Question

我是Android新手，我尝试使用本教程（只是Room数据库部分）：here。

当我执行我的应用时，我收到以下错误：

错误：任务＆＃39;：app：transformDexArchiveWithExternalLibsDexMergerForDebug＆＃39;执行失败。 > com.android.builder.dexing.DexArchiveMergerException：无法合并dex

在我按this修复另一个错误（关于Room的架构导出目录）后，似乎出现了这个问题。我曾尝试使用multiDexEnabled true关于修复此问题的this post's建议并使用// Top-level build file where you can add configuration options common to all sub-projects/modules. buildscript { repositories { google() jcenter() } dependencies { classpath 'com.android.tools.build:gradle:3.0.0' // NOTE: Do not place your application dependencies here; they belong // in the individual module build.gradle files } } ext { buildToolsVersion = "25.0.2" supportLibVersion = "25.3.1" archRoomVersion = "1.0.0-alpha1" } allprojects { repositories { google() jcenter() maven { url 'https://maven.google.com' } //needed for Room } } task clean(type: Delete) { delete rootProject.buildDir }进行清理/重新构建，但它无法正常工作。

任何建议都将不胜感激。这是我在这里的第一篇文章，所以如果我做错了什么，请告诉我。

Project gradle：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.example.myname.room_example"
        minSdkVersion 21
        targetSdkVersion 26
        multiDexEnabled true
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

        javaCompileOptions {
            annotationProcessorOptions {
                arguments = ["room.schemaLocation": "$projectDir/schemas".toString()] // Room schema
            }
        }

    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    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 'com.android.support:multidex:1.0.2'

    implementation "android.arch.persistence.room:runtime:1.0.0-alpha1"
    annotationProcessor "android.arch.persistence.room:compiler:1.0.0-alpha1"
    implementation 'com.android.support:support-annotations:27.0.0'
}

App Gradle：

print(obj)

Answer 1

将buildToolsVersion和supportLibVersion更新为以下代码中的最新内容。

ext {
buildToolsVersion = "25.0.2"
supportLibVersion = "25.3.1"
archRoomVersion = "1.0.0-alpha1"

}

然后清理并重建项目以查看它是否有效。

Answer 2

我找到了解决方案。替换：

"android.arch.persistence.room:runtime:1.0.0-alpha1"

和

"android.arch.persistence.room:compiler:1.0.0-alpha1"

带

"android.arch.persistence.room:runtime:1.0.0"

和

"android.arch.persistence.room:compiler:1.0.0"

无法合并dex - gradle 3.0.0

2 个答案: