未定義引用錯誤連接本機的功能，Android的

我試圖本地函數鏈接到Java，但我得到這個錯誤 -未定義引用錯誤連接本機的功能，Android的

> Error:(72) undefined reference to `ConvertYUV420SPToARGB8888HalfSize' 
> Error:(76) undefined reference to `ConvertYUV420SPToARGB8888' 
> Error:(95) undefined reference to `ConvertYUV420SPToARG Error:(102) 
> undefined reference to `ConvertYUV420ToARGB8888' Error:(124) undefined 
> reference to `ConvertYUV420SPToRGB565' Error:(141) undefined reference 
> to `ConvertARGB8888ToYUV420SP' Error:(158) undefined reference to 
> `ConvertRGB565ToYUV420SP'

我無法整合成功是我的應用程序。這是我的活動調用這個函數的java的變體光盤：

public class ClassifierActivity extends CameraActivity implements OnImageAvailableListener { 
    static { 
    System.loadLibrary("imageutils_jni"); 
    } 
... 
... 
... 

    ImageUtils.convertYUV420ToARGB8888(
       yuvBytes[0], 
       yuvBytes[1], 
       yuvBytes[2], 
       rgbBytes, 
       previewWidth, 
       previewHeight, 
       yRowStride, 
       uvRowStride, 
       uvPixelStride, 
       false); 
      computing=false; 
      image.close(); 
     } catch (final Exception e) { 
      if (image != null) { 
      image.close(); 
      }

這是該函數的實例：

public static native void convertYUV420ToARGB8888(
     byte[] y, 
     byte[] u, 
     byte[] v, 
     int[] output, 
     int width, 
     int height, 
     int yRowStride, 
     int uvRowStride, 
     int uvPixelStride, 
     boolean halfSize);

這是我jni.cc文件

#include <jni.h> 
#include <stdio.h> 
#include <stdlib.h> 

#include "rgb2yuv.h" 
#include "yuv2rgb.h" 

#define IMAGEUTILS_METHOD(METHOD_NAME) \ 
    Java_com_example_harsimar_knp_veggiedetector_ImageUtils_##METHOD_NAME // NOLINT 

#ifdef __cplusplus 
extern "C" { 
#endif 

JNIEXPORT void JNICALL 
IMAGEUTILS_METHOD(convertYUV420SPToARGB8888)(
     JNIEnv* env, jclass clazz, jbyteArray input, jintArray output, 
     jint width, jint height, jboolean halfSize); 

JNIEXPORT void JNICALL IMAGEUTILS_METHOD(convertYUV420ToARGB8888)(
     JNIEnv* env, jclass clazz, jbyteArray y, jbyteArray u, jbyteArray v, 
     jintArray output, jint width, jint height, jint y_row_stride, 
     jint uv_row_stride, jint uv_pixel_stride, jboolean halfSize); 

JNIEXPORT void JNICALL IMAGEUTILS_METHOD(convertYUV420SPToRGB565)(
     JNIEnv* env, jclass clazz, jbyteArray input, jbyteArray output, jint width, 
     jint height); 

JNIEXPORT void JNICALL 
IMAGEUTILS_METHOD(convertARGB8888ToYUV420SP)(
     JNIEnv* env, jclass clazz, jintArray input, jbyteArray output, 
     jint width, jint height); 

JNIEXPORT void JNICALL 
IMAGEUTILS_METHOD(convertRGB565ToYUV420SP)(
     JNIEnv* env, jclass clazz, jbyteArray input, jbyteArray output, 
     jint width, jint height); 

#ifdef __cplusplus 
} 
#endif 

JNIEXPORT void JNICALL 
IMAGEUTILS_METHOD(convertYUV420SPToARGB8888)(
     JNIEnv* env, jclass clazz, jbyteArray input, jintArray output, 
     jint width, jint height, jboolean halfSize) { 
    jboolean inputCopy = JNI_FALSE; 
    jbyte* const i = env->GetByteArrayElements(input, &inputCopy); 

    jboolean outputCopy = JNI_FALSE; 
    jint* const o = env->GetIntArrayElements(output, &outputCopy); 

    if (halfSize) { 
     ConvertYUV420SPToARGB8888HalfSize(reinterpret_cast<uint8_t*>(i), 
              reinterpret_cast<uint32_t*>(o), width, 
              height); 
    } else { 
     ConvertYUV420SPToARGB8888(reinterpret_cast<uint8_t*>(i), 
            reinterpret_cast<uint8_t*>(i) + width * height, 
            reinterpret_cast<uint32_t*>(o), width, height); 
    } 

    env->ReleaseByteArrayElements(input, i, JNI_ABORT); 
    env->ReleaseIntArrayElements(output, o, 0); 
} 

JNIEXPORT void JNICALL IMAGEUTILS_METHOD(convertYUV420ToARGB8888)(
     JNIEnv* env, jclass clazz, jbyteArray y, jbyteArray u, jbyteArray v, 
     jintArray output, jint width, jint height, jint y_row_stride, 
     jint uv_row_stride, jint uv_pixel_stride, jboolean halfSize) { 
    jboolean inputCopy = JNI_FALSE; 
    jbyte* const y_buff = env->GetByteArrayElements(y, &inputCopy); 
    jboolean outputCopy = JNI_FALSE; 
    jint* const o = env->GetIntArrayElements(output, &outputCopy); 

    if (halfSize) { 
     ConvertYUV420SPToARGB8888HalfSize(reinterpret_cast<uint8_t*>(y_buff), 
              reinterpret_cast<uint32_t*>(o), width, 
              height); 
    } else { 
     jbyte* const u_buff = env->GetByteArrayElements(u, &inputCopy); 
     jbyte* const v_buff = env->GetByteArrayElements(v, &inputCopy); 

