English · November 28, 2021

What Is The Native Method For The Unsatisfied Link Error That Opencv Cannot Find, And How To Fix It?

Over the past week, some users have reported to us that they have encountered unsatisfied link errors, native method not found opencv.

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    I am creating an Android project with OpenCV. Some of the methods don’t have a Java version, so I have the option to use the NDK to use elements in my project.

    This is my initial time using the NDK, so after rooting a few examples, I wrote a little code, ran it on my engine, and got the following error message:

      07-04 10:26: 19.555 21270-21270 / com.example.MyTest E / AndroidRuntime • • EXCEPTION FATAL: main    java.lang.UnsatisfiedLinkError: Undoubtedly found native method: com.example.MyTest.JNIlib.readImg :() I           Under com.example.MyTest.JNIlib.Method) readimg (native from com.example.MyTest.MyActivity $ 2.onClick (MyActivity.java:60)            Worried about android.view.View.performClick (View.java:4211)            available at android.view.View $ PerformClick.run (View.java:17267)            at android.os.Handler.handleCallback (Handler.java:615)            android at.os.Handler.dispatchMessage (Handler.java:92)            at android.os.Looper.loop (Looper.java:137)            next to android.app.ActivityThread.main (ActivityThread.java:4898)           At java.lang.reflect.Method.invokeNative (native method)           at java.lang.reflect.Method.invoke (Method.java:511)            under com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run (ZygoteInit.java:1006)            under com.android.internal.os.ZygoteInit.main (ZygoteInit.java:773)           At dalvik.system.NativeStart.main (native method) 

    I have regenerated the .so files n How many times and checked the names of the functions under consideration jni. I also applied extern “C” ‘to jni wrapper functions. But hardly any of these solutions will work.

    Note. I am still using Intellij Idea for developing JAVA Dark programs. I could make a lot of lucky mistakes. lol

      #include #include #include #include #include #include #include #include #include "LocalFeature.h"Using the cv namespace;Using the std namespace;readImg () interval      / * deliver something * /    Returns 0;  // JNI operations, note the naming.External "C"    Jint jniexport JNICALL Java_com_example_MyTest_JNIlib_readImg (JNIEnv * env, jobject obj);;Jint jniexport JNICALL Java_com_example_MyTest_JNIlib_readImg (JNIEnv * env, job object)    return (jint) readImg (); 

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  • LocalFeatures.h and LocalFeatures.cpp don’t show up, but I’m pretty sure that’s not the problem.

      LOCAL_PATH: = $ (call my-dir)Include $ (CLEAR_VARS)LOCAL_MODULE: = nonfree_prebuiltLOCAL_SRC_FILES: = libnonfree.soInclude $ (PREBUILT_SHARED_LIBRARY)Include $ (CLEAR_VARS)LOCAL_MODULE: = opencv_java_prebuiltLOCAL_SRC_FILES Libopencv_java: =. SoInclude $ (PREBUILT_SHARED_LIBRARY)Include $ (CLEAR_VARS)# Change LOCAL_C_INCLUDES toyour way to OpenCV to get Android.LOCAL_C_INCLUDES: = E: /Java/libs/OpenCV-2.4.9-android-sdk/sdk/native/jni/includeLOCAL_MODULE: matches mytest_libLOCAL_CFLAGS: = -Werror -O3-fast-mathLOCAL_LDLIBS + = -ldl -llogLOCAL_SHARED_LIBRARIES: = nonfree_prebuilt opencv_java_prebuiltLOCAL_SRC_FILES: = LocalMain.cpp nLocalFeature.h nLocalFeature.cppInclude $ (BUILD_SHARED_LIBRARY) 

    unsatisfiedlinkerror native method not found opencv

    These readme .cpp and .mk files make up a powerful Eclipse project. libmytest_lib.so, libopencv_java.so, libnonfree.so can be generated correctly.The files immediately after the .java are in the Intellij Idea project. .I AM. Copied the .the these people … so files in In lib like the Idea project.

      public JNIlib class    static            Try                    // Load the required libraries.            System.loadLibrary ("opencv_java");            System.loadLibrary ("not free");            System.loadLibrary ("mytest_lib");                catch (E unsatisfied link error)                    System.err.println ("Error in native HTML code library.  N");                Native static client int readImg (); 

    Public class

      MyActivity extends Activity, implements CameraBridgeViewBase.CvCameraViewListener2    public View.OnClickListener onClickListener = completely new View.OnClickListener ()        @ Crush        on average a person becomes disabled when pressed (see v)            JNIlib.readImg ();            ;   / * Other irrelevant code * / 

    unsatisfiedlinkerror native method not found opencv

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    Insoddisfattolinkerror Metodo Nativo Non Trovato Opencv
    Unsatisfiedlinkerror Ursprunglig Metod Hittades Inte Opencv
    Niet Tevredenlinkerror Native Methode Niet Gevonden Opencv
    Unsatisfiedlinkerror 기본 메서드를 찾을 수 없음 Opencv
    Link Nao Satisfeito Ou Metodo Nativo Nao Encontrado Opencv
    Insatisfecho Linkerror Metodo Nativo No Encontrado Opencv
    Unbefriedigtlinkfehler Native Methode Nicht Gefunden Opencv
    Unsatisfiedlinkerror Sobstvennyj Metod Ne Najden Opencv
    Nie Znaleziono Natywnej Metody Unsatisfiedlinkerror Opencv
    Methode Native Unsatisfiedlinkerror Introuvable Opencv