如何将 Maven 清单添加到指定依赖项的 AAR

Question

我（终于）能够使用本指南将我的 Android 库发布到 AWS S3 maven 存储库。 它作为 AAR 而不是 JAR 文件发布，这意味着即使生成的 POM 文件列出了其所有内部依赖项，在将库添加到另一个项目时它们也会被忽略。 似乎是一个很常见的问题。 我从中了解到， 我只需要在 maven manifest 中列出依赖项，但是这是如何完成的呢？

我真的是这方面的新手，所以越简单越好......谢谢！

注意：我也发现了这个问题，所以我在依赖实现行的末尾添加了“{transitive=true}”并且它起作用了。

所以现在要成功包含我的库，依赖项必须编码为：

implementation (group: 'com.mygroup', name: 'my_library', version: '1.3', ext: 'aar', classifier: 'release') { transitive=true changing=true }

（我包括“改变=真”来强制它每次重新下载库。）

如果我不包含“transitive=true”，我会收到以下错误：

    02-04 20:11:48.462 10225-10225/com.mydomain.app.testapplication4 E/dalvikvm: Could not find class 'android.graphics.drawable.RippleDrawable', referenced from method android.support.v7.widget.AppCompatImageHelper.hasOverlappingRendering
    02-04 20:14:07.080 10225-10225/com.mydomain.app.testapplication4 E/dalvikvm: Could not find class 'android.app.NotificationChannel', referenced from method com.mydomain.library.mydomain$1.onReceive
    02-04 20:14:07.290 10225-10225/com.mydomain.app.testapplication4 E/AndroidRuntime: FATAL EXCEPTION: main
        java.lang.NoClassDefFoundError: com.google.firebase.iid.FirebaseInstanceId
            at com.mydomain.library.MyActivity.onCreate(MyActivity.java:88)
            at android.app.Activity.performCreate(Activity.java:4701)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1051)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1924)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1985)
            at android.app.ActivityThread.access$600(ActivityThread.java:127)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1151)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4477)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:788)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555)
            at dalvik.system.NativeStart.main(Native Method)

这是我用来发布库的最新脚本（注意它只发布发布版本，但依赖行仍然需要“发布”分类器）：

    apply plugin: 'maven-publish'

    group = 'com.mydomain'
    version = '1.3'

    // Add sources as an artifact
    task sourceJar(type: Jar) {
        from android.sourceSets.main.java.srcDirs
        classifier "source"
    }

    // Loop over all variants
    android.libraryVariants.all { variant ->
        if (variant.buildType.name == "release") { // only release build
        variant.outputs.all { output ->
            // This creates a publication for each variant
            publishing.publications.create(variant.name, MavenPublication) {
                // The sources artifact from earlier
                artifact sourceJar

                // Variant dependent artifact, e.g. release, debug
                artifact source: output.outputFile, classifier: output.name

                // Go through all the dependencies for each variant and add them to the POM
                // file as dependencies
                pom.withXml {
                    final dependenciesNode = asNode().appendNode('dependencies')

                    ext.addDependency = { Dependency dep, String scope ->
                        if (dep.group == null || dep.version == null || dep.name == null || dep.name == "unspecified")
                            return // ignore invalid dependencies

                        final dependencyNode = dependenciesNode.appendNode('dependency')
                        dependencyNode.appendNode('groupId', dep.group)
                        dependencyNode.appendNode('artifactId', dep.name)
                        dependencyNode.appendNode('version', dep.version)
                        dependencyNode.appendNode('scope', scope)

                        if (!dep.transitive) {
                            // If this dependency is transitive, we should force exclude all its dependencies them from the POM
                            final exclusionNode = dependencyNode.appendNode('exclusions').appendNode('exclusion')
                            exclusionNode.appendNode('groupId', '*')
                            exclusionNode.appendNode('artifactId', '*')
                        } else if (!dep.properties.excludeRules.empty) {
                            // Otherwise add specified exclude rules
                            final exclusionNode = dependencyNode.appendNode('exclusions').appendNode('exclusion')
                            dep.properties.excludeRules.each { ExcludeRule rule ->
                                exclusionNode.appendNode('groupId', rule.group ?: '*')
                                exclusionNode.appendNode('artifactId', rule.module ?: '*')
                            }
                        }
                    }

