Question

我只是通过执行ndk-build来开发使用C ++代码的Android应用程序。我一直使用OpenCV，所以在我的 Android.mk 中有：

include $(CLEAR_VARS)

OPENCV_LIB_TYPE:=SHARED
OPENCV_CAMERA_MODULES:=off
OPENCV_INSTALL_MODULES:=on

include /Users/rafaelruizmunoz/Desktop/Android_Tools/OpenCV-2.4.9-android-sdk/sdk/native/jni/OpenCV.mk

include $(OPENCV_PATH)

并且它一直很好用。

现在我想用Android Studio调试C ++代码，我不得不在gradle中做一些修改。

首先，gradle没有看到包含文件，but I read this question in StackOverflow，它教我如何包含文件。现在，当我尝试构建我的应用程序时，出现以下错误：

错误：（60）未定义引用＆＃39; cv :: _ InputArray :: _ InputArray（cv :: Mat const＆amp;）＆＃39;

错误：（60）未定义引用＆＃39; cv :: _ OutputArray :: _ OutputArray（cv :: Mat＆amp;）＆＃39;

错误：（60）未定义引用＆＃39; cv :: cvtColor（cv :: _ InputArray const＆amp;，cv :: _ OutputArray const＆amp;，int，int）＆＃39;

错误：（62）未定义引用＆＃39; cv :: _ InputArray :: _ InputArray（cv :: Mat const＆amp;）＆＃39;

错误：（62）未定义引用＆＃39; cv :: _ OutputArray :: _ OutputArray（cv :: Mat＆amp;）＆＃39;

错误：（62）未定义引用＆＃39; cv :: resize（cv :: _ InputArray const＆amp;，cv :: OutputArray const＆amp;，cv :: Size ，double，double， INT）＆＃39;

错误：（73）未定义引用＆＃39; cv :: Mat :: t（）const＆＃39;

错误：（73）未定义引用＆＃39; cv :: _ InputArray :: _ InputArray（cv :: MatExpr const＆amp;）＆＃39;

错误：（73）未定义引用＆＃39; cv :: _ OutputArray :: _ OutputArray（cv :: Mat＆amp;）＆＃39;

这让我怀疑找不到这些库。我尝试将其添加到我的cFlags中：

productFlavors {
    x86 {
        flavorDimension "abi"
        ndk {
            abiFilter "x86"
            stl "stlport_shared"
            cFlags "-std=c99 " +
                    "-fexceptions " +
                    "-I/Users/rafaelruizmunoz/Desktop/Android_Tools/OpenCV-2.4.9-android-sdk/sdk/native/jni/include " +
                    "-L/Users/rafaelruizmunoz/Desktop/Android_Tools/OpenCV-2.4.9-android-sdk/sdk/native/libs/x86 " +
                    "-lopencv_calib3d -lopencv_contrib -lopencv_core -lopencv_features2d -lopencv_flann -lopencv_gpu -lopencv_highgui -lopencv_imgproc -lopencv_legacy -lopencv_ml -lopencv_nonfree -lopencv_objdetect -lopencv_ocl -lopencv_photo -lopencv_stitching -lopencv_superres -lopencv_ts -lopencv_video -lopencv_videostab"
        }
    }
    arm {
        flavorDimension "abi"
        ndk {
            abiFilter "armeabi-v7a"
            stl "stlport_shared"
            cFlags "-std=c99 " +
                    "-fexceptions " +
                    "-I/Users/rafaelruizmunoz/Desktop/Android_Tools/OpenCV-2.4.9-android-sdk/sdk/native/jni/include " +
                    "-L/Users/rafaelruizmunoz/Desktop/Android_Tools/OpenCV-2.4.9-android-sdk/sdk/native/libs/armeabi-v7a " +
                    "-lopencv_calib3d -lopencv_contrib -lopencv_core -lopencv_features2d -lopencv_flann -lopencv_gpu -lopencv_highgui -lopencv_imgproc -lopencv_legacy -lopencv_ml -lopencv_nonfree -lopencv_objdetect -lopencv_ocl -lopencv_photo -lopencv_stitching -lopencv_superres -lopencv_ts -lopencv_video -lopencv_videostab"
        }
    }
}

我也试过这个：

buildTypes {
    debug {
        debuggable true
        jniDebuggable = true
        ndk {
            abiFilter "x86"
            stl "stlport_shared"
            cFlags "-std=c99 " +
                    "-fexceptions " +
                    "-I/Users/rafaelruizmunoz/Desktop/Android_Tools/OpenCV-2.4.9-android-sdk/sdk/native/jni/include " +
                    "-L/Users/rafaelruizmunoz/Desktop/Android_Tools/OpenCV-2.4.9-android-sdk/sdk/native/libs/x86 " +
                    "-L/Users/rafaelruizmunoz/Desktop/Android_Tools/OpenCV-2.4.9-android-sdk/sdk/native/libs/armeabi-v7a " +
                    "-lopencv_calib3d -lopencv_contrib -lopencv_core -lopencv_features2d -lopencv_flann -lopencv_gpu -lopencv_highgui -lopencv_imgproc -lopencv_legacy -lopencv_ml -lopencv_nonfree -lopencv_objdetect -lopencv_ocl -lopencv_photo -lopencv_stitching -lopencv_superres -lopencv_ts -lopencv_video -lopencv_videostab"
    }
    release {
        debuggable true
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }

}

但错误仍然存在。它无法找到图书馆。

我该怎么做？

提前谢谢。

Answer 1

您需要 ldLibs 和 ldFlags 来指定链接库。使用 exeprimental 插件，我使用以下片段：

def appAbi = "armeabi-v7a"
def OpenCV_sdk = "~/opencv/sdk"
…
model { android.ndk {
…
    ldFlags += "-L$OpenCV_sdk/native/libs/$appAbi".toString()
    ldFlags += "-L$OpenCV_sdk/native/3rdparty/libs/$appAbi".toString()
    ldLibs += ['opencv_imgproc', 'opencv_core', 'opencv_hal', 'tbb']
} }

Gradle无法通过NDK

1 个答案: