Question

我将我的Android手机连接到HC-05蓝牙模块。它有点工作，我可以完成一些I / O，但我也有一些错误。我想要处理的第一个错误是，每次连接到我的蓝牙设备时，我都会收到＆＃34; Service Discovery Failed＆＃34; IO Exception，除了第一次。只有重新启动手机后才会干净连接。所以，我期待一些东西是开放的，但我唯一能想到的就是套接字，我就把它关闭了。

09-16 13:55:16.463 8085-8085/ltd.arctura.laro_can_bus I/BluetoothSocket_MTK: [JSR82] Bluetooth Socket Constructor
09-16 13:55:16.463 8085-8085/ltd.arctura.laro_can_bus I/BluetoothSocket_MTK: [JSR82] type=1 fd=-1 auth=false encrypt=false port=-1
09-16 13:55:16.466 8085-8085/ltd.arctura.laro_can_bus I/BluetoothSocket_MTK: [JSR82] connect: do SDP
09-16 13:55:16.738 8085-8098/ltd.arctura.laro_can_bus I/BluetoothSocket_MTK: [JSR82] SdpHelper::onRfcommChannelFound: channel=-1
09-16 13:55:16.757 8085-8085/ltd.arctura.laro_can_bus W/System.err: java.io.IOException: Service discovery failed
09-16 13:55:16.757 8085-8085/ltd.arctura.laro_can_bus W/System.err:     at android.bluetooth.BluetoothSocket$SdpHelper.doSdp(BluetoothSocket.java:813)
09-16 13:55:16.758 8085-8085/ltd.arctura.laro_can_bus W/System.err:     at android.bluetooth.BluetoothSocket.connect(BluetoothSocket.java:382)
09-16 13:55:16.758 8085-8085/ltd.arctura.laro_can_bus W/System.err:     at ltd.arctura.laro_can_bus.bluetooth$1.onItemClick(bluetooth.java:173)
09-16 13:55:16.758 8085-8085/ltd.arctura.laro_can_bus W/System.err:     at android.widget.AdapterView.performItemClick(AdapterView.java:298)
09-16 13:55:16.758 8085-8085/ltd.arctura.laro_can_bus W/System.err:     at android.widget.AbsListView.performItemClick(AbsListView.java:1128)
09-16 13:55:16.759 8085-8085/ltd.arctura.laro_can_bus W/System.err:     at android.widget.AbsListView$PerformClick.run(AbsListView.java:2812)
09-16 13:55:16.759 8085-8085/ltd.arctura.laro_can_bus W/System.err:     at android.widget.AbsListView$1.run(AbsListView.java:3571)
09-16 13:55:16.759 8085-8085/ltd.arctura.laro_can_bus W/System.err:     at android.os.Handler.handleCallback(Handler.java:725)
09-16 13:55:16.759 8085-8085/ltd.arctura.laro_can_bus W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:92)
09-16 13:55:16.759 8085-8085/ltd.arctura.laro_can_bus W/System.err:     at android.os.Looper.loop(Looper.java:153)
09-16 13:55:16.759 8085-8085/ltd.arctura.laro_can_bus W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:5341)
09-16 13:55:16.760 8085-8085/ltd.arctura.laro_can_bus W/System.err:     at java.lang.reflect.Method.invokeNative(Native Method)
09-16 13:55:16.760 8085-8085/ltd.arctura.laro_can_bus W/System.err:     at java.lang.reflect.Method.invoke(Method.java:511)
09-16 13:55:16.760 8085-8085/ltd.arctura.laro_can_bus W/System.err:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:929)
09-16 13:55:16.761 8085-8085/ltd.arctura.laro_can_bus W/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696)
09-16 13:55:16.765 8085-8085/ltd.arctura.laro_can_bus W/System.err:     at dalvik.system.NativeStart.main(Native Method)

重启HC-05或手机上的蓝牙都是不够的。

通过执行以下操作验证了UUID是否正确：

            ParcelUuid[] uuids=btHC05.getUuids();
            if (uuids != null) {
                msg(uuids[0].toString());
            } else {
                msg("No UUID!?");
            }

这会产生与我配置的相同的UUID。

我试图在套接字上做一个.close，但这没有帮助。我没有要关闭的输入或输出流。

该设备已配对并证明有效。我通常不了解Connect（）如何使服务发现失败..我不希望connect（）做任何发现..

private BluetoothAdapter myBluetooth = null;
myBluetooth = BluetoothAdapter.getDefaultAdapter();
BluetoothSocket btSocket = null;
private boolean isBtConnected = false;
String address = null;
static final UUID myUUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");

和

        try {
            if (btSocket == null) {
                BluetoothDevice btHC05 = myBluetooth.getRemoteDevice(address);
                btSocket = btHC05.createInsecureRfcommSocketToServiceRecord(myUUID);
                BluetoothAdapter.getDefaultAdapter().cancelDiscovery();
                btSocket.connect();

            }
        }
        catch (IOException e){
            Toast.makeText(getApplicationContext(), "Error: " + e.toString(), Toast.LENGTH_LONG).show();
            ConnectSuccess = false;
        }

        if (!ConnectSuccess)
        {
            finish();
        }
        else {
            msg("Connected.");

            Intent returnIntent = new Intent();
            returnIntent.putExtra("address",address);
            setResult(MainActivity.RESULT_OK,returnIntent);
            finish();

        }

    }

还有更多，但这是相关的......它有点凌乱，因为我已经尝试了很多错误; - ）

此外，这可能是相关的。所有这些都发生在一个单独的活动中，该活动为用户提供了可供选择的BT设备列表，然后返回到Main_Activity。

服务发现失败，第一次连接除外

0 个答案: