我在我的应用程序中使用蓝牙时遇到了问题。似乎在创建 28 BluetoothSocket
/之后BluetoothServerSockets
,所有端口都被占用了。套接字不需要同时打开,自从启用蓝牙以来,它只有 28 个套接字。
这可以使用Android 示例中提供的 BluetoothChat 示例进行复制。只需打开和关闭应用程序 15 次(应用程序每次创建 2 个套接字)。第 15 次,它会崩溃,并且会继续崩溃,直到您禁用然后重新启用蓝牙:
12-06 18:43:58.177: E/BluetoothSocket(18530): bindListen, fail to get port number, exception: java.io.IOException: read failed, socket might closed, read ret: -1
12-06 18:43:58.193: E/BluetoothChatService(18530): Socket Type: Insecurelisten() failed
12-06 18:43:58.193: E/BluetoothChatService(18530): java.io.IOException: Error: -1
12-06 18:43:58.193: E/BluetoothChatService(18530): at android.bluetooth.BluetoothAdapter.createNewRfcommSocketAndRecord(BluetoothAdapter.java:1035)
12-06 18:43:58.193: E/BluetoothChatService(18530): at android.bluetooth.BluetoothAdapter.listenUsingInsecureRfcommWithServiceRecord(BluetoothAdapter.java:982)
12-06 18:43:58.193: E/BluetoothChatService(18530): at com.example.android.BluetoothChat.BluetoothChatService$AcceptThread.<init>(BluetoothChatService.java:280)
12-06 18:43:58.193: E/BluetoothChatService(18530): at com.example.android.BluetoothChat.BluetoothChatService.start(BluetoothChatService.java:119)
12-06 18:43:58.193: E/BluetoothChatService(18530): at com.example.android.BluetoothChat.BluetoothChat.onResume(BluetoothChat.java:131)
12-06 18:43:58.193: E/BluetoothChatService(18530): at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1185)
12-06 18:43:58.193: E/BluetoothChatService(18530): at android.app.Activity.performResume(Activity.java:5182)
12-06 18:43:58.193: E/BluetoothChatService(18530): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2732)
12-06 18:43:58.193: E/BluetoothChatService(18530): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2771)
12-06 18:43:58.193: E/BluetoothChatService(18530): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2235)
12-06 18:43:58.193: E/BluetoothChatService(18530): at android.app.ActivityThread.access$600(ActivityThread.java:141)
12-06 18:43:58.193: E/BluetoothChatService(18530): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
12-06 18:43:58.193: E/BluetoothChatService(18530): at android.os.Handler.dispatchMessage(Handler.java:99)
12-06 18:43:58.193: E/BluetoothChatService(18530): at android.os.Looper.loop(Looper.java:137)
12-06 18:43:58.193: E/BluetoothChatService(18530): at android.app.ActivityThread.main(ActivityThread.java:5039)
12-06 18:43:58.193: E/BluetoothChatService(18530): at java.lang.reflect.Method.invokeNative(Native Method)
12-06 18:43:58.193: E/BluetoothChatService(18530): at java.lang.reflect.Method.invoke(Method.java:511)
12-06 18:43:58.193: E/BluetoothChatService(18530): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
12-06 18:43:58.193: E/BluetoothChatService(18530): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
12-06 18:43:58.193: E/BluetoothChatService(18530): at dalvik.system.NativeStart.main(Native Method)
套接字关闭后有没有办法释放端口?