您好我必须开发一个应用程序,所以我有一个设备(服务器)有3个客户端。 我做了所有验证,打开蓝牙,找到设备,所有工作都很棒。但是,当我要连接设备时,我不知道会发生什么。
当我点击要连接的设备时,我正在使用下一个代码。我只在母设备上安装了我的应用程序。
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// TODO Auto-generated method stub
try {
if(btADapter.isDiscovering()){
btADapter.cancelDiscovery();
}
if(listAdapter.getItem(position).contains("Paired")){
BluetoothDevice selectedDevice = devices.get(position);
ConnectThread connect = new ConnectThread(selectedDevice);
connect.start();
}
else{
BluetoothDevice selectedDevice = devices.get(position);
ConnectThread connect = new ConnectThread(selectedDevice);
connect.start();
//pairDevice(devices.get(position));
//Toast.makeText(getApplicationContext(), "device is not paired", Toast.LENGTH_LONG).show();
}
} catch (Exception e) {
System.out.println(e);
}
}
我在这里有一个问题,如果没有配对会发生什么?如果我尝试连接它自动配对它们?
我的UUID是:&#34; 00001101-0000-1000-8000-00805F9B34FB&#34; 然后我的连接代码:
private class ConnectThread extends Thread {
private final BluetoothSocket mmSocket;
private final BluetoothDevice mmDevice;
public ConnectThread(BluetoothDevice device) {
// Use a temporary object that is later assigned to mmSocket,
// because mmSocket is final
BluetoothSocket tmp = null;
mmDevice = device;
// Get a BluetoothSocket to connect with the given BluetoothDevice
try {
// MY_UUID is the app's UUID string, also used by the server
// code
tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) {
}
mmSocket = tmp;
}
public void run() {
// Cancel discovery because it will slow down the connection
btADapter.cancelDiscovery();
try {
// Connect the device through the socket. This will block
// until it succeeds or throws an exception
mmSocket.connect();
} catch (IOException connectException) {
System.out.println(connectException);
// Unable to connect; close the socket and get out
try {
mmSocket.close();
} catch (IOException closeException) {
}
return;
}
// Do work to manage the connection (in a separate thread)
mHandler.obtainMessage(SUCCESS_CONNECT, mmSocket).sendToTarget();
}
/** Will cancel an in-progress connection, and close the socket */
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) {
}
}
}
当我做mmSocket.connect();应用程序崩溃并返回:java.io.IOException:服务发现失败,我不知道该怎么做。
我需要帮助。 感谢。
修改
在寻找更多答案之后,我在这个问题(Android Bluetooth Connection - Service Discovery Failed)中找到了Sandeep Maram的答案并完美地连接起来。 这是代码:
BluetoothSocket socket = device.createInsecureRfcommSocketToServiceRecord(MY_UUID);
Method m = device.getClass().getMethod("createInsecureRfcommSocket", new Class[] {int.class});
socket = (BluetoothSocket) m.invoke(device, 1);
bluetoothAdapter.cancelDiscovery();
socket.connect();
答案 0 :(得分:0)
当您尝试连接时,它会向您尝试连接的设备发送特定的整数代码,它必须接受传入连接并允许您(母设备)在它们之间共享文件,一旦您的设备是配对它将不再要求你再次配对它,当你选择与之前配对的特定设备时,它将启动连接,你可以随时共享数据,我建议你使用Synchornise,因为你正在做多线程,以便只有一个线程能够读写时间,你的设备中没有死锁或饥饿!
答案 1 :(得分:0)
致电
btADapter.cancelDiscovery();
停止发现可能需要一些时间。您可以尝试在
之间设置延迟btADapter.cancelDiscovery();
和
mmSocket.connect();
如果有帮助,请告诉我。