gRPC protobuf 未使用 kotlin 构建进行编译（Android Studio 3.0）

Question

我在 https://github.com/grpc/grpc-java/tree/master/examples/android/helloworld

为 android 项目创建了一个与示例 gRPC 非常相似的 gRPC 项目

我第一次以某种方式获得了自己的项目，其中包含我自己的简单 .proto 文件，编译时没有出现任何错误。我只是复制并粘贴了所有重要的 build.gradle 部分。我更改了 MainActivity Kotlin 代码的以下构建也能正常工作。

但是现在，我在 .proto 文件中添加了更多内容，Gradle 无法构建我的项目。 .proto 文件是正确的，我已经尝试将其添加为 compileDebugKotlin{} 和 compileReleaseKotlin{} 的依赖项，但没有任何效果。我收到以下错误消息，指出任务 :generateDebugProto 未定义。

但我很困惑，因为当我在 build.gradle 中添加一个换行符并在 Android Studio 中单击 Sync now 时，Gradle 同步成功完成并且在 gradle 日志我看到以下几行：

:app:extractDebugProto
:app:extractIncludeDebugProto
:app:extractProto
:app:generateDebugProto

我是不是做错了什么？

我的项目build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    ext.kotlin_version = '1.2.0'
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath "com.google.protobuf:protobuf-gradle-plugin:0.8.3"

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

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

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

我的模块级别build.gradle

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

apply plugin: 'com.google.protobuf'

android {
    compileSdkVersion 26
    ext.buildType =  ""
    defaultConfig {
        applicationId "com.my.appr"
        minSdkVersion 15
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            buildType = "Release"
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        debug {
            buildType = "Debug"
        }
    }
    sourceSets {
        debug.java.srcDirs += 'build/generated/source/proto/debug/java'
        debug.java.srcDirs += 'build/generated/source/proto/debug/grpc'
        debug.java.srcDirs += 'build/generated/source/proto/debug/javalite'
        release.java.srcDirs += 'build/generated/source/proto/release/java'
        release.java.srcDirs += 'build/generated/source/proto/release/grpc'
        release.java.srcDirs += 'build/generated/source/proto/release/javalite'
        main.proto.srcDirs += 'src/main/proto'
    }
    //preBuild.dependsOn(":generateDebugProto")
}


protobuf {
    protoc {
        artifact = 'com.google.protobuf:protoc:3.5.0'
    }
    plugins {
        javalite {
            artifact = "com.google.protobuf:protoc-gen-javalite:3.0.0"
        }
        grpc {
            artifact = 'io.grpc:protoc-gen-grpc-java:1.8.0' // CURRENT_GRPC_VERSION
        }
    }
    generateProtoTasks {
        all().each { task ->
            task.plugins {
                javalite {}
                grpc {
                    // Options added to --grpc_out
                    option 'lite'
                }
            }
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation"org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
    implementation 'io.grpc:grpc-okhttp:1.8.0' // CURRENT_GRPC_VERSION
    implementation 'io.grpc:grpc-protobuf-lite:1.8.0' // CURRENT_GRPC_VERSION
    implementation 'io.grpc:grpc-stub:1.8.0' // CURRENT_GRPC_VERSION
    implementation 'javax.annotation:javax.annotation-api:1.2'
}


//preBuild.dependsOn ":generate"+buildType+"proto"

Answer 1

4小时后我解决了问题！

出于某些奇怪的原因，我不得不添加此代码块：

task.builtins {
    remove java
}

到我的模块级别 build.gradle

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

apply plugin: 'com.google.protobuf'

android {
    compileSdkVersion 26
    ext.buildType =  ""
    defaultConfig {
        applicationId "com.my.appr"
        minSdkVersion 15
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            buildType = "Release"
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        debug {
            buildType = "Debug"
        }
    }
    sourceSets {
        debug.java.srcDirs += 'build/generated/source/proto/debug/java'
        debug.java.srcDirs += 'build/generated/source/proto/debug/grpc'
        debug.java.srcDirs += 'build/generated/source/proto/debug/javalite'
        release.java.srcDirs += 'build/generated/source/proto/release/java'
        release.java.srcDirs += 'build/generated/source/proto/release/grpc'
        release.java.srcDirs += 'build/generated/source/proto/release/javalite'
        main.proto.srcDirs += 'src/main/proto'
    }
    //preBuild.dependsOn(":generateDebugProto")
}


protobuf {
    protoc {
        artifact = 'com.google.protobuf:protoc:3.5.0'
    }
    plugins {
        javalite {
            artifact = "com.google.protobuf:protoc-gen-javalite:3.0.0"
        }
        grpc {
            artifact = 'io.grpc:protoc-gen-grpc-java:1.8.0' // CURRENT_GRPC_VERSION
        }
    }
    generateProtoTasks {
        all().each { task ->
            task.builtins {    ///////////////////////////////7
                remove java    // THIS IS THE SOLUTION      //
            }                  ///////////////////////////////
            task.plugins {
                javalite {}
                grpc {
                    // Options added to --grpc_out
                    option 'lite'
                }
            }
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation"org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
    implementation 'io.grpc:grpc-okhttp:1.8.0' // CURRENT_GRPC_VERSION
    implementation 'io.grpc:grpc-protobuf-lite:1.8.0' // CURRENT_GRPC_VERSION
    implementation 'io.grpc:grpc-stub:1.8.0' // CURRENT_GRPC_VERSION
    implementation 'javax.annotation:javax.annotation-api:1.2'
}


//preBuild.dependsOn ":generate"+buildType+"proto"

gRPC protobuf 未使用 kotlin 构建进行编译（Android Studio 3.0）

gRPC protobuf not compiling with kotlin builds (Android Studio 3.0)

java

android

protocol-buffers

gradle

android-studio