我需要将android-BluetoothChat连接到 Raspberry Pi B+，最好是无头的。我在这里安装了脚本让 Pi 自动接受配对请求，我的 Android 平板电脑（沃尔玛 ONN）说它与我的 Pi 配对。正确的 MAC 地址出现在列表中BluetoothAdapter.getDefaultAdapter().getBondedDevices()。
当我运行rfcomm-server.py示例脚本时，它最终会显示Accepted connection from ('B4:4B:D6:EE:A2:1C', 1).
但是mmSocket.connect()android-BluetoothChat 应用程序中的行因可怕的错误而失败java.io.IOException: read failed, socket might closed or timeout, read ret: -1。
invoke当我使用秘密方法时，我仍然没有连接createRfcommSocket()，StackOverflow 建议使用该方法来解决该错误。
那么接下来我应该尝试什么？
另一个问题：界面中的 UUID 是什么？服务器（Pi）是否需要匹配这个 UUID？我看不出 android-BluetoothChat 程序随机生成一个的原因。
这是一些日志，在任何人都必须要求之前：
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()