android - 为什么添加 google firebase 会导致 Dex 错误？

Question

添加

implementation 'com.google.firebase:firebase-core:11.8.0'

我的模块 gradle 文件给我错误提示我的项目中有超过 64K 的方法。

我的猜测是我以某种方式实现了整个 google play 服务，尽管添加了

implementation 'com.google.android.gms:play-services-maps:11.8.0'

或

implementation 'com.google.android.gms:play-services-location:11.8.0'

不要给我任何错误。

格拉德尔:

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 26
    buildToolsVersion "26.0.2"
    defaultConfig {
        applicationId "se.workshop.collect"
        minSdkVersion 21
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        vectorDrawables.useSupportLibrary = true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation 'uk.co.chrisjenx:calligraphy:2.3.0'
    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'
    implementation 'com.android.support:support-v4:26.1.0'
    implementation 'com.android.support:recyclerview-v7:26.1.0'
    implementation 'uk.co.chrisjenx:calligraphy:2.3.0'
    implementation 'com.google.android.gms:play-services-maps:11.8.0'
    implementation 'com.google.android.gms:play-services-location:11.8.0'
    implementation 'com.google.firebase:firebase-core:11.8.0'
    implementation "com.android.support:recyclerview-v7:26.1.0"                //Recycler View Support
    implementation "com.android.support:cardview-v7:26.1.0"                //Recycler View Support
    implementation 'com.squareup.okhttp3:okhttp:3.9.0'
    implementation 'com.google.code.gson:gson:2.8.2'
    implementation "com.fasterxml.jackson.module:jackson-module-kotlin:2.9.0"
    implementation 'com.karumi:dexter:4.2.0'
    implementation 'com.android.support:design:26.1.0'
    implementation 'com.android.support:support-vector-drawable:26.1.0'
    implementation group: 'org.jetbrains.kotlin', name: 'kotlin-reflect', version:"$kotlin_version"
    testImplementation 'junit:junit:4.12'
    androidTestImplementation('com.android.support.test.espresso:espresso-core:3.0.1', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })

}

和错误:

Error:The number of method references in a .dex file cannot exceed 64K.
Learn how to resolve this issue at https://developer.android.com/tools/building/multidex.html
Error:com.android.dex.DexIndexOverflowException: method ID not in [0, 0xffff]: 65536
Error:  at com.android.dx.merge.DexMerger$8.updateIndex(DexMerger.java:565)
Error:  at com.android.dx.merge.DexMerger$IdMerger.mergeSorted(DexMerger.java:276)
Error:  at com.android.dx.merge.DexMerger.mergeMethodIds(DexMerger.java:574)
Error:  at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:166)
Error:  at com.android.dx.merge.DexMerger.merge(DexMerger.java:198)
Error:  at com.android.builder.dexing.DexArchiveMergerCallable.call(DexArchiveMergerCallable.java:61)
Error:  at com.android.builder.dexing.DexArchiveMergerCallable.call(DexArchiveMergerCallable.java:36)
Error:  at java.util.concurrent.ForkJoinTask$AdaptedCallable.exec(ForkJoinTask.java:1424)
Error:  at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
Error:  at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
Error:  at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
Error:  at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)
Error:Execution failed for task ':app:transformDexArchiveWithDexMergerForDebug'.
> com.android.build.api.transform.TransformException: com.android.dex.DexIndexOverflowException: method ID not in [0, 0xffff]: 65536
Information:BUILD FAILED in 13s

Answer 1

对主题中所述问题的简单回答是，您添加的依赖项只是将方法总数推到了 64K 以上，如您在错误消息中所见。听起来你假设它不应该，但显然它是。请记住，firebase-core 还引入了 firebase-analyics 和其他一些库，因此当您添加它时，您实际上获得的不仅仅是 firebase-core。

无论如何，你应该enable multidex在您的构建中防止在添加更多库时出现此错误。