在Android Studio中使用OpenCV Native Code

Question

我用C ++創建了一個OpenCV項目，並希望在Android設備上運行它。 我試圖設置我的android項目來運行本機代碼但沒有成功。 我目前正面臨這個錯誤：

錯誤：（23,0）找不到Gradle DSL方法：'compile（）'

我使用以下github示例進行本機android開發，以opencv為基礎： https ： //github.com/jlhonora/opencv-android-sample

到目前為止，我已經完成了以下操作以嘗試正確地進行同步：

更新的項目屬性如下所示：

ndk.dir=C\:\\Android\\sdk\\ndk-bundle
sdk.dir=C\:\\Android\\sdk
opencv.dir=C\:\\Android\\OpenCV-android-sdk

導入{OpenCV_DIR} \\ sdk \\ java作為模塊並將其作為模塊依賴項添加到項目結構設置中

這是opencv-sample-master \\ build.gradle：

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle-experimental:0.7.0-beta1'

    }
}
allprojects {
    repositories {
        jcenter()
    }
}
task clean(type: Delete) {
    delete rootProject.buildDir
}

dependencies {
    compile project(':OpenCVLib')
}

這是項目的build.gradle：

apply plugin: 'com.android.model.application'

model {
android {
    compileSdkVersion = 23
    buildToolsVersion = "23.0.2"

    defaultConfig.with {
        applicationId = "org.honorato.opencvsample"
        minSdkVersion.apiLevel = 15
        targetSdkVersion.apiLevel = 23
        versionCode = 1
        versionName = "1.0"
    }

    ndk {
        moduleName = "native"
        cppFlags.add("-I${file(getOpenCVDir())}".toString())
        cppFlags.add("-frtti")
        cppFlags.add("-fexceptions")
        ldLibs.addAll(["log", "opencv_java3"])
        stl    = "gnustl_static"
    }
}

android.buildTypes {
    release {
        // minifyEnabled = false
        // proguardFiles = getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

android.productFlavors {
    // for detailed abiFilter descriptions, refer to "Supported ABIs" @
    // https://developer.android.com/ndk/guides/abis.html#sa
    create("arm") {
        ndk.abiFilters.add("armeabi")
        ndk.ldFlags.add("-L${file('src/main/jniLibs/armeabi')}".toString())
    }
    create("arm7") {
        ndk.abiFilters.add("armeabi-v7a")
        ndk.ldFlags.add("-L${file('src/main/jniLibs/armeabi-v7a')}".toString())
    }
    create("arm8") {
        ndk.abiFilters.add("arm64-v8a")
        ndk.ldFlags.add("-L${file('src/main/jniLibs/arm64-v8a')}".toString())
    }
  }
}

def getOpenCVDir() {
   Properties properties = new Properties()
   properties.load(new File(rootDir.absolutePath +     "/local.properties").newDataInputStream())
   def externalModuleDir = properties.getProperty('opencv.dir', null)
   if (externalModuleDir == null) {
       throw new GradleException(
               "OpenCV location not found. Define location with opencv.dir in the local.properties file!")
   }
   return externalModuleDir
 }

dependencies {
   compile fileTree(dir: 'libs', include: ['*.jar'])
   compile 'com.android.support:appcompat-v7:23.1.1'
   compile project(':openCVLibrary300')
}

最后，opencv庫的build.gradle：

apply plugin: 'com.android.library'

dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')
    compile project(':{DIR}:workspace:appcompat_v7')
}

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"

    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = ['src']
            resources.srcDirs = ['src']
            aidl.srcDirs = ['src']
            renderscript.srcDirs = ['src']
            res.srcDirs = ['res']
            assets.srcDirs = ['assets']
        }    

        // Move the tests to tests/java, tests/res, etc...
        instrumentTest.setRoot('tests')

        // Move the build types to build-types/<type>
        // For instance, build-types/debug/java, build-types/debug/AndroidManifest.xml, ...
        // This moves them out of them default location under src/<type>/... which would
        // conflict with src/ being used by the main source set.
        // Adding new build types or product flavors should be accompanied
        // by a similar customization.
        debug.setRoot('build-types/debug')
        release.setRoot('build-types/release')
    }
}

如果有人可以幫我解決這個問題，以及如何開始使用opencv進行本機android開發，我將非常感謝！

Answer 1

您的問題可能來自您的依賴關系標志：

 compile project(':openCVLibrary300')

當您使用gradle.0.7.0 alpha定義項目時，可能您的opencv gradle文件是從gradle stable release 2.8或2.10編譯的。

gradle 0.7.0

apply plugin: 'com.android.model.application'

gradle 2.10

apply plugin: 'com.android.library'

可能，您的opencv gradle文件未正確定義。

所以你有兩個選擇。

如果要以純模式調試應用程序，請將opencv gradle文件更改為0.7.0或將代碼更改為gradle 2.10。