在Android项目中包括OpenCV会产生“未解决的依赖”错误

Question

我正在尝试将OpenCV包含在我的Android项目中，逐步使用this指南。但是，在将OpenCV添加为模块依赖项(指南中的步骤4)之后，Gradle项目同步将失败，出现以下错误：

ERROR: Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve project :openCVLibrary410.
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Affected Modules: app


ERROR: Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve project :openCVLibrary410.
Show Details
Affected Modules: app


ERROR: Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve project :openCVLibrary410.
Show Details
Affected Modules: app

我找到了this related question，并尝试通过添加一个调试字段来调整openCV build.gradle中的buildTypes，但是它没有改变任何东西。我还尝试调整应用程序的build.gradle，如下所示

    buildTypes {
        release {
            ...
        }
        debug {
            matchingFallbacks = ['release']
        }
    }

(还有几个略有不同的版本，因为我不完全确定自己在那里做了什么)，但都没有帮助。我还尝试将OpenCV库的构建变体设置为发行版本而不是调试版本，但这导致了以下错误：

Unable to find a matching variant of project :openCVLibrary410:
  - Variant 'debugApiElements':
      - Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'debug'.
      - Found com.android.build.api.attributes.VariantAttr 'debug' but wasn't required.
      - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Apk'.
      - Required org.gradle.usage 'java-api' and found compatible value 'java-api'.
  - Variant 'debugBundleElements':
      - Required com.android.build.api.attributes.BuildTypeAttr 'debug' but no value provided.
      - Found com.android.build.api.attributes.VariantAttr 'debug' but wasn't required.
      - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' but no value provided.
      - Required org.gradle.usage 'java-api' and found incompatible value 'android-bundle'.
  - Variant 'debugMetadataElements':
      - Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'debug'.
      - Found com.android.build.api.attributes.VariantAttr 'debug' but wasn't required.
      - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Metadata'.
      - Required org.gradle.usage 'java-api' but no value provided.
  - Variant 'debugRuntimeElements':
      - Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'debug'.
      - Found com.android.build.api.attributes.VariantAttr 'debug' but wasn't required.
      - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Apk'.
      - Required org.gradle.usage 'java-api' and found incompatible value 'java-runtime'.
  - Variant 'releaseApiElements':
      - Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'release'.
      - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
      - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Apk'.
      - Required org.gradle.usage 'java-api' and found compatible value 'java-api'.
  - Variant 'releaseBundleElements':
      - Required com.android.build.api.attributes.BuildTypeAttr 'debug' but no value provided.
      - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
      - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' but no value provided.
      - Required org.gradle.usage 'java-api' and found incompatible value 'android-bundle'.
  - Variant 'releaseMetadataElements':
      - Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'release'.
      - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
      - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Metadata'.
      - Required org.gradle.usage 'java-api' but no value provided.
  - Variant 'releaseRuntimeElements':
      - Required com.android.build.api.attributes.BuildTypeAttr 'debug' and found compatible value 'release'.
      - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
      - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found incompatible value 'Apk'.
      - Required org.gradle.usage 'java-api' and found incompatible value 'java-runtime'.

知道怎么解决这个问题吗？

Answer 1

我终于改变了路线，解决了这个问题

apply plugin: 'com.android.application'

在导入的OpenCV模块的build.gradle文件中

apply plugin: 'com.android.library'

并在同一个gradle文件中删除defaultConfig字段。我找到了这个解决方案，here。

Answer 2

导入版本3.4.6略早于最新版本。最新版本可能还不稳定。

同样的症状发生在我的环境中，但使用3.4.6版本解决了。