無法通過ndk支持構建android項目

Question

這是我的Android.mk文件

LOCAL_PATH：= $（調用my-dir）

包括$（CLEAR_VARS）

OPENCV_INSTALL_MODULES：= on include $（OPENCV_ANDROID_SDK）/sdk/native/jni/OpenCV.mk

LOCAL_MODULE：=人臉庫LOCAL_SRC_FILES + = $（LOCAL_PATH）/face-lib.cpp $（LOCAL_PATH）/FaceRecognitionLib/Facebase.cpp LOCAL_SRC_FILES + = $（LOCAL_PATH）/FaceRecognitionLib/Eigenfaces.cpp $（LOCAL_PATH） .cpp LOCAL_SRC_FILES + = $（LOCAL_PATH）/FaceRecognitionLib/PCA.cpp $（LOCAL_PATH）/FaceRecognitionLib/LDA.cpp LOCAL_C_INCLUDES + = $（EIGEN3_DIR）$（LOCAL_PATH）/ FaceRecognitionLIBS = -LSV -RedSV + = -std = gnu ++ 11 -frtti -fexceptions

包括$（BUILD_SHARED_LIBRARY）

搖籃文件

externalNativeBuild {
        ndkBuild {
            path 'src/main/cpp/Android.mk'
        }
    }

我得到的錯誤

錯誤：配置項目'：app'時發生問題。 為ndkBuild執行外部本機構建D：\\ FaceRecognition \\ FaceRecognitionApp \\ app \\ src \\ main \\ cpp \\ Android.mk

Answer 1

您可以使用以下代碼構建.so文件，不要忘記更改ndk路徑。

import org.apache.tools.ant.taskdefs.condition.Os

android {
       .
       .
    sourceSets.main {
            jniLibs.srcDir 'src/main/libs' //set libs as .so's location instead of jniLibs
            jni.srcDirs = [] //disable automatic ndk-build call with auto-generated Android.mk
        }

        // call regular ndk-build(.cmd) script from app directory
        task ndkBuild(type: Exec) {
            if (Os.isFamily(Os.FAMILY_WINDOWS)) {
                commandLine 'D:\\sdk\\android-ndk\\ndk-build.cmd', '-C', file('src/main/jni').absolutePath
            } else {
                commandLine 'ndk-build', '-C', file('src/main/jni').absolutePath
            }
        }

        tasks.withType(JavaCompile) {
            compileTask -> compileTask.dependsOn ndkBuild
        }
}