NoClassDefFoundError et ClassNotFoundException sur la bibliothèque JavaCV

Question

J'essaie d'utiliser JavaCV dans Android Studio, mais chaque fois que j'essayé d'utiliser la bibliothèque et l'exécuter, il se bloque et logcat montre cette erreur ..

01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime: FATAL 

EXCEPTION: main 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime: java.lang.NoClassDefFoundError: java.lang.ClassNotFoundException: org.bytedeco.javacpp.opencv_core 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at org.bytedeco.javacpp.Loader.load(Loader.java:392) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at org.bytedeco.javacpp.Loader.load(Loader.java:358) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at org.bytedeco.javacpp.opencv_imgcodecs.<clinit>(opencv_imgcodecs.java:13) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at com.example.user.dmr.MainActivity.onCreate(MainActivity.java:20) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at android.app.Activity.performCreate(Activity.java:5122) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1084) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2307) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2395) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at android.app.ActivityThread.access$600(ActivityThread.java:162) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1364) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at android.os.Handler.dispatchMessage(Handler.java:107) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at android.os.Looper.loop(Looper.java:194) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at android.app.ActivityThread.main(ActivityThread.java:5392) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at java.lang.reflect.Method.invokeNative(Native Method) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at java.lang.reflect.Method.invoke(Method.java:525) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at dalvik.system.NativeStart.main(Native Method) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime: Caused by: java.lang.ClassNotFoundException: org.bytedeco.javacpp.opencv_core 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at java.lang.Class.classForName(Native Method) 
01-03 09:16:32.242 15233-15233/com.example.user.dmr E/AndroidRuntime:  at java.lang.Class.forName(Class.java:217) 

Cette est le code java dans le studio Android que je suis en train de courir:

package com.example.user.dmr; 

import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.widget.TextView; 

import static org.bytedeco.javacpp.opencv_core.*; 
import static org.bytedeco.javacpp.opencv_imgcodecs.cvLoadImage; 


public class MainActivity extends AppCompatActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     TextView v = (TextView) findViewById(R.id.textview1); 

     IplImage image = cvLoadImage("drawable/face1.JPG"); //crashes when it read this line 

     if (image == null) { 
      v.setText("Fail"); 
     } else { 
      v.setText("Succeed"); 
     } 
    } 
} 

Je l'ai déjà ajouté la bibliothèque javacv dans les bibliothèques externes. Ce sont les dépendances que j'ai ajoutées dans build.gradle.

dependencies { 
compile fileTree(include: ['*.jar'], dir: 'libs') 
compile group: 'org.bytedeco', name: 'javacv', version: '1.0' 
} 

Une idée de ce qui se passe et comment le réparer? Merci.

Answer 1

Je pense que vous avez également besoin de javacpp-presets.

Essayez ceci dans vos dépendances Gradle:

compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.0.0' + '-1.0' 

compile group: 'org.bytedeco', name: 'javacv', version: '1.0'