在Raspberry Pi中将android- bluez连接到bluez

Question

我需要将android-BluetoothChat连接到树莓派B+，最好是无头的。我安装了脚本here来让Pi自动接受配对请求，我的安卓平板电脑(一台沃尔玛ONN)显示它与我的Pi配对。正确的MAC地址显示在BluetoothAdapter.getDefaultAdapter().getBondedDevices()的列表中。

当我运行rfcomm-server.py示例脚本时，它最终显示为Accepted connection from ('B4:4B:D6:EE:A2:1C', 1)。

但是android-BluetoothChat应用程序中的mmSocket.connect()行失败了，出现了可怕的错误java.io.IOException: read failed, socket might closed or timeout, read ret: -1。

当我invoke秘密方法createRfcommSocket()时，我仍然得不到连接，StackOverflow推荐这个方法来消除这个错误。

那么接下来我应该尝试什么呢？

另一个问题:接口中的UUID是用来做什么的？服务器( Pi)是否需要匹配此UUID？我没有看到android-BluetoothChat程序随机生成一个的原因。

这是一些日志，在任何人不得不要求它之前：

D/BluetoothChatService: connect to: B8:27:EB:8D:DC:E7
D/BluetoothChatService: updateUserInterfaceTitle() 1 -> 2
I/BluetoothChatService: BEGIN mConnectThread SocketType:Insecure
W/BluetoothAdapter: getBluetoothService() called with no BluetoothManagerCallback
V/PhoneWindow: DecorView setVisiblity: visibility = 0, Parent = android.view.ViewRootImpl@d4eebde, this = DecorView@22c41bf[MainActivity]
D/Surface: Surface::disconnect(this=0x7c9bc96000,api=1)
D/Surface: Surface::disconnect(this=0x7c9bc96000,api=1)
W/libEGL: EGLNativeWindowType 0x7c9bc96010 disconnect failed
V/PhoneWindow: DecorView setVisiblity: visibility = 4, Parent = android.view.ViewRootImpl@5720682, this = DecorView@7351cf7[DeviceListActivity]
D/View: [Warning] assignParent to null: this = DecorView@7351cf7[DeviceListActivity]
D/BluetoothSocket: close() this: android.bluetooth.BluetoothSocket@53c843d, channel: -1, mSocketIS: android.net.LocalSocketImpl$SocketInputStream@f3d1432, mSocketOS: android.net.LocalSocketImpl$SocketOutputStream@9d50583mSocket: android.net.LocalSocket@db37300 impl:android.net.LocalSocketImpl@4722739 fd:java.io.FileDescriptor@ba4417e, mSocketState: INIT
D/BluetoothChatService: updateUserInterfaceTitle() 2 -> 0
D/BluetoothChatService: start
D/BluetoothSocket: close() this: android.bluetooth.BluetoothSocket@53c843d, channel: -1, mSocketIS: android.net.LocalSocketImpl$SocketInputStream@f3d1432, mSocketOS: android.net.LocalSocketImpl$SocketOutputStream@9d50583mSocket: null, mSocketState: CLOSED
D/BluetoothChatService: updateUserInterfaceTitle() 0 -> 0
D/ViewRootImpl[Toast]: hardware acceleration = true , fakeHwAccelerated = false, sRendererDisabled = false, forceHwAccelerated = false, sSystemRendererDisabled = false
D/Surface: Surface::connect(this=0x7c8b558000,api=1)
D/Surface: Surface::allocateBuffers(this=0x7c8b558000)
D/mali_winsys: EGLint new_window_surface(egl_winsys_display *, void *, EGLSurface, EGLConfig, egl_winsys_surface **, EGLBoolean) returns 0x3000
D/Surface: Surface::disconnect(this=0x7c8b558000,api=1)
D/Surface: Surface::disconnect(this=0x7c8b558000,api=1)
W/libEGL: EGLNativeWindowType 0x7c8b558010 disconnect failed
D/View: [Warning] assignParent to null: this = android.widget.LinearLayout{3348471 V.E...... ......ID 0,0-202,49}
I/d.bluetoothcha: Compiler allocated 5MB to compile void android.view.ViewRootImpl.performTraversals()

Answer 1

解决方案是根据How to connect to Raspberry pi with an android app over bluetooth将MY_UUID_INSECURE更改为00001101-0000-1000-8000-00805F9B34FB