错误:程序类型已存在:android.arch.lifecycle.LiveData

Question

当我按下Android Studio中的播放按钮时,我的应用程序会编译,但会显示此错误(编辑):

错误:程序类型已存在:android.arch.lifecycle.LiveData

(完整日志)

我试过删除.gradle文件夹,然后去Build > Clean Project和Build > Rebuild Project.但是,它不起作用.我也尝试删除源代码,然后再次克隆git并将文件夹导入Android Studio.但是,它仍会产生该错误.

这是我的应用程序app/build.gradle:

Error:Program type already present: android.arch.lifecycle.LiveData

Answer 1

显然,这是预期的行为:

com.firebaseui:firebase-ui-firestore:3.1.0依赖于android.arch.lifecycle:extensions:1.0.0-beta1.切换到版本3.2.2通过使用支持库27.1.0构建的Lifecycle 1.1库来修复此问题.- 问题跟踪器

对我来说,删除firebase-ui依赖项解决了这个问题,因为我甚至没有首先使用该库.

Answer 2

当我提出支持库版本时,我今天遇到了同样的问题.

尝试用'27 .0.2' 替换所有 '27 .1.0'

后来我确实设法通过升级其他库来删除错误.这是我目前的工作状态:root gradle:

buildscript {
    ext.kotlin_version = '1.2.21'
    ext.support_version = '27.1.0'
    ext.anko_version = '0.10.4'
    ext.android_plugin_version = '3.0.1'
    ext.google_services_version = '11.8.0'

    repositories {
        google()
        jcenter()
        maven { url 'https://maven.fabric.io/public' }
    }

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

        classpath 'com.android.tools.build:gradle:3.1.0-beta4'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
        classpath 'com.google.gms:google-services:3.1.1'
    }
}

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

////////////////// app gradle libraries:

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation('com.crashlytics.sdk.android:crashlytics:2.9.1@aar') {
        transitive = true
    }

    // kotlin:
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    implementation "org.jetbrains.anko:anko-common:$anko_version"
    implementation "org.jetbrains.anko:anko-commons:$anko_version"
    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:0.22.3'

    // support libraries:
    implementation "com.android.support:recyclerview-v7:$support_version"
    implementation "com.android.support:support-v4:$support_version"
    implementation "com.android.support:design:$support_version"
    implementation "com.android.support:appcompat-v7:$support_version"
    implementation "com.android.support:cardview-v7:$support_version"
    implementation "com.android.support:support-vector-drawable:$support_version"

    // misc:
    implementation 'com.github.d-max:spots-dialog:0.7@aar'
    implementation 'com.squareup.picasso:picasso:2.5.2'
    implementation 'com.android.support.constraint:constraint-layout:1.1.0-beta5'
    implementation 'com.backendless:backendless:4.4.0'
    implementation 'io.nlopez.smartlocation:library:3.3.3'

    // Google services:
    implementation "com.google.firebase:firebase-core:$google_services_version"
    implementation "com.google.firebase:firebase-auth:$google_services_version"
    implementation 'com.firebaseui:firebase-ui-auth:3.2.2'

    implementation "com.google.android.gms:play-services-location:$google_services_version"
    implementation "com.google.android.gms:play-services-auth:$google_services_version"

    implementation('com.google.api-client:google-api-client:1.23.0') {
        exclude group: 'com.google.code.findbugs', module: 'jsr305'
    }
}

///////////////

我还将graddle-wrapper.properties升级为:

#Wed Dec 20 15:08:34 CET 2017
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip

Answer 3

这篇文章是非常相似的错误的顶级搜索结果:"程序类型已存在:android.arch.lifecycle.ViewModelProvider $ Factory "

我的项目使用Room和LiveData,但不使用firebase.以下更改删除了错误:

从:

implementation 'android.arch.persistence.room:runtime:1.0.0'
annotationProcessor 'android.arch.persistence.room:compiler:1.0.0'
implementation 'android.arch.lifecycle:extensions:1.0.0'
annotationProcessor 'android.arch.lifecycle:compiler:1.0.0'

至:

implementation 'android.arch.persistence.room:runtime:1.1.1'
annotationProcessor 'android.arch.persistence.room:compiler:1.1.1'
implementation 'android.arch.lifecycle:extensions:1.1.1'
annotationProcessor 'android.arch.lifecycle:compiler:1.1.1'

---更新的答案---

我之前的回答是为了解决这个错误.但是,我认为使用最佳实践再次呈现它是值得的:

应用级build.gradle文件:

// Room components
implementation "android.arch.persistence.room:runtime:$rootProject.roomVersion"
annotationProcessor "android.arch.persistence.room:compiler:$rootProject.roomVersion"
androidTestImplementation "android.arch.persistence.room:testing:$rootProject.roomVersion"

// Lifecycle components
implementation "android.arch.lifecycle:extensions:$rootProject.archLifecycleVersion"
annotationProcessor "android.arch.lifecycle:compiler:$rootProject.archLifecycleVersion"

项目级build.gradle文件:

ext {
   roomVersion = '1.1.1'
   archLifecycleVersion = '1.1.1'
}

参考:https:
//codelabs.developers.google.com/codelabs/android-room-with-a-view/#2