如何在Android Studio和/或gradle中設置NDK_MODULE_PATH？

Question

我正在將Android庫從Eclipse遷移到Android Studio。 在Eclipse中，我可以通過Project> Properties> Resource> Linked Resources> Path Variables設置NDK_MODULE_PATH。 但是如何使用gradle分別在Android Studio中實現相同的功能呢？

我的庫構建，直到它試圖在NDK_MODULE_PATH下找到模塊的頭。

這是錯誤消息：

Executing tasks: [:libAndroid:compileDebugSources, :physicaloidLibrary:compileDebugSources]

Configuration on demand is an incubating feature.
:libAndroid:preBuild UP-TO-DATE
:libAndroid:preDebugBuild UP-TO-DATE
:libAndroid:checkDebugManifest
:libAndroid:preDebugAndroidTestBuild UP-TO-DATE
:libAndroid:preReleaseBuild UP-TO-DATE
:physicaloidLibrary:compileLint
:physicaloidLibrary:copyReleaseLint UP-TO-DATE
:physicaloidLibrary:mergeReleaseProguardFiles UP-TO-DATE
:physicaloidLibrary:preBuild UP-TO-DATE
:physicaloidLibrary:preReleaseBuild UP-TO-DATE
:physicaloidLibrary:checkReleaseManifest
:physicaloidLibrary:prepareReleaseDependencies
:physicaloidLibrary:compileReleaseAidl UP-TO-DATE
:physicaloidLibrary:compileReleaseRenderscript UP-TO-DATE
:physicaloidLibrary:generateReleaseBuildConfig UP-TO-DATE
:physicaloidLibrary:generateReleaseAssets UP-TO-DATE
:physicaloidLibrary:mergeReleaseAssets UP-TO-DATE
:physicaloidLibrary:generateReleaseResValues UP-TO-DATE
:physicaloidLibrary:generateReleaseResources UP-TO-DATE
:physicaloidLibrary:packageReleaseResources UP-TO-DATE
:physicaloidLibrary:processReleaseManifest UP-TO-DATE
:physicaloidLibrary:processReleaseResources UP-TO-DATE
:physicaloidLibrary:generateReleaseSources UP-TO-DATE
:physicaloidLibrary:compileReleaseJava UP-TO-DATE
:physicaloidLibrary:processReleaseJavaRes UP-TO-DATE
:physicaloidLibrary:packageReleaseJar UP-TO-DATE
:physicaloidLibrary:compileReleaseNdk UP-TO-DATE
:physicaloidLibrary:packageReleaseJniLibs UP-TO-DATE
:physicaloidLibrary:packageReleaseLocalJar UP-TO-DATE
:physicaloidLibrary:packageReleaseRenderscript UP-TO-DATE
:physicaloidLibrary:bundleRelease UP-TO-DATE
:libAndroid:prepareLibAndroidGradlePhysicaloidLibraryUnspecifiedLibrary UP-TO-DATE
:libAndroid:prepareDebugDependencies
:libAndroid:compileDebugAidl UP-TO-DATE
:libAndroid:compileDebugRenderscript UP-TO-DATE
:libAndroid:generateDebugBuildConfig UP-TO-DATE
:libAndroid:generateDebugAssets UP-TO-DATE
:libAndroid:mergeDebugAssets UP-TO-DATE
:libAndroid:generateDebugResValues UP-TO-DATE
:libAndroid:generateDebugResources UP-TO-DATE
:libAndroid:mergeDebugResources UP-TO-DATE
:libAndroid:processDebugManifest UP-TO-DATE
:libAndroid:processDebugResources UP-TO-DATE
:libAndroid:generateDebugSources UP-TO-DATE
:libAndroid:compileDebugJava UP-TO-DATE
:libAndroid:compileDebugNdk
AGPBI: {"kind":"SIMPLE","text":"/home/rhodo/dev/android/studio/LibAndroidGradle/libAndroid/src/main/jni/imageprocessing/dmtxutil.c:30:18: fatal error: dmtx.h: No such file or directory","position":{},"original":"/home/rhodo/dev/android/studio/LibAndroidGradle/libAndroid/src/main/jni/imageprocessing/dmtxutil.c:30:18: fatal error: dmtx.h: No such file or directory"}
AGPBI: {"kind":"SIMPLE","text":" #include \u003cdmtx.h\u003e","position":{},"original":" #include \u003cdmtx.h\u003e"}
AGPBI: {"kind":"SIMPLE","text":"                  ^","position":{},"original":"                  ^"}
AGPBI: {"kind":"SIMPLE","text":"compilation terminated.","position":{},"original":"compilation terminated."}
AGPBI: {"kind":"SIMPLE","text":"make: *** [/home/rhodo/dev/android/studio/LibAndroidGradle/libAndroid/build/intermediates/ndk/debug/obj/local/arm64-v8a/objs/Rhodo//home/rhodo/dev/android/studio/LibAndroidGradle/libAndroid/src/main/jni/imageprocessing/dmtxutil.o] Error 1","position":{},"original":"make: *** [/home/rhodo/dev/android/studio/LibAndroidGradle/libAndroid/build/intermediates/ndk/debug/obj/local/arm64-v8a/objs/Rhodo//home/rhodo/dev/android/studio/LibAndroidGradle/libAndroid/src/main/jni/imageprocessing/dmtxutil.o] Error 1"}


 FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':libAndroid:compileDebugNdk'.
> com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/opt/android-ndk/ndk-build'' finished with non-zero exit value 2

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 2.763 secs

有什么想法嗎？

Answer 1

使用：

• Gradle版本：3.3
• Android插件版本：com.android.tools.build：grad：2.3.1

這對我有用：

android {

    ...

    defaultConfig {

        ...

        ndk {
            abiFilters 'armeabi', 'armeabi-v7a'
        }

        externalNativeBuild {
            ndkBuild {
                // TODO replace jniDependencies folder with the path to your modules
                arguments "NDK_MODULE_PATH:=${rootProject.projectDir}/jniDependencies"
            }
        }
    }

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


}

這樣我就不需要將NDK_MODULE_PATH添加到我的PATH中來構建項目。 但是，clean任務失敗了，因為這不會從這里獲取參數，所以我需要添加另一個hack來解決這個問題：

tasks.withType(com.android.build.gradle.tasks.ExternalNativeCleanTask) {
    it.actions.clear()

    doLast {
        project.delete("${projectDir}/.externalNativeBuild")
    }
}

Answer 2

在Android Studio項目的根目錄下，有一個名為“local.properties”的文件。 添加名為“ndk.dir”的屬性並將值設置為指向ndk的位置。 類似於以下內容：

ndk.dir=/Users/username/sdk

我可能不理解你的問題。 如果您已經設置了ndk的位置並且只想確保構建模塊，那么將模塊添加到“settings.gradle”文件中。

include ":<your module name>"

然后確保將C代碼放在模塊中的“src / main / jni”中。 Gradle將根據文件夾名稱自動找到它。 不再需要設置NDK_MODULE_PATH。