我正在为 SDK 10 (2.3.3) 编译:

android:minSdkVersion="10"
android:targetSdkVersion="16"

我正在两部索尼爱立信智能手机上进行测试。一个是 Android 2.3.7，另一个是 4.0.1。

我正在使用 listenUsingInsecureRfcommWithServiceRecord 在蓝牙上打开一个新的服务器套接字并监听连接。

如果连接被成功接受，那么一切正常。我什至可以尝试取消服务器套接字，但这似乎不会影响刚刚创建的连接套接字。

但是当我想在接受任何连接之前取消服务器套接字时，一旦 bluetoothServerSocket.close(); 行被执行，整个 Activity 就会关闭并且进程会终止。此外，这不是我可以处理的常规异常。

实际上连 logcat 本身都退出了!!我必须再次快速执行它以获取您在下面看到的错误:

Zygote  D  Process 25471 terminated by signal (11)
  295         InputDispatcher  W  channel '2c2e20a8 com.pligor.test/activities.MainActivity (server)' ~ Consumer closed input channel or an error occurred.  events=0x8
  295         InputDispatcher  E  channel '2c2e20a8 com.pligor.test/activities.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
  295                dalvikvm  D  GC_FOR_ALLOC freed 1299K, 21% free 13252K/16583K, paused 93ms
  295         InputDispatcher  W  Attempted to unregister already unregistered input channel '2c2e20a8 com.pligor.test/activities.MainActivity (server)'
  295        BluetoothService  D  Tracked app 25471 diedType:10
  295        BluetoothService  D  Removing service record 10009 for pid 25471
  132          SurfaceFlinger  D  Release buffer at 0x61c08
  295           WindowManager  I  WINDOW DIED Window{2c2e20a8 com.pligor.test/activities.MainActivity paused=false}
  295         ActivityManager  I  Process com.pligor.test (pid 25471) has died.
  295         ActivityManager  W  Force removing ActivityRecord{2c021800 com.pligor.test/activities.MainActivity}: app died, no saved state
  295           WindowManager  W  Failed looking up window
  295           WindowManager  W  java.lang.IllegalArgumentException: Requested window android.os.BinderProxy@2bf3e798 does not exist
  295           WindowManager  W    at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:7165)
  295           WindowManager  W    at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:7156)
  295           WindowManager  W    at com.android.server.wm.WindowState$DeathRecipient.binderDied(WindowState.java:1545)
  295           WindowManager  W    at android.os.BinderProxy.sendDeathNotice(Binder.java:417)
  295           WindowManager  W    at dalvik.system.NativeStart.run(Native Method)
  295           WindowManager  I  WIN DEATH: null
  295      BluetoothEventLoop  D  Property Changed: UUIDs : 11
  295    hAdapterStateMachine  D  BluetoothOn process message: 51
  295     InputManagerService  W  Got RemoteException sending setActive(false) notification to pid 25471 uid 10040

注意:由信号 (11) 终止的进程表示段错误 (http://en.wikipedia.org/wiki/SIGSEGV)。

编辑

我使用以下代码 (Scala) 创建了蓝牙 服务器套接字:

private val bluetoothServerSocket: BluetoothServerSocket = try {
    bluetoothAdapter.listenUsingInsecureRfcommWithServiceRecord(MY_SERVICE_NAME_INSE‌​CURE, MY_UUID_INSECURE); 
} 
catch { 
    case e: IOException => throw new ServerSocketException; 
} 

我使用此代码关闭蓝牙 套接字:

try { 
    isCancelled = true; 
    bluetoothServerSocket.close(); 
} catch { 
    case e: IOException => throw new NotClosedException; 
}

最佳答案

我遇到过类似的问题，问题的根本原因是在套接字上多次调用关闭。为了纠正这个问题，我将我的蓝牙套接字包装在一个特殊的类中，以防止多次调用 close 方法。

请注意，关闭由蓝牙套接字创建的流能够在套接字上调用关闭。以下解决了这个问题。

public class CloseOnceBluetoothSocket 
{
private final BluetoothSocket mSocket;
private boolean mIsClosed;

public CloseOnceBluetoothSocket(BluetoothSocket socket)
{
    this.mSocket = socket;
}

public void connect() throws IOException
{
    mSocket.connect();
}

public InputStream getInputStream() throws IOException
{
    return new FilterInputStream(mSocket.getInputStream()) {
        @Override
        public void close() throws IOException
        {
            CloseOnceBluetoothSocket.this.close();
        }
    };
}

public OutputStream getOutputStream() throws IOException
{
    return new FilterOutputStream(mSocket.getOutputStream()) {
        @Override
        public void close() throws IOException
        {
            CloseOnceBluetoothSocket.this.close();
        }
    };
}

public void close() throws IOException
{
    synchronized (mSocket) {
        if (!mIsClosed) {
            mSocket.close();
            mIsClosed = true;
        }
    }
}
}

关于android - 在接受之前取消蓝牙服务器套接字时，整个过程都会结束。为什么？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/14946927/