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Android Support

We have brand new support on Android as of February 2013. It of course is compiled using Xamarin's MonoDroid toolset.

There is support for Radio, DeviceInfo, Client.Connect, sending and receiving data, Discovering known devices, and Listener. It has been tested on a Nexus 7 and a Samsung Tab 2 7.0 device.

The library project file is in ...\ITH.Net.Android\ The current library project file targets version 2.3, i.e. API Level 10, see below. There is a solution file at ...\AndroidAaaa\

Test tool

A version of my cross-platform testing app has been created in ...\Testing\AndroidMenuTesting\ and the ~140 commands are displayed in the AppBar menu system. Press your device menu button to open that, on most devices with the vertical three dots at bottom-right. A few buttons provide shortcuts GetAllRadios, GetDeviceInfo, FlagsDiscover, Connect-SimpleClosingFirst, and Listen. See the screenshot below.

Android Permissions
"Note: Most methods require the BLUETOOTH permission and some also require the BLUETOOTH_ADMIN permission"
We also need permission INTERNET because we use NetworkStream. If that becomes a problem we can maybe look at a workaround.


Things not supported include:
  • Radio: Class of Device, versions, setting mode.
  • DeviceInfo: Setting name, LastUsed, Connected, versions, GetServiceRecords, SetServiceState, and InstalledServices.
  • Client.Connect: Available, DataAvailable, Connected, Client, LingerState, and LinkKey/Policy.
  • Discovery Devices:
  • Listener: Publishing custom Service Records, listening on a specific port number, and setting Service Class bits, LocalEndPoint is blank, and Pending. (Setting Service Name is supported.)
  • Security: No support.

Android API Level

We've used only functions from Android API Level 10, i.e. GINGERBREAD_MR1. We lose BluetoothSocket.isConnected by not using Level 14, which affects BluetoothClient.Connected. (We could probably get down to Level 5, if using createInsecureRfcommSocketToServiceRecord and listenUsingInsecureRfcommWithServiceRecord weren't required).

To Do

  1. DONE. Support Device Discovery. So change AndroidBthClient to be a subclass of CommonDiscoveryBluetoothClient, create and register an Android BroadcastReceiver in AndroidBthInquiry which calls back whenever a device-found event occurs. That will provide support for both in-range and live discovery.
  2. DONE Check what Finalizers are required. Listener, and BluetoothClient/Stream.
  3. Provide socket errors. Currently we'll just pass any Mono-Android exceptions.
  4. Add Android to Feature support table page.



Define Use
ANDROID Compiling to target the Mono Android platform -- not to do with Bluetooth API
ANDROID_BTH Include the 32feet.NET support for Bluetooth using the Android Bluetooth API
FAKE_ANDROID_BTH_API Include the Mock Android Bluetooth API classes

NO_WINFORMS Exclude any WinForms usage, needed for instance when targeting Android
NO_WIDCOMM Hide special case Widcomm dependency checking in BluetoothFactory
NO_MSFT Hide code in e.g. BluetoothWin32Authentication referencing MSFT Bluetooth structs etc

For real use compiling for Android

As used by the preliminary project ITH.Net.Android.csproj
For running in the emulator add the FAKE_ANDROID_BTH_API define, which allows Radio, Devices, and Discovery currently.

For test on desktop Windows (project file FX2)

Do not reference the Mono.Android.dll. This includes Mocking of the Android API.

For -- useless?? -- compile on desktop Windows (project file FX2)

Add reference to Mono.Android.dll, along with

The latter is required since System.Drawing.Size is also included in the Mono.Android.dll and so conflicts with that from the FCL's System.Drawing.dll.

AndroidMenuTesting screenshot


Last edited Mar 8, 2013 at 9:56 AM by alanjmcf, version 47