     ConvertYUV420ToARGB8888(
       reinterpret_cast<uint8_t*>(y_buff), reinterpret_cast<uint8_t*>(u_buff), 
       reinterpret_cast<uint8_t*>(v_buff), reinterpret_cast<uint32_t*>(o), 
       width, height, y_row_stride, uv_row_stride, uv_pixel_stride); 

     env->ReleaseByteArrayElements(u, u_buff, JNI_ABORT); 
     env->ReleaseByteArrayElements(v, v_buff, JNI_ABORT); 
    } 

    env->ReleaseByteArrayElements(y, y_buff, JNI_ABORT); 
    env->ReleaseIntArrayElements(output, o, 0); 
} 

JNIEXPORT void JNICALL IMAGEUTILS_METHOD(convertYUV420SPToRGB565)(
     JNIEnv* env, jclass clazz, jbyteArray input, jbyteArray output, jint width, 
     jint height) { 
    jboolean inputCopy = JNI_FALSE; 
    jbyte* const i = env->GetByteArrayElements(input, &inputCopy); 

    jboolean outputCopy = JNI_FALSE; 
    jbyte* const o = env->GetByteArrayElements(output, &outputCopy); 

    ConvertYUV420SPToRGB565(reinterpret_cast<uint8_t*>(i), 
          reinterpret_cast<uint16_t*>(o), width, height); 

    env->ReleaseByteArrayElements(input, i, JNI_ABORT); 
    env->ReleaseByteArrayElements(output, o, 0); 
} 

JNIEXPORT void JNICALL 
IMAGEUTILS_METHOD(convertARGB8888ToYUV420SP)(
     JNIEnv* env, jclass clazz, jintArray input, jbyteArray output, 
     jint width, jint height) { 
    jboolean inputCopy = JNI_FALSE; 
    jint* const i = env->GetIntArrayElements(input, &inputCopy); 

    jboolean outputCopy = JNI_FALSE; 
    jbyte* const o = env->GetByteArrayElements(output, &outputCopy); 

    ConvertARGB8888ToYUV420SP(reinterpret_cast<uint32_t*>(i), 
           reinterpret_cast<uint8_t*>(o), width, height); 

    env->ReleaseIntArrayElements(input, i, JNI_ABORT); 
    env->ReleaseByteArrayElements(output, o, 0); 
} 

JNIEXPORT void JNICALL 
IMAGEUTILS_METHOD(convertRGB565ToYUV420SP)(
     JNIEnv* env, jclass clazz, jbyteArray input, jbyteArray output, 
     jint width, jint height) { 
    jboolean inputCopy = JNI_FALSE; 
    jbyte* const i = env->GetByteArrayElements(input, &inputCopy); 

    jboolean outputCopy = JNI_FALSE; 
    jbyte* const o = env->GetByteArrayElements(output, &outputCopy); 

    ConvertRGB565ToYUV420SP(reinterpret_cast<uint16_t*>(i), 
          reinterpret_cast<uint8_t*>(o), width, height); 

    env->ReleaseByteArrayElements(input, i, JNI_ABORT); 
    env->ReleaseByteArrayElements(output, o, 0); 
}

這是我的應用程序級別的gradle文件：

apply plugin: 'com.android.application' 

android { 
    compileSdkVersion 25 
    buildToolsVersion "25.0.3" 
    defaultConfig { 
     applicationId "com.example.harsimar.kpn_veggiedetector" 
     minSdkVersion 15 
     targetSdkVersion 25 
     versionCode 1 
     versionName "1.0" 
     testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 
    } 
    buildTypes { 
     release { 
      minifyEnabled false 
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
     } 
    } 
    sourceSets { 
     main { 
      assets.srcDirs = ['assets'] 
      jniLibs.srcDirs = ['libs'] 
      jni.srcDirs = [] 
     } 
    } 
    aaptOptions { noCompress 'pb' } 
    lintOptions { 
     abortOnError false 
    } 
    externalNativeBuild { 
     cmake { 
      path "CMakeLists.txt" 
     } 

    } 

    dependencies { 
     compile fileTree(dir: 'libs', include: ['*.jar']) 
     compile files('libs/libandroid_tensorflow_inference_java.jar') 
     androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { 
      exclude group: 'com.android.support', module: 'support-annotations' 
     }) 
     compile 'com.android.support:appcompat-v7:25.3.1' 
     compile 'com.android.support.constraint:constraint-layout:1.0.2' 
     compile 'com.flurgle:camerakit:0.9.17' 
     testCompile 'junit:junit:4.12' 
    } 
}

CMake的文件是這樣的：

cmake_minimum_required(VERSION 3.4.1) 

add_library(
      native-lib 
      SHARED 
      src/main/jni/imageutils_jni.cc 
      ) 


find_library(
      android-lib 
      android 
      ) 
file(
      GLOB SOURCES 
      src/main/jni/*.h 
      src/main/jni/*.cpp 
      ) 
include_directories(src/main/cpp) 
include_directories(src/main/jni)

我有所需的頭部和其他文件在同一目錄下JNI文件。請幫助我，在此先感謝！

來源

2017-06-07 Simar

「未定義的引用錯誤」通常發生在未鏈接依賴obj文件或未按正確順序鏈接它時。你可以檢查包含ImageUtils的「.cc」文件是否正確鏈接到你的cmake文件中？如果您不確定，請提供以下信息： 1.包含「ImageUtils」的「.cc」文件路徑 2.鏈接「.cc」文件的obj的代碼片段。

來源

2017-06-14 19:37:30

未定義引用錯誤連接本機的功能，Android的

回答

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