现在必须显式声明注释处理器。编译类路径上的下列依赖项？

Question

下面是我的app.gradle

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.2"
    defaultConfig {
        applicationId "com.example.lifecycleawaredemo"
        minSdkVersion 15
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.core:core-ktx:1.0.2'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.2.0'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
    implementation 'androidx.lifecycle:lifecycle-compiler:2.0.0'

    def lifecyle_version = "1.1.1"
    implementation "android.arch.lifecycle:extensions:$lifecyle_version"
    implementation "android.arch.lifecycle:compiler:$lifecyle_version"
}

在我的建筑下面。Gradle

buildscript {
    ext.kotlin_version = '1.3.31'
    repositories {
        google()
        jcenter()

    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.4.2'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

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

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

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

Answer 1

首先，您似乎混淆了androidx生命周期依赖项。您正在使用androidx工件，因此可以删除以下部分：

def lifecyle_version = "1.1.1"
implementation "android.arch.lifecycle:extensions:$lifecyle_version"
implementation "android.arch.lifecycle:compiler:$lifecyle_version"

您只需要：

implementation 'androidx.lifecycle:lifecycle-compiler:2.0.0'

现在，关于错误，消息说lifecycle-compiler包含注释处理器，所以您应该将它们添加到annotationProcessor配置中。为此，在app.gradle的apply plugin部分添加以下行：

apply plugin: 'kotlin-kapt'

implementation 'androidx.lifecycle:lifecycle-compiler:2.0.0'

kapt 'androidx.lifecycle:lifecycle-compiler:2.0.0'