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jeremy-ellis-tech / Xamarin.Android.OpenCV

C# bindings for the OpenCV Android SDK
MIT License
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Java.Lang.UnsatisfiedLinkError #3

Closed CeadeS closed 8 years ago

CeadeS commented 8 years ago

Hey, i get an odd Exception when adding a Line at Line 47 of ColorBlobDetectionActivity.cs :Mat foo = new Mat() at other places there is no Problem with the constructor, except here. i do not get it.

`04-22 15:05:19.774 I/ColorBlobDetection( 5060): Instantiated new OpenCV.SDKDemo.ColorBlobDetection.ColorBlobDetectionActivity 04-22 15:05:19.789 W/dalvikvm( 5060): No implementation found for native Lorg/opencv/core/Mat;.n_Mat:(III)J Unhandled Exception:

Java.Lang.UnsatisfiedLinkError: Native method not found: org.opencv.core.Mat.n_Mat:(III)J`

jeremy-ellis-tech commented 8 years ago

Hi @CeadeS,

Is this running the SDK demo with no other changes, or in your own program?

jeremy-ellis-tech commented 8 years ago

I quick google led me to this stackoverflow answer

I'm assuming it isn't finding the libopencv_core.a library. It could be that the correct .a file isn't included in the generated .dll, maybe due to the build configuration not matching your phone's architecture (arm, x86, etc...)

CeadeS commented 8 years ago

Okay, thanks for that, ill try as soon as i have my computer back ;) This exception is thrown in the SDK Demo after i tried similar code at my project. I wanted to test if i altered something that made this happen. The Code runs on 2 different phones with exactly the same behaviour. If it does not find the core library object file, the other code would throw the same exception i guess. I try next what happenes when i use other functions and classes inside the core object. Everything else seems to build and rebuild just fine.

CeadeS commented 8 years ago

okay, sry my fault... never use library before loading it

jeremy-ellis-tech commented 8 years ago

No problem. Thanks for letting me know it's sorted.