过去2天试图解决这个问题。我在这个论坛上看到了很多关于这个主题的解决方案，并尝试了大多数解决方案，如This和This，但是没有运气。因为这个原因我问一个关于这个话题的新问题。所以有人可以指导我如何解决这个问题？特别是我认为我不能使用正确的UUID（虽然我使用的标准UUID 00001101-0000-1000-8000-00805F9B34FB ）用于连接我的服务器PC （用java编写）和客户端Android 。
服务器代码（Java）：
public class Main {
private final LocalDevice mLocalDevice;
public static void main(String[] args) throws IOException, InterruptedException
{
new Main().start();
}
public Main() throws IOException
{
mLocalDevice = LocalDevice.getLocalDevice();
mLocalDevice.setDiscoverable(DiscoveryAgent.GIAC);
}
public void start() throws IOException
{
StreamConnectionNotifier connectionNotifier =(StreamConnectionNotifier) Connector.open("btspp://localhost:" +
"0000110100001000800000805F9B34FB;name=BtExample;" +
"authenticate=false;encrypt=false;master=false");
System.out.println("accepting on " + mLocalDevice.getBluetoothAddress());
StreamConnection streamConnection = connectionNotifier.acceptAndOpen();
DataInputStream is = streamConnection.openDataInputStream();
byte[] bytes = new byte[1024];
int r;
while ((r = is.read(bytes)) > 0)
{
System.out.println(new String(bytes, 0, r));
}
streamConnection.close();
}
}
客户端代码（Android）：
try {
mBtAdapter = BluetoothAdapter.getDefaultAdapter();
Log.d("BT", "getting local device");
// remote MAC here:
BluetoothDevice device =mBtAdapter.getRemoteDevice("My_Computer_bluetooth_Address");
Log.d("BT", "remote device: "+ device.getName().toString());
Log.d("BT", "connecting to service");
//Process process = Runtime.getRuntime().exec("su -c 'sdptool records " + device.getAddress() + "'");
//Log.d("BT", process.toString());
//Method m = device.getClass().getMethod("createRfcommSocket", new Class[] {int.class});
//socket = (BluetoothSocket) m.invoke(device, 1);//I also tried this,but same exception occurs
//sock=socket;
BluetoothSocket socket = device.createInsecureRfcommSocketToServiceRecord(
UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"));
Log.d("BT", "about to connect");
mBtAdapter.cancelDiscovery();
socket.connect();
Log.d("BT", "Connected!");
socket.getOutputStream().write("Hello, world!".getBytes());
} catch (Exception e) {
Log.e("BT", "Error connecting to device", e);
}
Logcat异常视图：
02-15 14:12:02.022: D/BT(4798): getting local device
02-15 14:12:02.023: D/BT(4798): remote device: SHUVRO-PC //my PC name
02-15 14:12:02.023: D/BT(4798): connecting to service
02-15 14:12:02.024: I/BluetoothSocket_MTK(4798): [JSR82] Bluetooth Socket Constructor
02-15 14:12:02.024: I/BluetoothSocket_MTK(4798): [JSR82] type=1 fd=-1 auth=false encrypt=false port=-1
02-15 14:12:02.026: D/BT(4798): about to connect
02-15 14:12:02.055: I/BluetoothSocket_MTK(4798): [JSR82] connect: do SDP
02-15 14:12:08.057: I/BluetoothSocket_MTK(4798): [JSR82] SdpHelper::onRfcommChannelFound: channel=-1
02-15 14:12:08.059: E/BT(4798): Error connecting to device
02-15 14:12:08.059: E/BT(4798): java.io.IOException: Service discovery failed
02-15 14:12:08.059: E/BT(4798): at android.bluetooth.BluetoothSocket$SdpHelper.doSdp(BluetoothSocket.java:813)
02-15 14:12:08.059: E/BT(4798): at android.bluetooth.BluetoothSocket.connect(BluetoothSocket.java:382)
02-15 14:12:08.059: E/BT(4798): at com.bluetoothTest.BluetoothTestActivity.onClick(BluetoothTestActivity.java:82)
02-15 14:12:08.059: E/BT(4798): at android.view.View.performClick(View.java:3517)
02-15 14:12:08.059: E/BT(4798): at android.view.View$PerformClick.run(View.java:14155)
02-15 14:12:08.059: E/BT(4798): at android.os.Handler.handleCallback(Handler.java:605)
02-15 14:12:08.059: E/BT(4798): at android.os.Handler.dispatchMessage(Handler.java:92)
02-15 14:12:08.059: E/BT(4798): at android.os.Looper.loop(Looper.java:137)
02-15 14:12:08.059: E/BT(4798): at android.app.ActivityThread.main(ActivityThread.java:4508)
02-15 14:12:08.059: E/BT(4798): at java.lang.reflect.Method.invokeNative(Native Method)
02-15 14:12:08.059: E/BT(4798): at java.lang.reflect.Method.invoke(Method.java:511)
02-15 14:12:08.059: E/BT(4798): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:809)
02-15 14:12:08.059: E/BT(4798): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:576)
02-15 14:12:08.059: E/BT(4798): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：0)
这是我在客户端使用的最终代码，用于建立（安全或不安全）连接。在我的用例中：非平凡的pinCode意味着目标设备需要安全连接，否则目标设备接受不安全的连接。
我认为此代码需要API级别15 +
private BluetoothAdapter mBluetoothAdapter;
public final String BT_UUID = "00001101-0000-1000-8000-00805F9B34FB";
private BluetoothDevice bluetoothDevice;
private BluetoothSocket socket;
...
public void establishBluetoothConnection(String pinCode) throws IOException {
//needed because "bluetooth device discovery" may initiated by any other
// process and there are good chances that the socket.connect() fail when bluetooth discovery process is running.
mBluetoothAdapter.cancelDiscovery();
if ("".equals(pinCode) || pinCode == null || "0000".equals(pinCode)) {
socket = bluetoothDevice.createInsecureRfcommSocketToServiceRecord(UUID.fromString(BT_UUID));
} else {
setPin(pinCode);
socket = bluetoothDevice.createRfcommSocketToServiceRecord(UUID.fromString(BT_UUID));
}
socket.connect(); //blocking up to timeout of about 12 sec. throws IOException in case of failure
}
/**
* hack to set the pin code programatically. The android API don't have a public method to set the pin code.
* that's why we use this hack. In case of failure: android will prompt the user to enter the pin code manually.
*/
private void setPin(String pinCode) {
try {
byte[] ar = pinCode.getBytes();
Method m2 = bluetoothDevice.getClass().getMethod("setPin", new Class[]{byte[].class});
m2.invoke(bluetoothDevice, ar);
} catch (NoSuchMethodException e) {
Log.e("Bluetooth", "Failed to set pin code", e);
} catch (InvocationTargetException e) {
Log.e("Bluetooth", "Failed to set pin code", e);
} catch (IllegalAccessException e) {
Log.e("Bluetooth", "Failed to set pin code", e);
}
}