蓝牙连接失败：读取失败，套接字可能关闭或超时，读取ret：-1

Question

我正在尝试创建一个蓝牙连接。

我可以搜索附近的设备，但是，当我尝试连接我得到一个错误，我不明白：

logcat的

01-03 00:55:06.909 6654-6654/com.bluetooth.prova3.listdiscovery D/CONNECTTHREAD: Could not close connection:java.io.IOException: read failed, socket might closed or timeout, read ret: -1 

我有两个类连接，一个接收设备和执行连接，另一个用于连接。

ConexionActivity.Java

package com.bluetooth.prova3.listdiscovery; 

***Imports***** 

public class ConexionActivity extends AppCompatActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_conexion); 

     //Aqui rebo el dispositiu que he seleccionat per conectarme 
     Intent intent = getIntent(); 
     BluetoothDevice bluetoothDevice = intent.getExtras().getParcelable("btdevice"); 
     //mostro el nom per la pantalla amb un text view 
     TextView MacAddress = (TextView)findViewById(R.id.MAC); 
     String aaaa = bluetoothDevice.getName() + "\n" + bluetoothDevice.getAddress(); 
     MacAddress.setText(aaaa); 

     ConnectThread conexion = new ConnectThread(bluetoothDevice); 
     conexion.run(); 
    } 
} 

ConnectThread.java

package com.bluetooth.prova3.listdiscovery; 

进口

public class ConnectThread extends Thread{ 
    private final BluetoothSocket mmSocket; 
    private final BluetoothDevice mmDevice; 
    UUID UUIDaleatorio = UUID.randomUUID(); 
    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(UUIDaleatorio); 
     } catch (IOException e) { 

      Log.d("CONNECTTHREAD", "Could not close connection:" + e.toString()); 
     } 
     mmSocket = tmp; 
    } 

    public void run() { 
     // Cancel discovery because it will slow down the connection 
     //mBluetoothAdapter.cancelDiscovery(); 
     try { 
      // Connect the device through the socket. This will block 
      // until it succeeds or throws an exception 
      mmSocket.connect(); 
     } catch (IOException connectException) { 
      Log.d("CONNECTTHREAD", "Could not close connection:" + connectException.toString()); 
      // Unable to connect; close the socket and get out 
      try { 
       mmSocket.close(); 
      } catch (IOException closeException) { Log.d("CONNECTTHREAD", "Could not close connection:" + closeException.toString());} 
      return; 
     } 

     // Do work to manage the connection (in a separate thread) 
     // manageConnectedSocket(mmSocket); 
    } 

    /** Will cancel an in-progress connection, and close the socket */ 
    public void cancel() { 
     try { 
      mmSocket.close(); 
     } catch (IOException e) { } 
    } 
} 

谢谢！

Answer 1

尝试使用，

createInsecureRfcommSocketToServiceRecord(MY_UUID)

代替

createRfcommSocketToServiceRecord(MY_UUID)

这应该可以解决这个问题。分享您的调试结果，如果这不能解决问题。

此外，不要生成随机UUID（s），请尝试下面的一个。

UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");