java - Android 蓝牙套接字卡住应用程序

Question

我有一个关于蓝牙 socket 的奇怪问题。如果我创建套接字并稍后关闭应用程序，Android 设备会因 CPU 负载非常高而卡住。

这里是我的示例代码:

  // open socket
  public ConnectThread(final BluetoothDevice device) {
    Log.v(ConnectThread.class.getName(), "Try to get a socket");

    try {
      this.socket = device.createRfcommSocketToServiceRecord(UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"));
    } catch (IOException e) {
      Log.e(ConnectThread.class.getName(), e.getMessage());
    }

    Log.v(ConnectThread.class.getName(), "Got a socket");
  }

  // close it
  public void cancel() {
    try {
      Log.v(ConnectThread.class.getName(), "cancel");
      this.socket.close();
    } catch (IOException e) {
      Log.e(ConnectThread.class.getName(), e.getMessage());
    }
  }

尽管我使用 close() 方法关闭套接字，但我不明白为什么 Android 设备在我的应用程序关闭后卡住。请注意，它只创建了套接字，但没有连接...

编辑:

好的，有示例代码:

package com.ss.test;

import java.io.IOException;
import java.util.UUID;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.os.Bundle;
import android.util.Log;

public class testBump extends Activity {
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    BluetoothDevice device = this.bluetoothAdapter.getRemoteDevice("58:B0:35:6F:8E:C7");

    Log.e(testBump.class.getName(), "Try to get a socket");

    try {
      this.socket = device.createRfcommSocketToServiceRecord(UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"));
    } catch (IOException e) {
      Log.e(testBump.class.getName(), e.getMessage());
    }

    Log.e(testBump.class.getName(), "Got a socket");

    Log.e(testBump.class.getName(), "DESTROY");

    try {
      this.socket.close();
    } catch (IOException e) {
      Log.e(testBump.class.getName(), e.getMessage());
    }

    Log.e(testBump.class.getName(), "DESTROYED");

  }

  @Override
  public void onDestroy() {
    super.onDestroy();
  }

  private BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
  private BluetoothSocket socket = null;
}

和日志:

