找不到原生方法org.opencv.core.mat.n_mat-Android

Question

我在处理Mat时遵循了所有步骤，包括在调用时将其添加到AsyncTask中，但仍然是原始方法未找到的相同错误org.opencv.core。 mat.n_mat

下面的代码：

package com.example.myfirstapp; 

import java.io.ByteArrayOutputStream; 
import java.io.FileNotFoundException; 
import java.util.ArrayList; 
import org.json.JSONException; 
import org.json.JSONObject; 
import org.opencv.android.BaseLoaderCallback; 
import org.opencv.android.LoaderCallbackInterface; 
import org.opencv.android.OpenCVLoader; 
import org.opencv.android.Utils; 
import org.opencv.core.Mat; 

import com.example.myfirstapp.RegisterMarkerMain.ProcessImage; 

import android.location.Criteria; 
import android.location.Location; 
import android.location.LocationListener; 
import android.location.LocationManager; 
import android.net.Uri; 
import android.os.AsyncTask; 
import android.os.Build; 
import android.os.Bundle; 
import android.annotation.SuppressLint; 
import android.app.Activity; 
import android.app.AlertDialog; 
import android.app.ListActivity; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.content.Intent; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.drawable.BitmapDrawable; 
import android.util.Base64; 
import android.util.Log; 
import android.view.ContextMenu; 
import android.view.KeyEvent; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.ImageView; 
import android.widget.LinearLayout; 
import android.widget.ListView; 
import android.widget.ProgressBar; 
import android.widget.RelativeLayout; 
import android.widget.Spinner; 
import android.widget.TextView; 
import android.widget.Toast; 
import android.widget.AdapterView.OnItemSelectedListener; 

public class CreateApp extends ListActivity { 

    boolean duplicate = false; 
    String userID = ""; 
    Intent manage; 
    String image = ""; 
    Intent refresh; 
    CandidatesListAdapter adapter; 
    ProcessImage process; 
    Mat mRgba; 
    private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) { 
     @Override 
     public void onManagerConnected(int status) { 
      Log.i("loading libs", "OpenCV loading status " + status); 
      switch (status) { 
      case LoaderCallbackInterface.SUCCESS: { 
       Log.i("loading libs", "OpenCV loaded successfully"); 

       // Load native library after(!) OpenCV initialization 
       System.loadLibrary("native_sample"); 

      } 
       break; 
      default: { 
       super.onManagerConnected(status); 
      } 
       break; 
      } 
     } 
    }; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_create_app); 
     manage = new Intent(this, ManageApps.class); 
     concurrentTasks(); 
     Bundle extras = getIntent().getExtras(); 
     if (extras != null) { 
      userID = extras.getString("user_id"); 
      Toast.makeText(CreateApp.this, "User id " + userID, 
        Toast.LENGTH_LONG).show(); 

     } 
     final Spinner spinner = (Spinner) findViewById(R.id.categories_spinner); 
     refresh = new Intent(this, ManageApps.class); 
     ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
       this, R.array.categories_array, 
       android.R.layout.simple_spinner_item); 
     adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
     spinner.setAdapter(adapter); 

     spinner.setOnItemSelectedListener(new OnItemSelectedListener() { 
      @Override 
      public void onItemSelected(AdapterView<?> parentView, 
        View selectedItemView, int position, long id) { 
       // your code here 
       String category = spinner.getSelectedItem().toString(); 

       Toast.makeText(CreateApp.this, 
         "Category " + category + " selected", 
         Toast.LENGTH_SHORT).show(); 
       TextView tv = (TextView) findViewById(R.id.question_title); 
       tv.setText(category); 

      } 

      @Override 
      public void onNothingSelected(AdapterView<?> parentView) { 
       // your code here 
      } 

     }); 

     ImageView iv = (ImageView) findViewById(R.id.application_logo); 
     registerForContextMenu(iv); 
     iv.setOnLongClickListener(new View.OnLongClickListener() { 
      @Override 
      public boolean onLongClick(View arg0) { 
       // TODO Auto-generated method stub 
       return false; 
      } 
     }); 

     iv.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       Toast.makeText(CreateApp.this, "Long click to add image", 
         Toast.LENGTH_LONG).show(); 
      } 
     }); 

