안드로이드에서 제공하는 블루투스 예제를 가져와서 어플을 만들었는데 다만들고 보니 치명적인 에러가 있네요;;
처음 다운받거나 프로세스를 죽이면 정상동작하는데, 뒤로가기를 눌러 재 실행하면 이상하게 동작합니다.
개발중에 에러로그를 봤는데 동작하는데 별 문제 없길래 대수롭지 않게 넘겼는데, 이런 심각한 문제가 있네요;; 소켓을 잘 닫지 않아서 그런거라고 하는데 어디에 어떤코드를 넣어줘야할지 모르겠습니다.
여기저기 검색하고 삽질해가며 개발중인데 이 부분은 감이 안잡히네요 ㅠㅠ 도와주세요 ㅠㅠ
09-14 22:29:05.739 11758-11775/kr.hstec.bluewingsa E/SEOK﹕ accept() failed
java.io.IOException: read failed, socket might closed or timeout, read ret: -1
at android.bluetooth.BluetoothSocket.readAll(BluetoothSocket.java:625)
at android.bluetooth.BluetoothSocket.waitSocketSignal(BluetoothSocket.java:602)
at android.bluetooth.BluetoothSocket.accept(BluetoothSocket.java:419)
at android.bluetooth.BluetoothServerSocket.accept(BluetoothServerSocket.java:131)
at android.bluetooth.BluetoothServerSocket.accept(BluetoothServerSocket.java:117)
at kr.hstec.bluewingsa.BluetoothService$AcceptThread.run(BluetoothService.java:297)
아래 소스에서 tmp에 null 값이 들어오는거 같은데 이유를 모르겠습니다 ㅠㅠ
private class AcceptThread extends Thread {
// The local server socket
private final BluetoothServerSocket mmServerSocket;
public AcceptThread() {
BluetoothServerSocket tmp = null;
// Create a new listening server socket
try {
tmp = mAdapter.listenUsingRfcommWithServiceRecord(NAME, MY_UUID);
} catch (IOException e) {
Log.e(TAG, "listen() failed", e);
}
mmServerSocket = tmp;
}
public void run() {
Log.d(TAG, "BEGIN mAcceptThread" + this);
setName("AcceptThread");
BluetoothSocket socket = null;
// Listen to the server socket if we're not connected
while (mState != STATE_CONNECTED) {
try {
// This is a blocking call and will only return on a
// successful connection or an exception
socket = mmServerSocket.accept();
} catch (IOException e) {
Log.e(TAG, "accept() failed", e);
break;
}
// If a connection was accepted
if (socket != null) {
synchronized (BluetoothService.this) {
switch (mState) {
case STATE_LISTEN:
case STATE_CONNECTING:
// Situation normal. Start the connected thread.
connected(socket, socket.getRemoteDevice());
break;
case STATE_NONE:
case STATE_CONNECTED:
// Either not ready or already connected. Terminate new socket.
try {
socket.close();
} catch (IOException e) {
Log.e(TAG, "Could not close unwanted socket", e);
}
break;
}
}
}
}
Log.i(TAG, "END mAcceptThread");
}
public void cancel() {
Log.d(TAG, "cancel " + this);
try {
mmServerSocket.close();
} catch (IOException e) {
Log.e(TAG, "close() of server failed", e);
}
}
}
09-14 22:29:06.009 11758-12152/kr.hstec.bluewingsa E/SEOK﹕ disconnected
java.io.IOException: bt socket closed, read return: -1
at android.bluetooth.BluetoothSocket.read(BluetoothSocket.java:526)
at android.bluetooth.BluetoothInputStream.read(BluetoothInputStream.java:96)
at java.io.InputStream.read(InputStream.java:162)
at kr.hstec.bluewingsa.BluetoothService$ConnectedThread.run(BluetoothService.java:440)
아래에 bytes = mmInStream.read(buffer); 에서 에러입니다.
private class ConnectedThread extends Thread {
...
public void run() {
Log.i(TAG, "BEGIN mConnectedThread");
byte[] buffer = new byte[1024];
int bytes = 0;
// Keep listening to the InputStream while connected
while (true) {
try {
// Read from the InputStream
bytes = mmInStream.read(buffer);
// Send the obtained bytes to the UI Activity
mHandler.obtainMessage(Constants.MESSAGE_READ, bytes, -1, buffer)
.sendToTarget();
} catch (IOException e) {
Log.e(TAG, "disconnected", e);
connectionLost();
// Start the service over to restart listening mode
BluetoothService.this.start();
break;
}
}
}
/**
* Write to the connected OutStream.
*
* @param buffer The bytes to write
*/
public void write(byte[] buffer) {
try {
mmOutStream.write(buffer);
// Share the sent message back to the UI Activity
mHandler.obtainMessage(Constants.MESSAGE_WRITE, -1, -1, buffer)
.sendToTarget();
} catch (IOException e) {
Log.e(TAG, "Exception during write", e);
}
}
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) {
Log.e(TAG, "close() of connect socket failed", e);
}
}
}
