我的项目中有多个DEX文件定义错误。
我在build.gradle中也使用了这两个标签

dexOptions {
    preDexLibraries = false
}
defaultConfig {
    multiDexEnabled true

}

但还是有这个错误。
   Information:Gradle tasks [:app:assembleDebug]
Error:Error converting bytecode to dex:
Cause: com.android.dex.DexException: Multiple dex files define Landroid/support/design/widget/CoordinatorLayout$LayoutParams;
Error:com.android.dex.DexException: Multiple dex files define Landroid/support/design/widget/CoordinatorLayout$LayoutParams;
Error:  at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:661)
Error:  at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:616)
Error:  at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:598)
Error:  at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:171)
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.DexException: Multiple dex files define Landroid/support/design/widget/CoordinatorLayout$LayoutParams;

最佳答案

将库版本更新为“27.1.0solve the isssue for me”。

compile 'com.android.support:appcompat-v7:26.1.0'
compile 'com.android.support:design:26.1.0'
compile 'com.android.support:appcompat-v7:26.1.0'
compile 'com.android.support:mediarouter-v7:26.1.0'
compile 'com.android.support:recyclerview-v7:26.1.0'
compile 'com.android.support:cardview-v7:26.1.0'
compile 'com.android.support:support-v13:26.1.0'
compile 'com.android.support:support-v4:26.1.0'

到:
compile 'com.android.support:appcompat-v7:27.1.0'
compile 'com.android.support:design:27.1.0'
compile 'com.android.support:appcompat-v7:27.1.0'
compile 'com.android.support:mediarouter-v7:27.1.0'
compile 'com.android.support:recyclerview-v7:27.1.0'
compile 'com.android.support:cardview-v7:27.1.0'
compile 'com.android.support:support-v13:27.1.0'
compile 'com.android.support:support-v4:27.1.0'

08-05 11:51