     Button submit = (Button) findViewById(R.id.submit); 
     submit.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View arg0) { 
       // TODO Auto-generated method stub 
       EditText et = (EditText) findViewById(R.id.application_name_edit); 
       if (et.getText().toString().equals(null) 
         || et.getText().toString().equals("")) { 
        Toast.makeText(CreateApp.this, 
          "App Name can not be empty.", Toast.LENGTH_SHORT) 
          .show(); 
       } else { 
        if (spinner.getSelectedItem().toString().equals("Select") 
          || spinner.getSelectedItem().toString().equals("")) { 
         Toast.makeText(CreateApp.this, 
           "Cateory must be selected.", Toast.LENGTH_SHORT) 
           .show(); 
        } else { 
         new AsyncAppDuplicates().execute(); 
         try { 
          Thread.sleep(500); 
         } catch (InterruptedException e) { 
          // TODO Auto-generated catch block 
          e.printStackTrace(); 
         } 
         if (duplicate == true) { 
          System.out 
            .println("Duplicate flag for App Creation inside if " 
              + duplicate); 
          AlertDialog.Builder builder = new AlertDialog.Builder(
            CreateApp.this); 
          builder.setTitle("Warning"); 
          builder.setMessage("An application already exists with this name." 
            + "\n" + "Please choose a different name."); 
          builder.setNegativeButton("Ok", 
            new DialogInterface.OnClickListener() { 
             public void onClick(
               DialogInterface dialog, int id) { 
              // if this button is clicked, just 
              // close 
              // the dialog box and do nothing 
              dialog.cancel(); 
             } 
            }); 
          builder.show(); 
         } else { 
          concurrentCreate(); 
          Toast.makeText(CreateApp.this, 
            "Created Successfully", Toast.LENGTH_SHORT) 
            .show(); 
          System.out.println("Done"); 
          // EditText app = (EditText) 
          // findViewById(R.id.application_name_edit); 

         } 
        } 
       } 
      } 
     }); 

    } 

    @SuppressLint("NewApi") 
    private void concurrentTasks() { 
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { 
      new AsyncGetCategories() 
        .executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); 

      System.out.println("getting categories"); 
     } else { 
      new AsyncGetCategories().execute(); 
     } 
    } 

    @SuppressLint("NewApi") 
    private void concurrentCreate() { 
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { 
      new AsyncCreateApplication() 
        .executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); 

      System.out.println("Creating app"); 
     } else { 
      new AsyncCreateApplication().execute(); 
     } 
    } 

    @Override 
    public boolean onKeyDown(int keyCode, KeyEvent event) { 
     if ((keyCode == KeyEvent.KEYCODE_BACK)) { 
      finish(); 
      manage.putExtra("user_id", userID); 
      startActivity(manage); 
     } 
     return super.onKeyDown(keyCode, event); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.create_app, menu); 
     return true; 
    } 

    public void onCreateContextMenu(ContextMenu menu, View v, 
      ContextMenu.ContextMenuInfo menuInfo) { 
     super.onCreateContextMenu(menu, v, menuInfo); 
     getMenuInflater().inflate(R.menu.contextmenu, menu); 
     menu.setHeaderTitle("Select an Option"); 
    } 


    @Override 
    public boolean onContextItemSelected(MenuItem item) { 
     switch (item.getItemId()) { 
     case R.id.menu_take: 
      Toast.makeText(CreateApp.this, "Opening the Camera", 
        Toast.LENGTH_SHORT).show(); 
      Intent camera = new Intent(
        android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
      startActivityForResult(camera, 0); 
      return true; 

     case R.id.menu_choose: 
      Toast.makeText(CreateApp.this, "Opening the Gallery", 
        Toast.LENGTH_SHORT).show(); 
      Intent gallery = new Intent(); 
      gallery.setType("image/*"); 
      gallery.setAction(Intent.ACTION_GET_CONTENT); 
      startActivityForResult(
        Intent.createChooser(gallery, "Select Picture"), 1); 
      return true; 
     } 
     return super.onContextItemSelected(item); 
    } 