12-16 11:42:40.558: ERROR/com.ss.test.testBump(3161): Try to get a socket
12-16 11:42:40.558: DEBUG/BluetoothSocket.cpp(3161): initSocketNative
12-16 11:42:40.558: INFO/BLZ20_WRAPPER(3161): blz20_wrp_socket: fam 31, type 1, prot BTPROTO_RFCOMM
12-16 11:42:40.558: DEBUG/BLZ20_WRAPPER(3161): blz20_init: initializing...
12-16 11:42:40.558: DEBUG/BTL_IFC_WRP(3161): wsactive_init: init active list
12-16 11:42:40.562: INFO/BTL_IFC(3161): main_client_thread: Client main thread starting
12-16 11:42:40.651: DEBUG/MediaProvider(2590): mMediaScannerReceiver - intent.getAction : android.intent.action.ACTION_MEDIA_SCANNER_PROGRESS
12-16 11:42:40.769: DEBUG/MediaScanner(2590): Normal  556 done (3600msec)
12-16 11:42:40.769: DEBUG/MediaScanner(2590): Sync..
12-16 11:42:40.851: DEBUG/MediaScanner(2590): Start Nazca /mnt/sdcard/external_sd
12-16 11:42:40.851: ERROR/MediaScanner(2590): Cannot get device path from mount info. Check SD Unmounted.
12-16 11:42:40.851: DEBUG/MediaScanner(2590): Normal Meta & DB Insert/Update Start
12-16 11:42:40.851: DEBUG/MediaScanner(2590): Normal    0 done (1msec)
12-16 11:42:40.855: DEBUG/MediaScanner(2590): postscan enter: directories - /mnt/sdcard
12-16 11:42:40.874: DEBUG/MediaScanner(2590): start checking FileCacheEntry
12-16 11:42:40.878: DEBUG/MediaScanner(2590): end checking FileCacheEntry
12-16 11:42:40.940: DEBUG/MediaScanner(2590): postscan return
12-16 11:42:40.940: DEBUG/MediaScanner(2590):  prescan time: 109ms
12-16 11:42:40.940: DEBUG/MediaScanner(2590):     scan time: 8327ms
12-16 11:42:40.940: DEBUG/MediaScanner(2590): postscan time: 86ms
12-16 11:42:40.940: DEBUG/MediaScanner(2590):    total time: 8522ms
12-16 11:42:40.956: DEBUG/MediaProvider(2590): mMediaScannerReceiver - intent.getAction : android.intent.action.MEDIA_SCANNER_FINISHED
12-16 11:42:40.960: ERROR/CscReceiver(2585): onReceive android.intent.action.MEDIA_SCANNER_FINISHED
12-16 11:42:40.960: DEBUG/CscReceiver(2585): isCSCimage
12-16 11:42:40.960: INFO/global(2585): Default buffer size used in BufferedReader constructor. It would be better to be explicit if an 8k-char buffer is required.
12-16 11:42:40.960: DEBUG/CscParser(2585): ID_path =/system/SW_Configuration.xml
12-16 11:42:40.960: DEBUG/CscParser(2585): return ok ID path /system/SW_Configuration.xml
12-16 11:42:40.960: DEBUG/CscReceiver(2585): Media DB Scanner finished.
12-16 11:42:40.960: ERROR/CscReceiver(2585): check_9
12-16 11:42:40.972: VERBOSE/MediaProvider(2590): Resuming ThumbWorker
12-16 11:42:40.972: INFO/MediaProvider(2590): MediaScanner stopped!!!
12-16 11:42:40.983: DEBUG/MediaScannerService(2590): done scanning volume external
12-16 11:42:40.983: INFO/MediaScannerService(2590): !@endofMediascannerservice
12-16 11:42:41.034: INFO/TEST(3050): Got intent with action Intent { act=android.intent.action.MEDIA_SCANNER_FINISHED dat=file:///mnt/sdcard cmp=com.cooliris.media/com.cooliris.cache.BootReceiver (has extras) }
12-16 11:42:41.034: DEBUG/BootReceiver(3050): ACTION_MEDIA_SCANNER_FINISHED: path = /mnt/sdcard
12-16 11:42:41.034: DEBUG/BootReceiver(3050): ImageManager.hasStorage()truetrue
12-16 11:42:41.190: INFO/CacheService(3050): Refreshing cache.
12-16 11:42:41.190: ERROR/DiskCache(3050): Delete All Cache Files!!!
12-16 11:42:41.210: ERROR/MTPRx(3059): In MtpReceiverandroid.intent.action.MEDIA_SCANNER_FINISHED
12-16 11:42:41.214: WARN/MTPRx(3059): Media scanning is finished
12-16 11:42:41.214: INFO/System.out(3059): setting Media scanner status0
12-16 11:42:41.214: INFO/System.out(3059): After setting Media scanner status0
12-16 11:42:41.245: WARN/BackupManagerService(2496): dataChanged but no participant pkg='com.android.providers.settings' uid=10035
