android - Android Studio Gradle Build Error无法合并dex

Question

我是新来的android studio。我已经制作了一个Java项目，该项目主要与SQLite db(在assets文件夹中)一起使用。我从Netbeans将此项目迁移到android studio。当我按Run键并选择一个仿真器时，Gradle Build Tasks开始执行，并出现错误消息:

    Error:Execution failed for task 
    ':app:transformDexArchiveWithExternalLibsDexMergerForDebug'.
    > java.lang.RuntimeException: 
    com.android.builder.dexing.DexArchiveMergerException: Unable to merge dex

控制台中的Complete错误输出显示:

    * What went wrong:
   Execution failed for task ':app:transformDexArchiveWithExternalLibsDexMergerForDebug'.
   > java.lang.RuntimeException: com.android.builder.dexing.DexArchiveMergerException: Unable to merge dex

   * Try:
   Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

   * Get more help at https://help.gradle.org

   BUILD FAILED in 39s

这是按“运行”后的堆栈跟踪

执行任务:[:app:assembleDebug]

    :app:preBuild UP-TO-DATE
    :app:preDebugBuild UP-TO-DATE
    :app:compileDebugAidl UP-TO-DATE
    :app:compileDebugRenderscript UP-TO-DATE
    :app:checkDebugManifest UP-TO-DATE
    :app:generateDebugBuildConfig UP-TO-DATE
    :app:prepareLintJar UP-TO-DATE
    :app:generateDebugResValues UP-TO-DATE
    :app:generateDebugResources UP-TO-DATE
    :app:mergeDebugResources UP-TO-DATE
    :app:createDebugCompatibleScreenManifests UP-TO-DATE
    :app:processDebugManifest
    :app:splitsDiscoveryTaskDebug UP-TO-DATE
    :app:processDebugResources
    :app:generateDebugSources
    :app:javaPreCompileDebug UP-TO-DATE
    :app:compileDebugJavaWithJavac UP-TO-DATE
    :app:compileDebugNdk NO-SOURCE
    :app:compileDebugSources UP-TO-DATE
    :app:mergeDebugShaders UP-TO-DATE
    :app:compileDebugShaders UP-TO-DATE
    :app:generateDebugAssets UP-TO-DATE
    :app:mergeDebugAssets UP-TO-DATE
    :app:transformClassesWithDexBuilderForDebug UP-TO-DATE
    :app:transformDexArchiveWithExternalLibsDexMergerForDebug FAILED 

网络上有很多解决方案，例如我已经拥有的multiDexEnabled true文件中的gradle.build文件。

更新这是我的gradle.build文件

    apply plugin: 'com.android.application'

   android {
       compileSdkVersion 26
       defaultConfig {
           applicationId "com.example.bcosta.myapplication"
           minSdkVersion 23
           targetSdkVersion 23
           versionCode 1
           versionName "1.0"
           testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
           multiDexEnabled = true
       }
       buildTypes {
           release {
               minifyEnabled false
               proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
           }
       }
   }

   dependencies {
       implementation fileTree(include: ['*.jar'], dir: 'libs')

       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'
          }

Answer 1

没有确定的解决方案，这似乎是一个常见问题。

尝试:

删除.gradle目录。

清理项目并重新构建。

如果这样不起作用，请尝试将以下内容添加到build.gradle中:

android {
dexOptions{
   jumboMode=true;
   javaMaxHeapSize "4g"
}
}

另外，尝试"file"->“使缓存无效/重新启动”