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     ImageView iv = new ImageView(this); 

     switch (requestCode) { 
     case 0: 
      if (resultCode == RESULT_OK) { 
       // Uri selectedImage = data.getData(); 
       Toast.makeText(this, "Adding Photo From Camera", 
         Toast.LENGTH_LONG).show(); 
       iv = (ImageView) findViewById(R.id.application_logo); 
       Bitmap thumbnail = (Bitmap) data.getExtras().get("data"); 
       iv.setImageBitmap(thumbnail); 
       Intent r = new Intent(this, RegisterMarkerMain.class); 
       //startActivity(r); 

       ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
       thumbnail.compress(Bitmap.CompressFormat.PNG, 100, baos); 
       byte[] b = baos.toByteArray(); 
       image = Base64.encodeToString(b, Base64.DEFAULT); 
       //r.putExtra("BitmapImage", image); 
       //startActivityForResult(r, 13); 
       Toast.makeText(this, "Marker Valid", Toast.LENGTH_LONG).show(); 
       adapter = new CandidatesListAdapter(this); 
       setListAdapter(adapter); 

       process = new ProcessImage(this, thumbnail); 
       process.execute(); 
       //call the main layout from xml 
       //RelativeLayout mainLayout = (RelativeLayout)findViewById(R.id.create_layout_id); 

       //create a view to inflate the layout_item (the xml with the textView created before) 
       //View view = getLayoutInflater().inflate(R.layout.layout_item, mainLayout,false); 

       //add the view to the main layout 
       // mainLayout.addView(view); 
      } 

      break; 
     case 1: 
      if (resultCode == RESULT_OK) { 
       Toast.makeText(this, "Adding Photo From Gallery", 
         Toast.LENGTH_LONG).show(); 
       Uri targetUri = data.getData(); 
       iv = (ImageView) findViewById(R.id.application_logo); 
       Bitmap thumbnail = null; 
       try { 
        thumbnail = BitmapFactory.decodeStream(getContentResolver() 
          .openInputStream(targetUri)); 
       } catch (FileNotFoundException e) { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
       } 
       iv.setImageBitmap(thumbnail); 
       ByteArrayOutputStream baos=new ByteArrayOutputStream(); 
       thumbnail.compress(Bitmap.CompressFormat.JPEG,100, baos); 
       byte [] b=baos.toByteArray();; 
       try{ 
       System.gc(); 
       image=Base64.encodeToString(b, Base64.DEFAULT); 
       }catch(Exception e){ 
        e.printStackTrace(); 
       }catch(OutOfMemoryError e){ 
        baos=new ByteArrayOutputStream(); 
        thumbnail.compress(Bitmap.CompressFormat.JPEG,50, baos); 
        b=baos.toByteArray(); 
        image=Base64.encodeToString(b, Base64.DEFAULT); 
        Log.e("EWN", "Out of memory error catched"); 
       } 
       Toast.makeText(this, "Marker Valid", Toast.LENGTH_LONG).show(); 
      } 
      break; 
     } 

    } 

    public void managePrivacy(View v) { 
     Intent privacyIntent = new Intent(this, ManagePrivactActivity.class); 
     startActivity(privacyIntent); 
    } 

    protected void onListItemClick(ListView l, View v, int position, long id) { 
     super.onListItemClick(l, v, position, id); 
     Marker o = (Marker) this.getListAdapter().getItem(position); 
     Toast.makeText(this, "strength " + o.descriptor.rows(), 
       Toast.LENGTH_SHORT).show(); 
     // TODO: both Image and descriptor should be sent to server combined 
     // with location and other info. 
     // Descriptor of image is n rows * 64 numbers 
    } 

    public native void loadCand(long nativeObjAddr, long descriptoradd, int i); 

    public native int findMarkersNative(long imgAdd); 

    public class ProcessImage extends AsyncTask<Void, Void, ArrayList<Marker>> { 


     private Context mContext; 
     Bitmap bmp; 

     public ProcessImage(Context context, Bitmap bmp) { 
      mContext = context; 
      mRgba = new Mat(); 
      this.bmp = bmp; 

     } 

     @Override 
     protected void onPreExecute() { 
      super.onPreExecute(); 
      getListView().setVisibility(View.GONE); 
      //loading.setVisibility(View.VISIBLE); 

      Utils.bitmapToMat(bmp, mRgba); 

