java.io.IOException: read failed, socket might closed or timeout, read ret: -1 에러나는데 이유를 잘 모르겠습니다.

Question

안드로이드 스튜디오로 블루투스 스캔후 연결하려고하는데 로그찍어보니 연결실패한이유가저렇게뜨네요 이유가어떤걸까요?..ㅠㅠprivate BluetoothSocket createBluetoothSocket(BluetoothDevice device) throws IOException { if(Build.VERSION.SDK_INT >&#61; 10){ try { final Method m &#61; device.getClass().getMethod(&#34;createInsecureRfcommSocketToServiceRecord&#34;, new Class[] { UUID.class }); return (BluetoothSocket) m.invoke(device,uuid); } catch (Exception e) { Log.e(TAG, &#34;Could not create Insecure RFComm Connection&#34;,e); } } return createBluetoothSocket(device); }블루투스 소캣입니다.public class ConnectedBluetoothThread extends Thread{ private final BluetoothSocket mmSocket; private final InputStream mmInStream; private final OutputStream mmOutStream; public ConnectedBluetoothThread(BluetoothSocket socket) { mmSocket &#61; socket; InputStream tmpIn &#61; null; OutputStream tmpOut &#61; null; // Get the input and output streams, using temp objects because // member streams are final try { tmpIn &#61; socket.getInputStream(); tmpOut &#61; socket.getOutputStream(); } catch (IOException e) { } mmInStream &#61; tmpIn; mmOutStream &#61; tmpOut; } &#64;Override public void run() { byte[] buffer &#61; new byte[1024]; // buffer store for the stream int bytes; // bytes returned from read() // Keep listening to the InputStream until an exception occurs while (true) { try { // Read from the InputStream bytes &#61; mmInStream.available(); if (bytes !&#61; 0) { buffer &#61; new byte[1024]; SystemClock.sleep(3000); //pause and wait for rest of data. Adjust this depending on your sending speed. bytes &#61; mmInStream.available(); // how many bytes are ready to be read? bytes &#61; mmInStream.read(buffer, 0, bytes); // record how many bytes we actually read } } catch (IOException e) { e.printStackTrace(); break; } } } /* Call this from the main activity to send data to the remote device */ public void write(String input) { byte[] bytes &#61; input.getBytes(); //converts entered String into bytes try { mmOutStream.write(bytes); } catch (IOException e) { } } /* Call this from the main activity to shutdown the connection */ public void cancel() { try { mmSocket.close(); } catch (IOException e) { } } }쓰레드입니다. 진짜 잘 모르겠습니다....

컴포지트 · Answer

소켓은 언제든지 끊길 수 있습니다. 따라서 소켓을 읽는 도중에도 소켓이 유지되는지 확인하는 방어로직을 구상하시길.

simsim2 · Answer

최근에 저도 겪었었는데..혹시 Bluetooth 맞으신지BLE 는 아니신지 확인해보는것도 좋을수있을듯합니다.

java.io.IOException: read failed, socket might closed or timeout, read ret: -1 에러나는데 이유를 잘 모르겠습니다.

2개의 답변

#bluetooth 목록