Open2.4.5 Android当我打电话时崩溃Mat

Question

这个问题现在让我疯狂了好几天。我正在尝试使用opencv android最新的软件包。一切都插入，我没有任何错误，直到我在Android上运行项目，这是它崩溃时。当我调用一个简单的代码时，Mat m = new Mat（）;该应用程序崩溃，我看到一些其他人有同样的问题，但不知何故，他们设法解决它，这里是我的代码，也许这是愚蠢的，我看不到！我真正需要的是矩阵库，我试过贾马和杰布拉斯，但他们工作到某一点，但他们也崩溃了，他们非常缓慢。

package com.ece.facerecog; 
import java.io.File; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.io.InputStream;' 
import java.util.Arrays; 

import org.opencv.android.BaseLoaderCallback; 
import org.opencv.android.LoaderCallbackInterface; 
import org.opencv.android.OpenCVLoader; 
    import org.opencv.core.Mat; 

import com.ece.facerecog.utils.UIHelper; 


//import org.jblas.DoubleMatrix; 


    //import Jama.Matrix; 
    import android.app.Activity; 
import android.content.Context; 
    import android.graphics.Bitmap; 
    import android.graphics.BitmapFactory; 
import android.graphics.Color; 
//import android.graphics.Matrix; 

    import android.os.Bundle; 
import android.os.Environment; 
import android.util.Log; 
import android.widget.GridView; 
import android.widget.ImageView; 
    import android.widget.TextView; 

    public class Face extends Activity { 
private Bitmap bitmap; 
private int f = Crop.k; 
private ImageView tv; 

    private static final String TAG     = "OCVSample::Activity"; 

private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) { 
    @Override 
    public void onManagerConnected(int status) { 
     switch (status) { 
      case LoaderCallbackInterface.SUCCESS: 
      { 
       Log.i(TAG, "OpenCV loaded successfully"); 

      } break; 
      default: 
      { 
       super.onManagerConnected(status); 
      } break; 
     } 
    } 
}; 
    // @Override 
    // public void onResume() 
    // { 
    //  super.onResume(); 
    //  OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_5, this,       k     mLoaderCallback); 
    // } 

private Bitmap ReadImage1(String fBitmap) { 
    String root = Environment.getExternalStorageDirectory().toString(); 
    File myDir = new File(root + "/preprocessed"); 
    File file = new File(myDir , fBitmap); //or any other format supported 
    UIHelper.displayText(this, R.id.textView1, file.toString()); 

    try { 
     BitmapFactory.Options options = new BitmapFactory.Options(); 
     options.inPreferredConfig = Bitmap.Config.ARGB_8888;   
     Bitmap bitmap =   `BitmapFactory.decodeFile(file.getAbsolutePath(),options); //This gets the image `  
     return bitmap; 

     } catch (Exception e) { 
       e.printStackTrace(); 
       UIHelper.displayText(this, R.id.textView1, "Doesn't exist"); 
     } 

     return bitmap; 
    } 



    @Override 
    public void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.face); 

Log.i(TAG, "Trying to load OpenCV library"); 
if (!OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_5, this, mLoaderCallback)) 
{ 
    Log.e(TAG, "Cannot connect to OpenCV Manager"); 
} 


ImageView tv = (ImageView) findViewById(R.id.imageView1); 
Bitmap bmp = ReadImage1("/Image-" + f+ ".jpg"); 
tv.setImageBitmap(bmp); 
Mat m = new Mat(); 

}}

`

这里的日志错误，

04-13 23:14:17.412: E/AndroidRuntime(12111): FATAL EXCEPTION: main 
04-13 23:14:17.412: E/AndroidRuntime(12111): java.lang.UnsatisfiedLinkError: Native method not found: org.opencv.core.Mat.n_Mat:()J 
04-13 23:14:17.412: E/AndroidRuntime(12111): at org.opencv.core.Mat.n_Mat(Native Method) 
04-13 23:14:17.412: E/AndroidRuntime(12111): at org.opencv.core.Mat.<init>(Mat.java:441) 
04-13 23:14:17.412: E/AndroidRuntime(12111): at com.ece.facerecog.Face.onCreate(Face.java:147) 
04-13 23:14:17.412: E/AndroidRuntime(12111): at android.app.Activity.performCreate(Activity.java:5104) 
04-13 23:14:17.412: E/AndroidRuntime(12111): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
04-13 23:14:17.412: E/AndroidRuntime(12111): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 
04-13 23:14:17.412: E/AndroidRuntime(12111): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
04-13 23:14:17.412: E/AndroidRuntime(12111): at android.app.ActivityThread.access$600(ActivityThread.java:141) 
04-13 23:14:17.412: E/AndroidRuntime(12111): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
04-13 23:14:17.412: E/AndroidRuntime(12111): at android.os.Handler.dispatchMessage(Handler.java:99) 
04-13 23:14:17.412: E/AndroidRuntime(12111): at android.os.Looper.loop(Looper.java:137) 
04-13 23:14:17.412: E/AndroidRuntime(12111): at android.app.ActivityThread.main(ActivityThread.java:5039) 
04-13 23:14:17.412: E/AndroidRuntime(12111): at java.lang.reflect.Method.invokeNative(Native Method) 
04-13 23:14:17.412: E/AndroidRuntime(12111): at java.lang.reflect.Method.invoke(Method.java:511) 
04-13 23:14:17.412: E/AndroidRuntime(12111): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
04-13 23:14:17.412: E/AndroidRuntime(12111): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
04-13 23:14:17.412: E/AndroidRuntime(12111): at dalvik.system.NativeStart.main(Native Method) 

谢谢你帮我出去！

Answer 1

OpenCV的功能，如Mat必须调用thread或AsyncTask，我想。没有帮助，我面临AGES的同样问题。

为了避免崩溃，您可以声明Mat m作为全局变量，并在OpenCV的AsyncInitialization块中初始化它。

事情是这样的：

public class Face extends Activity { 
private Bitmap bitmap; 
private int f = Crop.k; 
private ImageView tv; 
Mat m; 
private static final String TAG     = "OCVSample::Activity"; 

    private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) { 
@Override 
public void onManagerConnected(int status) { 
    switch (status) { 
     case LoaderCallbackInterface.SUCCESS: 
     { 
      Log.i(TAG, "OpenCV loaded successfully"); 
      m=new Mat(); 
     } break; 
     default: 
     { 
      super.onManagerConnected(status); 
     } break; 
    } 
} 
}; 

如果它仍然崩溃，我会建议你执行你在AsyncTask在我project试图像什么功能。但是，可以声明Mat函数，而不会有OpenCV函数中的UnsatisfiedLinkError异常的风险。然而，在UI中调用的函数会遇到这种情况至少这是我见过的。

Answer 2

我刚刚遇到同样的问题，发现了另一个解决方案：
您可以使用其他活动来调用您的活动（“面部”），就像使用启动活动的按钮的某个介绍屏幕一样。如果您在此介绍活动中初始化OpenCV（与您在活动中做的方式相同），则可以在下次活动中使用OpenCV函数，而不会有任何问题...

这样您就不必将OpenCV变量声明为全局变量并在OpenCV的AsyncInitialization块中初始化它们。