我的应用程序的一部分通过蓝牙连接到设备，通常工作正常，但偶尔无法连接，我收到以下错误
03-11 10:29:20.328: E/BluetoothComService(8059): accept() failed
03-11 10:29:20.328: E/BluetoothComService(8059): java.io.IOException: Operation Canceled
03-11 10:29:20.328: E/BluetoothComService(8059): at android.bluetooth.BluetoothSocket.acceptNative(Native Method)
03-11 10:29:20.328: E/BluetoothComService(8059): at android.bluetooth.BluetoothSocket.accept(BluetoothSocket.java:316)
03-11 10:29:20.328: E/BluetoothComService(8059): at android.bluetooth.BluetoothServerSocket.accept(BluetoothServerSocket.java:105)
03-11 10:29:20.328: E/BluetoothComService(8059): at android.bluetooth.BluetoothServerSocket.accept(BluetoothServerSocket.java:91)
03-11 10:29:20.328: E/BluetoothComService(8059): at com.mypackage.name.bluetooth.BluetoothService$AcceptThread.run(BluetoothService.java:298)
这是我得到异常的行
socket = mmServerSocket.accept();
这是完整的 AcceptThread
private class AcceptThread extends Thread {
// The local server socket
private BluetoothServerSocket mmServerSocket;
public boolean successInit = false;
public AcceptThread() {
closeAllConnections();
/*
* if(mmServerSocket != null) { try { mmServerSocket.close(); } catch
* (IOException e) { e.printStackTrace(); } }
*/
BluetoothServerSocket tmp = null;
// Create a new listening server socket
while (!successInit) {
try {
tmp = mAdapter
.listenUsingRfcommWithServiceRecord(NAME, MY_UUID);
successInit = true;
} catch (Exception e) {
successInit = false;
}
}
/*
* try { tmp = mAdapter.listenUsingRfcommWithServiceRecord(NAME,
* MY_UUID); successInit= true; } catch (IOException e) { Log.e(TAG,
* "listen() failed", e); tmp = null; successInit = false; }
*/
mmServerSocket = tmp;
}
public void run() {
if (D)
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
mAdapter.cancelDiscovery();
socket = mmServerSocket.accept();
} catch (IOException e) {
Log.e(TAG, "accept() failed", e);
Log.e("Error", "This isn't connecting");
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;
}
}
}
}
if (D)
Log.i(TAG, "END mAcceptThread");
}
public void cancel() {
if (D)
Log.d(TAG, "cancel " + this);
try {
mmServerSocket.close();
} catch (IOException e) {
Log.e(TAG, "close() of server failed", e);
}
}
}
这是我在开始时调用的函数AcceptThread，希望关闭所有内容以重新启动它
public void closeAllConnections() {
if (mmInStream != null) {
try {mmInStream.close();}
catch (Exception e){Log.e(TAG, "close() of connect socket failed", e);}
}
if (mmOutStream != null) {
try {mmOutStream.close();}
catch (Exception e){Log.e(TAG, "close() of connect socket failed", e);}
}
if (mmSocket != null) {
try {
mmSocket.close();
//mmSocket.connect();
}
catch (IOException e) {
Log.e(TAG, "close() of connect socket failed", e);
}
}
}
我已经阅读了蓝牙文档和 SO 问题，但我没有找到任何适合我的东西，这让我有点困惑，因为这是我第一次通过 BT 连接。
笔记
发生这种情况时，我发现的唯一“修复”是关闭 BT 适配器，强制关闭程序，重新启动 BT 适配器并重新启动应用程序，这显然是不好的。我尝试以编程方式重新启动适配器，但仍然无法连接。
谁能看到我的 BlutoothService 类中可能有什么问题，该类AcceptThread位于何处？或者我将如何解决这个问题？谢谢！
更新
事实上，似乎连接有时在一个上关闭Thread并试图在另一个上重新连接。问题是我无法弄清楚是什么导致它尝试单独连接Thread或在发生这种情况时如何修复它。
我可以成功重现此问题的唯一方法是，如果我的 BT 设备已关闭，那么我将关闭 BT 适配器。当我重新打开一切时，我得到了异常并且无法连接。我有客户随机和定期发生这种情况，所以我希望这些问题是相关的。