12-16 11:42:41.249: DEBUG/MediaScannerReceiver(2590): onReceive : EXTERNAL scan FINISHED.
12-16 11:42:41.261: DEBUG/MediaReceiver(3065): MEDIA SCANNER FINISHED.
12-16 11:42:41.562: DEBUG/BLZ20_WRAPPER(3161): blz20_init: success
12-16 11:42:41.562: INFO/BTL_IFC(3161): BTL_IFC_RegisterSubSystem: Register subsystem [BTS]
12-16 11:42:41.562: INFO/BTL_IFC(3161): btl_ifc_ctrl_connect: Connect control channel for subsystem [BTS]
12-16 11:42:41.562: DEBUG/BTL_IFC_WRP(3161): wrp_sock_create: CTRL
12-16 11:42:41.562: DEBUG/BTL_IFC_WRP(3161): wrp_alloc_new_sock: wrp_alloc_new_sock sub 1
12-16 11:42:41.562: DEBUG/BTL_IFC_WRP(3161): wrp_sock_create: 32
12-16 11:42:41.562: DEBUG/BTL_IFC_WRP(3161): wrp_sock_connect: wrp_sock_connect brcm.bt.dtun:9000 (32)
12-16 11:42:41.562: DEBUG/BTL_IFC_WRP(3161): DTUN_MAKE_LOCAL_SERVER_NAME return name: brcm.bt.dtun.9000
12-16 11:42:41.562: INFO/BTL-IFS(2751): main_server_thread: [CTRL] Client connected (22)
12-16 11:42:41.562: INFO/BTL_IFC_WRP(3161): wrp_sock_connect: Connected. (32)
12-16 11:42:41.562: INFO/BTL_IFC(3161): send_ctrl_msg: [BTL_IFC CTRL] send BTLIF_REGISTER_SUBSYS_REQ (BTS) 0 pbytes (hdl 32)
12-16 11:42:41.562: INFO/BTL-IFS(2751): attach_client: multiclient index 1
12-16 11:42:41.562: INFO/BTL-IFS(2751): attach_client: ######## Attached client subsystem BTS (22) ######## 
12-16 11:42:41.562: INFO/BTL-IFS(2751): btl_if_notify_local_event: Notify local event BTLIF_SUBSYSTEM_ATTACHED
12-16 11:42:41.562: DEBUG/(2751): btlif_bts_api_ctrl_cb: btlif_bts_api_ctrl_cb : id BTLIF_SUBSYSTEM_ATTACHED (4112) on hdl 22
12-16 11:42:41.562: INFO/(2751): btlif_rfc_ctrl_chan_attached: client attached ctrl handle 22
12-16 11:42:41.562: DEBUG/BTL-IFS(2751): send_registration_rsp: send_registration_rsp [0]
12-16 11:42:41.562: INFO/BTL-IFS(2751): send_ctrl_msg: [BTL_IFS CTRL] send BTLIF_REGISTER_SUBSYS_RSP (CTRL) 2 pbytes (hdl 22)
12-16 11:42:41.562: DEBUG/BTL_IFC(3161): BTL_IFC_RegisterSubSystem: add new ctrl fd to active set
12-16 11:42:41.562: DEBUG/BTL_IFC_WRP(3161): wrp_wsock_create: BTS
12-16 11:42:41.562: DEBUG/BTL_IFC_WRP(3161): wrp_alloc_new_sock: wrp_alloc_new_sock sub 15
12-16 11:42:41.562: DEBUG/BTL_IFC_WRP(3161): wrp_wsock_create: 33
12-16 11:42:41.562: DEBUG/BLZ20_WRAPPER(3161): btsk_alloc_add: success
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_socket: return 33
12-16 11:42:41.562: DEBUG/BLZ20_WRAPPER(3161): blz20_wrp_setsockopt:  fd (-1:33), bta -1, rc 0, wflags 0x0, cflags 0x0, port 0
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_setsockopt: configure rfcomm lm mode 0x26, (master:0, auth 1, enc 1)
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_setsockopt: success
12-16 11:42:41.562: DEBUG/BLZ20_WRAPPER(3161): blz20_wrp_setsockopt:  fd (-1:33), bta -1, rc 0, wflags 0x0, cflags 0x0, port 0
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_setsockopt: configure rfcomm sndbuf len 71680 bytes
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_setsockopt: success
12-16 11:42:41.562: DEBUG/BluetoothSocket.cpp(3161): ...fd 33 created (RFCOMM, lm = 26)
12-16 11:42:41.562: DEBUG/BluetoothSocket.cpp(3161): initSocketFromFdNative
12-16 11:42:41.562: DEBUG/ASOCKWRP(3161): asocket_init
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_fcntl: s 33, cmd 3
12-16 11:42:41.562: DEBUG/BLZ20_WRAPPER(3161): blz20_wrp_fcntl:  fd (-1:33), bta -1, rc 0, wflags 0x0, cflags 0x0, port 0
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_fcntl: s 33, cmd 4
12-16 11:42:41.562: DEBUG/BLZ20_WRAPPER(3161): blz20_wrp_fcntl:  fd (-1:33), bta -1, rc 0, wflags 0x0, cflags 0x0, port 0
12-16 11:42:41.562: DEBUG/BLZ20_WRAPPER(3161): blz20_wrp_fcntl: transparant fcntl
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_fcntl: s 35, cmd 3