                    // List all "compile" dependencies (for old Gradle)
                    configurations.compile.getDependencies().each { dep -> addDependency(dep, "compile") }
                    // List all "api" dependencies (for new Gradle) as "compile" dependencies
                    configurations.api.getDependencies().each { dep -> addDependency(dep, "compile") }
                    // List all "implementation" dependencies (for new Gradle) as "runtime" dependencies
                    configurations.implementation.getDependencies().each { dep -> addDependency(dep, "runtime") }
                }
            }
        }
        }
    }

    // Ensure that the publish task depends on assembly
    tasks.all { task ->
        if (task instanceof AbstractPublishToMaven) {
            task.dependsOn assemble
        }
    }

    // Configure the destination repository with
    // S3 URL and access credentials
    publishing {
        // Properties properties = new Properties()
        // properties.load(file('maven.properties').newDataInputStream())

        repositories {
            maven {
                url "s3://androidsdk.mydomain.com.s3.amazonaws.com"
                credentials(AwsCredentials) {
                    accessKey "myaccesskey"
                    secretKey "mysecretkey"
                }
            }
        }
    }

以下是库的 gradle.build 文件中的依赖项：

    dependencies {
        api fileTree(include: ['*.jar'], dir: 'libs')
        api 'com.android.support:appcompat-v7:27.1.1'
        api 'com.android.support.constraint:constraint-layout:1.1.3'
        api 'com.android.support:design:27.1.1'
        api 'io.reactivex.rxjava2:rxandroid:2.1.0'
        api 'io.reactivex.rxjava2:rxjava:2.2.4'
        api 'com.github.instacart.truetime-android:library-extension-rx:3.3'
        api 'com.google.dagger:dagger-android:2.15'
        annotationProcessor 'com.google.dagger:dagger-android-processor:2.15'
        annotationProcessor 'com.google.dagger:dagger-compiler:2.15'
        api 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'
        api 'com.google.firebase:firebase-core:16.0.7'
        api 'com.google.firebase:firebase-messaging:17.3.4'
    }

我在想下面生成的 POM 文件可能与库的依赖项不匹配，但它们确实如此。 POM 文件中的“范围”标签应该不需要“transitive=true”，对吧？

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.mydomain</groupId>
  <artifactId>my_library</artifactId>
  <version>1.3</version>
  <packaging>pom</packaging>
  <dependencies>
    <dependency>
      <groupId>com.android.support</groupId>
      <artifactId>appcompat-v7</artifactId>
      <version>27.1.1</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.android.support.constraint</groupId>
      <artifactId>constraint-layout</artifactId>
      <version>1.1.3</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.android.support</groupId>
      <artifactId>design</artifactId>
      <version>27.1.1</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>io.reactivex.rxjava2</groupId>
      <artifactId>rxandroid</artifactId>
      <version>2.1.0</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>io.reactivex.rxjava2</groupId>
      <artifactId>rxjava</artifactId>
      <version>2.2.4</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.github.instacart.truetime-android</groupId>
      <artifactId>library-extension-rx</artifactId>
      <version>3.3</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.google.dagger</groupId>
      <artifactId>dagger-android</artifactId>
      <version>2.15</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.nostra13.universalimageloader</groupId>
      <artifactId>universal-image-loader</artifactId>
      <version>1.9.5</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.google.firebase</groupId>
      <artifactId>firebase-core</artifactId>
      <version>16.0.6</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.google.firebase</groupId>
      <artifactId>firebase-messaging</artifactId>
      <version>17.3.4</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>
</project>

Answer 1

您应该能够通过更改POM XML生成来解决此问题，以便<packaging>部分设置为aar而不是pom ：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.humanvideoboard</groupId>
  <artifactId>hvb_library</artifactId>
  <version>1.0</version>
  <packaging>aar</packaging>

但是，现在我正在重新检查它，它与transitive依赖关系一起工作的原因是在构建库时或在构建使用库的东西时使用implementation vs api 。 如果您的库将其依赖项中的类型作为其公共API的一部分公开，则需要在库构建中正确处理这些构建依赖项。 有关更多信息，请参阅此页面 。

Answer 2

我遇到过类似的问题，但我的问题是在发布块中我使用了“库”函数而不是“maven”函数

在我的库 build.gradle 我有这样的块：

afterEvaluation{
   publishing {
       publications {
            maven(MavenPublication) { // here I had library(MvenPublication) which caused the packaing to be pom instead of aar
           artifacts = ["build/outputs/aar/library-release.aar"]
       }
    }
  }