     } 

     @Override 
     protected void onPostExecute(ArrayList<Marker> result) { 
      getListView().setVisibility(View.VISIBLE); 
      //loading.setVisibility(View.GONE); 
      adapter.updateData(result); 
      // display 

      Utils.matToBitmap(mRgba, bmp); 

      //imageView.setImageBitmap(bmp); 
      super.onPostExecute(result); 

     } 

     @Override 
     protected ArrayList<Marker> doInBackground(Void... params) { 
      ArrayList<Marker> imagesCand = new ArrayList<Marker>(); 
      // process 
      int candCount = findMarkersNative(mRgba.getNativeObjAddr()); 

      for (int i = 0; i < candCount; i++) { 
       Mat cand = new Mat(); 
       Mat descriptor = new Mat(); 

       loadCand(cand.getNativeObjAddr(), 
         descriptor.getNativeObjAddr(), i); 
       if (descriptor.rows() > 0) { 
        Bitmap bmp3 = Bitmap.createBitmap(cand.cols(), cand.rows(), 
          Bitmap.Config.ARGB_8888); 
        Utils.matToBitmap(cand, bmp3); 
        imagesCand.add(new Marker(bmp3, descriptor)); 
       } 
      } 
      return imagesCand; 
     } 

    } 

    private class AsyncCreateApplication extends AsyncTask<String, Void, Void> { 
     @Override 
     protected Void doInBackground(String... arg0) { 
      EditText et = (EditText) findViewById(R.id.application_name_edit); 
      String s = et.getText().toString(); 
      TextView tv = (TextView) findViewById(R.id.question_title); 
      String c = tv.getText().toString(); 
      System.out.println("Category yafanan " + c); 
      ServerAPI.createApplication(s, c, userID, image); 
      System.out.println("in Background"); 
      return null; 
     } 

     protected void onPostExecute(Void result) { 
      EditText et = (EditText) findViewById(R.id.application_name_edit); 
      refresh.putExtra("app_name", et.getText().toString()); 
      System.out.println("App created " + et.getText().toString()); 
      refresh.putExtra("user_id", userID); 
      setResult(RESULT_OK, refresh); 
      // startActivity(edit); 
      startActivity(refresh); 
     } 

    } 

    private class AsyncGetCategories extends AsyncTask<Void, Void, Void> { 

     ArrayList<String> al = null; 
     ArrayAdapter<String> dataAdapter; 
     Spinner category = (Spinner) findViewById(R.id.categories_spinner); 

     @Override 
     protected Void doInBackground(Void... params) { 
      System.out.println("do in background"); 
      al = ServerAPI.getCategories(); 
      System.out.println("ArrayList fetched"); 
      return null; 
     } 

     @Override 
     protected void onPostExecute(Void result) { 
      dataAdapter = new ArrayAdapter<String>(CreateApp.this, 
        android.R.layout.simple_spinner_item, 
        new ArrayList<String>()); 
      dataAdapter 
        .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
      category.setAdapter(dataAdapter); 
      dataAdapter.add("Select"); 
      for (int i = 0; i < al.size(); i++) { 
       dataAdapter.add(al.get(i)); 
       // System.out.println(al.remove(i)); 
      } 

      return; 
     } 

    } 

    private class AsyncAppDuplicates extends AsyncTask<String, Void, Void> { 

     @Override 
     protected Void doInBackground(String... arg0) { 
      EditText et = (EditText) findViewById(R.id.application_name_edit); 
      String name = et.getText().toString(); 

      String s = ServerAPI.checkAppDuplicates(name, userID); 
      System.out.println("Checked and " + s); 
      if (s.equals("Already there")) { 
       duplicate = true; 
      } else { 
       duplicate = false; 
      } 
      return null; 
     } 

    } 

} 

我GOOGLE了这么多，但我无法弄清楚什么是错的。 任何帮助将非常感激。

Answer 1

确认您的native_sample.so文件已包含在您的libs - armeabi文件夹中，并且通常应该将本机lib加载到活动生命周期方法之外的静态代码块中。

Answer 2

我解决它写在那里，你的活动宣告一切以下行，的onCreate前：

static { 
    if (!OpenCVLoader.initDebug()) { 
     // Handle initialization error 
    } 
}