Error:Execution failed for task ':app:transformResourcesWithMergeJavaResForDebug'. > com.android.build.api.transform.TransformException: com.android.builder.packaging.DuplicateFileException: Duplicate

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我引用compile 'com.squareup.retrofit2:converter-jackson:2.1.0'Gradle没有错误，运行APP就出了这个error。

错误日志：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

解决方法如下：

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android { compileSdkVersion 24 buildToolsVersion "24.0.3" defaultConfig { applicationId "com.edwin.xxxx" minSdkVersion 19 targetSdkVersion 24 versionCode 1 versionName "1.0" testInstrumentationRunner " android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), ' proguard-rules.pro' } }** packagingOptions{ exclude 'META-INF/NOTICE' // will not include NOTICE file exclude 'META-INF/LICENSE' // will not include LICENSE file // as noted by @Vishnuvathsan you may also need to include // variations on the file name. It depends on your dependencies. // Some other common variations on notice and license file names exclude 'META-INF/notice' exclude 'META-INF/notice.txt' exclude 'META-INF/license' exclude 'META-INF/license.txt'**** }**}

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