找不到 OpenCV 3.0.0 Android 本机方法:org.opencv.core.Mat.n_Mat:()J [英] OpenCV 3.0.0 Android native method not found: org.opencv.core.Mat.n_Mat:()J
问题描述
我正在通过 Android Java 绑定库 为 Xamarin.Android 使用原生 android Opencv 3.0.0 库.
我正在做同样的教程和问题是我得到了这个例外
I'm using native android Opencv 3.0.0 library for Xamarin.Android via Android Java Bindings Library .
I'm doing pretty same like this Tutorial and the problem is that i got this exception
未找到本机方法:org.opencv.core.Mat.n_Mat:()J
Native method not found: org.opencv.core.Mat.n_Mat:()J
我该怎么做才能解决这个问题?任何帮助将不胜感激,谢谢!
What can i do to resolve this problem? Any help will be appreciated,thanks!
我的主要活动的源代码:
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;
}
}
和日志异常:
[MonoDroid] 未处理的异常:[MonoDroid]Java.Lang.UnsatisfiedLinkError:类型异常'Java.Lang.UnsatisfiedLinkError' 被抛出.[MonoDroid] 在System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()[0x0000b] 在/Users/builder/data/lanes/2058/58099c53/source/mono/mcs/class/corlib/System.Runtime.ExceptionServices/ExceptionDispatchInfo.cs:61[MonoDroid] 在 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] 在 Android.Runtime.JNIEnv.FinishCreateInstance(intptr,intptr,intptr,Android.Runtime.JValue*) [0x0000b] 在/Users/builder/data/lanes/2058/58099c53/source/monodroid/src/Mono.Android/src/Runtime/JNIEnv.cs:306[MonoDroid] 在 Android.Runtime.JNIEnv.FinishCreateInstance(intptr,intptr,intptr,Android.Runtime.JValue[]) [0x0001d] 在/Users/builder/data/lanes/2058/58099c53/source/monodroid/src/Mono.Android/src/Runtime/JNIEnv.cs:312[MonoDroid] 在 Org.Opencv.Core.Mat..ctor () [0x000da] 中
[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
推荐答案
我尝试用 ILoaderCallbackInterface 做一些小技巧(实现):
I tried to do some tricks with ILoaderCallbackInterface(implementation) :
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);
}
然后是这样的(在 MainActivity 上):
Then something like this(on MainActivity):
ILoaderCallbackInterface t = new LoaderCallBackHelper();
public MainActivity()
{
if(OpenCVLoader.InitAsync(OpenCVLoader.OpencvVersion3000,this,t))
{
System.Console.WriteLine("OK");
}
}
没有运气.
然后我尝试做其他技巧:
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,再次 OpenCV 不会初始化!
所以我的解决方案是我下载了 OpenCV 版本 2.4.11 并重新安装到我的项目中.现在一切正常:
And all was same,again OpenCV won't to initialise !
So my solution was that i downloaded OpenCV version 2.4.11 and reinstalled to my project. Now all works fines:
public MainActivity()
{
if (!OpenCVLoader.InitDebug())
{
System.Console.WriteLine("Failed to INIT \n OpenCV Failure");
}
else
{
System.Console.WriteLine("OpenCV INIT Succes");
}
}
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