在库模块中使用Kotlin而不在app模块

时间:2017-08-10 08:27:47

标签: android gradle kotlin

我试图在库模块中使用Kotlin而不在app模块中使用它。 app模块仅使用Java,不使用库中的任何Kotlin类。 Gradle不会编译:

Error:(2, 1) A problem occurred evaluating project ':<Library>'.
> Plugin with id 'kotlin-android' not found.

我做出的改变包括Kotlin:

{library root} / build.gradle

buildscript {
ext.kotlin_version = '1.1.3-2'

repositories {
    jcenter()
}
dependencies {
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    ...
}

allprojects {
repositories {
    jcenter()
}
}

{library root} / {library module} / build.gradle

apply plugin: 'com.android.library'
apply plugin: 'kotlin-android'
...

dependencies{
    ...
    compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
}

当我将相同的内容添加到应用模块时,项目会毫无问题地编译,但我想避免在应用模块中添加它,因为我想在多个应用中使用此库而不进行制作代码更改为这些应用

使用的Gradle版本:3.3 android gradle插件版本:2.3.3

编辑:@Jushua的答案有效,但仍需要更新项目root build.gradle。我希望找到一个解决方案,只需要添加对库的依赖就可以使整个过程发挥作用。

3 个答案:

答案 0 :(得分:7)

我能够毫无问题地做到这一点。

build.gradle(项目)

buildscript {
    ext.kotlin_version = "1.1.4"
    repositories {
        jcenter()
    }
    dependencies {
        classpath "com.android.tools.build:gradle:2.3.3"
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        jcenter()
        maven {
            url "https://maven.google.com"
        }
    }
}

build.gradle(app)

apply plugin: "com.android.application"

android {
    compileSdkVersion 26
    buildToolsVersion "26.0.1"

    defaultConfig {
        applicationId "com.example.app"
        minSdkVersion 21
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
        }
    }
}

dependencies {
    compile fileTree(dir: "libs", include: ["*.jar"])
    androidTestCompile("com.android.support.test.espresso:espresso-core:2.2.2", {
        exclude group: "com.android.support", module: "support-annotations"
    })
    compile "com.android.support:appcompat-v7:26.0.1"
    testCompile "junit:junit:4.12"
    compile project(path: ":library")
}

build.gradle(library)

apply plugin: "com.android.library"
apply plugin: "kotlin-android"
apply plugin: "kotlin-android-extensions"

android {
    compileSdkVersion 26
    buildToolsVersion "26.0.1"
    defaultConfig {
        minSdkVersion 17
        targetSdkVersion 26
        versionCode 13
        versionName "1.1.4"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
        }
    }
}

dependencies {
    compile fileTree(dir: "libs", include: ["*.jar"])
    androidTestCompile("com.android.support.test.espresso:espresso-core:2.2.2", {
        exclude group: "com.android.support", module: "support-annotations"
    })
    compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    compile "com.android.support:appcompat-v7:26.0.1"
    testCompile "junit:junit:4.12"
}

答案 1 :(得分:4)

您只需要添加模块构建:

buildscript {
  // (Optional) ext.kotlin_version = '1.1.4-3'

  repositories {
    google()
    jcenter()
  }

  dependencies {
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
  }
}

apply plugin: 'com.android.library'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'    

并且您可以在该特定构建中声明kotlin_version变量,或者在项目根构建文件中声明它,因为kotlin版本可以从其他模块更新:

buildscript {
  ext.kotlin_version = '1.1.4-3'

  repositories {
    google()
    jcenter()
  }

  dependencies {
    classpath 'com.android.tools.build:gradle:3.0.0-beta3'
  }
}

allprojects {
  repositories {
    google()
    jcenter()
  }
}

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

答案 2 :(得分:-1)

您只能在库中添加带有kotlin插件的buildscript部分:

buildscript {
    ext.kotlin_version = '1.1.4-2'

    repositories {
        mavenCentral()
    }
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

apply plugin: "kotlin-android"
apply plugin: "kotlin-android-extensions"

现在您可以将库包含到应用程序中,而无需修改root build.gradle

compile project(path: ":library")