打Release包报错：Type BuildConfig is defined multiple times

ERROR:D:\AndroidProjects\my-project\android\baselib\build\.transforms\93c66b756e0e533a55c72ad11a151942\transformed\classes\classes.dex: D8: Type com
.xxx.baselib.BuildConfig is defined multiple times: D:\AndroidProjects\my-project\android\baselib\build\.transforms\93c66b756e0e533a55c72ad11a15
1942\transformed\classes\classes.dex, D:\AndroidProjects\my-project\android\app\build\intermediates\external_libs_dex\release\mergeExtDexRelease\cla
sses2.dex
com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives:
Learn how to resolve the issue at https://developer.android.com/studio/build/dependencies#duplicate_classes.
Type com.iflytek.baselib.BuildConfig is defined multiple times: D:\AndroidProjects\my-project\android\baselib\build\.transforms\93c66b756e0e533a55c7
2ad11a151942\transformed\classes\classes.dex, D:\AndroidProjects\my-project\android\app\build\intermediates\external_libs_dex\release\mergeExtDexRel
ease\classes2.dex
        at com.android.builder.dexing.D8DexArchiveMerger.getExceptionToRethrow(D8DexArchiveMerger.java:151)
        at com.android.builder.dexing.D8DexArchiveMerger.mergeDexArchives(D8DexArchiveMerger.java:138)
        at com.android.build.gradle.internal.tasks.DexMergingWorkAction.merge(DexMergingTask.kt:863)
        at com.android.build.gradle.internal.tasks.DexMergingWorkAction.run(DexMergingTask.kt:809)
        at com.android.build.gradle.internal.profile.ProfileAwareWorkAction.execute(ProfileAwareWorkAction.kt:74)
        at org.gradle.workers.internal.DefaultWorkerServer.execute(DefaultWorkerServer.java:63)
        at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1.create(NoIsolationWorkerFactory.java:66)
        at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1.create(NoIsolationWorkerFactory.java:62)
        at org.gradle.internal.classloader.ClassLoaderUtils.executeInClassloader(ClassLoaderUtils.java:97)
        at org.gradle.workers.internal.NoIsolationWorkerFactory$1.lambda$execute$0(NoIsolationWorkerFactory.java:62)
        at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:44)
        at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:41)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:200)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:195)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:75)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:68)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:153)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:68)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:62)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.lambda$call$2(DefaultBuildOperationExecutor.java:79)
        at org.gradle.internal.operations.UnmanagedBuildOperationWrapper.callWithUnmanagedSupport(UnmanagedBuildOperationWrapper.java:54)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:79)
        at org.gradle.workers.internal.AbstractWorker.executeWrappedInBuildOperation(AbstractWorker.java:41)
        at org.gradle.workers.internal.NoIsolationWorkerFactory$1.execute(NoIsolationWorkerFactory.java:59)
        at org.gradle.workers.internal.DefaultWorkerExecutor.lambda$submitWork$2(DefaultWorkerExecutor.java:206)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runExecution(DefaultConditionalExecutionQueue.java:214)
        at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runBatch(DefaultConditionalExecutionQueue.java:164)
        at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.run(DefaultConditionalExecutionQueue.java:131)
        at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
        at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:61)
        at java.base/java.lang.Thread.run(Thread.java:834)

大意就是两个.dex文件都有这个com.xxx.baselib.BuildConfig文件，冲突了。无论怎么clean，rebuild，invalidate Cache，重启电脑也都不行。最终在这里找到答案。

1.大部分说的一种情况是不同的module使用了相同的包名，我全局搜索了包名，确定每个module的包名都是唯一的。

2.不同的module存在对同一个module的引用，然后app模块引用了这些module，冲突了。采用以下方式排除共同引用的公共库依赖。

dependencies {
    ...
    implementation(project(':react-native-jitsi-meet')) {
        ...
        exclude group: 'com.facebook.react',module:'react-native-linear-gradient' // <<<---- this line was added
    }
}

方法2对我起作用了，打包成功。