OpenCV的3.0.0 Android原生方法：org.opencv.core.Mat.n_Mat :(）.J

Question

我使用的是原生的Android opencv的3.0.0库为Xamarin.Android通过Android的Java绑定，图书馆 。
我做的还同样喜欢这样Tutorial，问题是，我得到这个例外

Native method not found: org.opencv.core.Mat.n_Mat:()J

我能做些什么来解决这个问题呢？任何帮助将不胜感激，谢谢！

主要活动我的源代码：

public class MainActivity : Activity 
    { 

     Mat m; 
     Mat grayM; 
     ImageView imageView; 
     public MainActivity() 
     { 
      if (!OpenCVLoader.InitDebug()) 
      { 
       System.Console.WriteLine("GG"); 
      } 

     } 

     protected override void OnCreate(Bundle bundle) 
     { 
      base.OnCreate(bundle); 

      SetContentView(Resource.Layout.Main); 

      Button button = FindViewById<Button>(Resource.Id.myButton); 
      ImageButton crop = FindViewById<ImageButton>(Resource.Id.crop); 
      crop.Visibility = ViewStates.Invisible; 
      imageView = FindViewById<ImageView>(Resource.Id.IMG); 

      if (IsThereAnAppToTakePictures()) 
      { 
       CreateDirectoryForPictures(); 

       button.Click += delegate 
        { 
         Intent intent = new Intent (MediaStore.ActionImageCapture); 
         App._file = new File (App._dir, String.Format("myPhoto_{0}.jpg", System.Guid.NewGuid())); 
         intent.PutExtra (MediaStore.ExtraOutput, Android.Net.Uri.FromFile (App._file)); 
         StartActivityForResult (intent, 0); 

         crop.Visibility = ViewStates.Visible; 
         // SetImg(); 
        }; 
      } 

      crop.Click += (sender, e) => 
       { 
        SetImg(); 
       }; 
     } 

     void SetImg() 
     { 

      using (Bitmap _img = BitmapFactory.DecodeFile(App._file.Path)) 
      { 
       if (_img != null) 
       { 
        m = new Mat(); 
        grayM = new Mat(); 
        Utils.BitmapToMat(_img, m); 
        Imgproc.CvtColor(m, grayM, Imgproc.ColorBgr2gray); 
        Imgproc.CvtColor(grayM, m, Imgproc.ColorGray2bgra); 
        using (Bitmap bit = Bitmap.CreateBitmap(m.Cols(), m.Rows(), Bitmap.Config.Argb8888)) 
        { 
         Utils.BitmapToMat(bit,m); 
         imageView.SetImageBitmap(bit); 

        } 

        m.Release(); 
        grayM.Release(); 
       } 
      } 
     } 

     protected override void OnActivityResult (int requestCode, Result resultCode, Intent data) 
     { 
      base.OnActivityResult (requestCode, resultCode, data); 

      // Make it available in the gallery 

      Intent mediaScanIntent = new Intent (Intent.ActionMediaScannerScanFile); 
      Android.Net.Uri contentUri = Android.Net.Uri.FromFile (App._file); 
      mediaScanIntent.SetData (contentUri); 
      SendBroadcast (mediaScanIntent); 
      imageView.SetImageBitmap(BitmapFactory.DecodeFile(contentUri.Path)); 

      // Dispose of the Java side bitmap. 
      GC.Collect(); 
     } 

     private void CreateDirectoryForPictures() 
     { 
      App._dir = new File (
       Android.OS.Environment.GetExternalStoragePublicDirectory (
        Android.OS.Environment.DirectoryPictures), "CameraAppDemo"); 
      if (!App._dir.Exists()) 
      { 
       App._dir.Mkdirs(); 
      } 
     } 

     private bool IsThereAnAppToTakePictures() 
     { 
      Intent intent = new Intent (MediaStore.ActionImageCapture); 
      IList<ResolveInfo> availableActivities = 
       PackageManager.QueryIntentActivities (intent, PackageInfoFlags.MatchDefaultOnly); 
      return availableActivities != null && availableActivities.Count > 0; 
     } 


    } 
    public static class App 
    { 
     public static File _file; 
     public static File _dir; 
     public static Bitmap bitmap; 
    } 
} 

而且登录异常的：

[MonoDroid] UNHANDLED EXCEPTION: [MonoDroid] Java.Lang.UnsatisfiedLinkError: Exception of type 'Java.Lang.UnsatisfiedLinkError' was thrown. [MonoDroid] at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() [0x0000b] in /Users/builder/data/lanes/2058/58099c53/source/mono/mcs/class/corlib/System.Runtime.ExceptionServices/ExceptionDispatchInfo.cs:61 [MonoDroid] at Android.Runtime.JNIEnv.CallNonvirtualVoidMethod (intptr,intptr,intptr,Android.Runtime.JValue*) [0x00084] in /Users/builder/data/lanes/2058/58099c53/source/monodroid/src/Mono.Android/src/Runtime/JNIEnv.g.cs:1029 [MonoDroid] at Android.Runtime.JNIEnv.FinishCreateInstance (intptr,intptr,intptr,Android.Runtime.JValue*) [0x0000b] in /Users/builder/data/lanes/2058/58099c53/source/monodroid/src/Mono.Android/src/Runtime/JNIEnv.cs:306 [MonoDroid] at Android.Runtime.JNIEnv.FinishCreateInstance (intptr,intptr,intptr,Android.Runtime.JValue[]) [0x0001d] in /Users/builder/data/lanes/2058/58099c53/source/monodroid/src/Mono.Android/src/Runtime/JNIEnv.cs:312 [MonoDroid] at Org.Opencv.Core.Mat..ctor() [0x000da] in

Answer 1

我试着做一些技巧与ILoaderCallbackInterface（实现）：

public class LoaderCallBackHelper: Java.Lang.Object,ILoaderCallbackInterface 
    { 
     public void OnManagerConnected(int p0) 
     { 
      switch (p0) 
      { 
       case LoaderCallbackInterface.Success: 
        System.Console.WriteLine("Succes"); 
        break; 
       default: 
        this.OnManagerConnected(p0); 
        break; 
      } 
     } 
     public void OnPackageInstall(int p0, IInstallCallbackInterface p1) 
     { 
      p1.Install(); 
      System.Console.WriteLine(p1.PackageName); 
     } 

然后像这样（在MainActivity）：

 ILoaderCallbackInterface t = new LoaderCallBackHelper(); 
public MainActivity() 
     { 
      if(OpenCVLoader.InitAsync(OpenCVLoader.OpencvVersion3000,this,t)) 
       { 
       System.Console.WriteLine("OK"); 
       } 
     } 

和没有运气。
然后我试图做其他招：

public class BaseLoaderHelper : BaseLoaderCallback 
    { 
     public BaseLoaderHelper(Context context):base(context) 
     { 
     } 
    } 

     BaseLoaderCallback _t = new BaseLoaderHelper(this); 
if(OpenCVLoader.InitAsync(OpenCVLoader.OpencvVersion3000,this,_t)) 
        { 
        System.Console.WriteLine("OK"); 
        } 
      } 

，一切都一样，再一次的OpenCV不会初始化！
所以我的解决方案是我下载的OpenCV版本2.4.11并重新安装到我的项目。现在所有工程罚款：

public MainActivity() 
     { 
      if (!OpenCVLoader.InitDebug()) 
      { 
       System.Console.WriteLine("Failed to INIT \n OpenCV Failure"); 
      } 
      else 
      { 
       System.Console.WriteLine("OpenCV INIT Succes"); 
      } 
     }