
btSocket.connect();
Log.d("CONNECTTEST", "btSocket.connect executed");
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();
}
}
这里是服务器代码：
from bluetooth import *
server_sock=BluetoothSocket(RFCOMM)
server_sock.bind(("",PORT_ANY))
server_sock.listen(1)
port = server_sock.getsockname()[1]
uuid = "1aefbf9b-ea60-47de-b5a0-ed0e3a36d9a5"
testUuid = "00001101-0000-1000-8000-00805F9B34FB"
advertise_service(server_sock, "GlassServer",
service_id = testUuid,
service_classes = [ uuid, SERIAL_PORT_CLASS ],
profiles = [ SERIAL_PORT_PROFILE ],
# protocols = [ OBEX_UUID ]
)
print("Waiting for connection on RFCOMM channel %d" % port)
client_sock, client_info = server_sock.accept()
print("Accepted connection from ", client_info)
try:
while True:
data = client_sock.recv(1024)
if len(data) == 0: break
print("received [%s]" % data)
except IOError:
pass
print("disconnected")
client_sock.close()
server_sock.close()
print("all done")
这里是hcitool的输出：
$ hcitool scan
Scanning ...
F4:B7:E2:F9:74:63 GLASS-YUKON
$ hcitool dev
Devices:
hci0 00:1F:81:00:08:30
没有人有任何想法这是怎么回事？另外，如果你知道任何相关的示例程序可能工作，我会有兴趣尝试它们！提前致谢！
凹凸，任何人都可以帮忙吗？
经过对内置蓝牙功能的计算机进行实验后，我能够更深入地研究这个问题。代码尝试创建RFComm套接字时发生此问题。使用我现在的代码，我得到一个异常服务发现失败。我在使用这里发现的建议后摆脱了那个错误：Service discovery failed exception using Bluetooth on Android
但现在我得到一个异常，说“主机已关闭”。没有发现我找到的修复工作。有任何想法吗？