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_fcntl: wsock not found, pass through transparantly
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_fcntl: s 35, cmd 4
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_fcntl: wsock not found, pass through transparantly
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_set_asocket: success (33,34,35)
12-16 11:42:41.562: ERROR/com.ss.test.testBump(3161): Got a socket
12-16 11:42:41.562: ERROR/com.ss.test.testBump(3161): DESTROY
12-16 11:42:41.562: DEBUG/BluetoothSocket.cpp(3161): abortNative
12-16 11:42:41.562: DEBUG/ASOCKWRP(3161): asocket_abort [33,34,35]
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_shutdown: s 33, how 2
12-16 11:42:41.562: DEBUG/BLZ20_WRAPPER(3161): blz20_wrp_shutdown:  fd (-1:33), bta -1, rc 0, wflags 0x0, cflags 0x0, port 0
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_shutdown: shutdown socket
12-16 11:42:41.562: DEBUG/BLZ20_WRAPPER(3161): blz20_wrp_write: wrote 1 bytes out of 1 on fd 35
12-16 11:42:41.562: DEBUG/BluetoothSocket.cpp(3161): ...asocket_abort(33) complete
12-16 11:42:41.562: DEBUG/BluetoothSocket.cpp(3161): destroyNative
12-16 11:42:41.562: DEBUG/ASOCKWRP(3161): asocket_destroy
12-16 11:42:41.562: DEBUG/ASOCKWRP(3161): asocket_abort [33,34,35]
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_shutdown: s 33, how 2
12-16 11:42:41.562: DEBUG/BLZ20_WRAPPER(3161): blz20_wrp_shutdown:  fd (-1:33), bta -1, rc 0, wflags 0x0, cflags 0x0, port 0
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_shutdown: shutdown socket
12-16 11:42:41.562: DEBUG/BLZ20_WRAPPER(3161): blz20_wrp_write: wrote 1 bytes out of 1 on fd 35
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_close: s 35
12-16 11:42:41.562: DEBUG/BLZ20_WRAPPER(3161): blz20_wrp_close: std close (35)
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_close: s 34
12-16 11:42:41.562: DEBUG/BLZ20_WRAPPER(3161): blz20_wrp_close: std close (34)
12-16 11:42:41.562: INFO/BLZ20_WRAPPER(3161): blz20_wrp_close: s 33
12-16 11:42:41.569: DEBUG/BLZ20_WRAPPER(3161): blz20_wrp_close:  fd (-1:33), bta -1, rc 0, wflags 0x0, cflags 0x0, port 0
12-16 11:42:41.569: INFO/BLZ20_WRAPPER(3161): __close_prot_rfcomm: fd 33
12-16 11:42:41.569: DEBUG/BTL_IFC(3161): BTL_IFC_CtrlSend: BTL_IFC_CtrlSend
12-16 11:42:41.569: INFO/BTL_IFC(3161): send_ctrl_msg: [BTL_IFC CTRL] send BTLIF_BTS_RFC_CLOSE (BTS) 8 pbytes (hdl 32)
12-16 11:42:41.569: DEBUG/(2751): btlif_bts_api_ctrl_cb: btlif_bts_api_ctrl_cb : id BTLIF_BTS_RFC_CLOSE (4468) on hdl 22
12-16 11:42:41.569: DEBUG/(2751): btlif_rfc_close: scn 0, sock 33
12-16 11:42:41.569: INFO/(2751): btlif_rfc_close: channel not found scn 0, sock 33
12-16 11:42:41.569: DEBUG/BTL_IFC_WRP(3161): wrp_close_s_only: wrp_close_s_only [33] (33:-1) []
12-16 11:42:41.569: DEBUG/BTL_IFC_WRP(3161): wrp_close_s_only: data socket closed
12-16 11:42:41.569: DEBUG/BTL_IFC_WRP(3161): wsactive_del: delete wsock 33 from active list [ad3f5f70]
12-16 11:42:41.569: DEBUG/BTL_IFC_WRP(3161): wrp_close_s_only: wsock fully closed, return to pool
12-16 11:42:41.569: DEBUG/BLZ20_WRAPPER(3161): btsk_free: success
12-16 11:42:41.569: DEBUG/BluetoothSocket.cpp(3161): ...asocket_destroy(33) complete
12-16 11:42:41.569: ERROR/com.ss.test.testBump(3161): DESTROYED

从日志中可以看出，套接字关闭成功。现在，退出应用程序(它将在后台运行)，运行到任务管理器并终止应用程序。在那一刻，Android 设备将因 CPU 负载非常高而死机。

编辑 2:

我发现，该问题仅在 Samsung GALAXY Tab 设备上重现。例如，我无法用我的 HTC Desire 重现它。

Answer 1

我发现一个可行的解决方案(适用于三星 galaxy mini)——这对用户来说非常不友好，而且“设计”不好(但 broadcom 固件错误无论如何都不是好的“设计”)——但它是比让用户的手机死机更好 - 完成后关闭蓝牙:

在我的 onDestroy() 和 onBackPressed() 中——我调用了我的 cleanup() 函数，它具有如下内容:

if(mBluetoothAdapter != null)
{           
mBluetoothAdapter.disable();            
}    
mBluetoothAdapter = null;