项目报错：Duplicate files copied in APK META-INF/LICENSE

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报错如下：

Error:Execution failed for task ':app:transformResourcesWithMergeJavaResForDebug'.> com.android.build.api.transform.TransformException: com.android.builder.packaging.DuplicateFileException: Duplicate files copied in APK META-INF/LICENSE> com.android.build.api.transform.TransformException: com.android.builder.packaging.DuplicateFileException: Duplicate files copied in APK META-INF/DEPENDENCIES> com.android.build.api.transform.TransformException: com.android.builder.packaging.DuplicateFileException: Duplicate files copied in APK META-INF/ASL2.0    File1: D:\Users\Administrator\AndroidStudioProjects\Njb\app\libs\httpclient-4.3.3.jar    File2: D:\Users\Administrator\AndroidStudioProjects\Njb\app\libs\httpcore-4.3.2.jar    File3: D:\Users\Administrator\AndroidStudioProjects\Njb\app\libs\httpmime-4.3.jar    File4: D:\Users\Administrator\AndroidStudioProjects\Njb\app\libs\jackson-core-asl-1.8.9.jar    File5: D:\Users\Administrator\AndroidStudioProjects\Njb\app\libs\jackson-mapper-asl-1.8.9.jar

原因：

添加的依赖jar包重复。

解决方法：

app.build.gradle中添加：

    packagingOptions {        exclude 'META-INF/LICENSE'        exclude 'META-INF/DEPENDENCIES'        exclude 'META-INF/ASL2.0'    }

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