mobile compatibility (Similar to issue #37)

[SimonIgnat]

Hi Miguel,

I'm trying to get a reference to TensorFlowSharp in my Xamarin mobile development but I'm experiencing some issues.

The problem is that TensorFlowSharp doesn't build when targeting MONO / .NET 4.5, which is necessary to reference it in the mobile project.

Build error arises at line 675 since MemoryCopy was first introduced in .NET 4.6
Buffer.MemoryCopy ((void*)src, target, size, size);

Do you know any workaround to this?

Best regards,
Simon

[migueldeicaza]

You would need to rebuild the library for mobile. I have not done any work in that area, you will likely just have to replicate the .csproj that I have for desktop.

[DumDumin]

Hi guys,

I am trying to use TensorFlowSharp in a Xamarin.Android application, but I am having trouble getting it done.

• First of all I got it running in a .net 4.6.1 application with the nuget package. So the basic setup work :)
• Next step I tried was just adding the nuget package to the Xamarin.Android project, but the TensorFlowSharp.dll was not added to the references. Like you mentioned in the README, because its no .net 4.6.1 project probably...
• Then I just added the reference by myself :D and got an DLLNotFoundException on runtime (sadly there is no more info than that statement)
• Next, I rebuild your API in a Xamarin.Android Classlibrary (like miguel suggested in Xamarin mobile compatibility #37), but it ends up in the same exception...

=> I hope you guys can give me a hint on what I am missing (Or what my false assumption are). Do I have to get a different file for the "libtensorflow"? Your nuget package provides a .dll a .dylib and a .so file. My knowledge so far is, that the .so file can be used by android as a library.

[gmlwns2000]

I tried to run TensorFlowSharp on Xamarin.Forms application, too.
So I ported project already for Xamarin.

As far as I know, to use .so files on Xamarin.Android you should add .so files on Xamarin.Android project as EmbadedNativeLibrary or AndroidNativeLibrary
Xamarin Manual: Using Native Bindings

And this is my work.
https://github.com/gmlwns2000/TensorFlowSharp

I hope this will help you.
And also, if guys find some wrong in my work, please give me some advice!

[ghost]

This is kind of going against how this project is evolving but I thought I'd mention it anyway.

Tensorflow has a single Java class file that can be called to interact with Tensorflow on Android. A Jar (containing this class file) and required native binaries for Android (.so) can be found here, for instance. You can then actually create a Xamarin Android bindings library against this Jar (making sure to include the native binaries for each architecture) and then call it from C# in Xamarin.Android. I have done this successfully in another project. Would creating an idiomatic Bindings library for Tensorflow Mobile (Android at least) be something you'd be interested in @migueldeicaza ?