Android Gradle中packagingOptions选

* What went wrong:
Execution failed for task ':app:transformNativeLibsWithStripDebugSymbolForDebug'.

> A problem occurred starting process 'command 'D:\Users\sky\AppData\Local\Android\Sdk\ndk-bundle\toolchains\mips64el-linux-android-4.9\prebuilt\windows-x86_64\bin\mips64el-linux-android-strip''
Error:com.android.builder.merge.DuplicateRelativeFileException:
More than one file was found with OS independent path 'META-INF/DEPENDENCIES'
Execution failed for task ':app:transformNativeLibsWithMergeJniLibsForRelease'.

> More than one file was found with OS independent path 'lib/armeabi/libJniTest.so'

类似于这种编译打包时，找不到工具链的。由于NDK开发工具的包的问题导致如果不需要对应的架构可以直接设置

  packagingOptions {
        doNotStrip '*/mips/*.so'
        doNotStrip '*/mips64/*.so'
        doNotStrip '*/x86_64/*.so'
    }

这样就剔除了mips，mips64，x86_64架构，也就用不到对应的架构的工具链了。问题自然而解，如果必须要对应的架构那就下载完整的NDK开发工具包。

当然想打包时文件重复的问题也可以使用这个选项，常见的就是引入的so库重

• exclude 在打包时移除项目中的相关文件，不打入apk文件中

packagingOptions {
    exclude 'META-INF/ASL2.0'
    exclude 'META-INF/DEPENDENCIES.txt'
    exclude 'META-INF/LICENSE.txt'
    exclude 'META-INF/NOTICE.txt'
    exclude 'META-INF/NOTICE'
    exclude 'META-INF/LICENSE'
    exclude 'META-INF/DEPENDENCIES'
    exclude 'META-INF/notice.txt'
    exclude 'META-INF/license.txt'
    exclude 'META-INF/dependencies.txt'
    exclude 'META-INF/LGPL2.1'
    exclude 'META-INF/services/javax.annotation.processing.Processor'exclude 'META-INF/rxjava.properties'
}

• pickFirst 当有多个匹配项的时候匹配到第一个就可以了

 packagingOptions {
        pickFirst "lib/armeabi-v7a/libavdevice.so"
        pickFirst "lib/armeabi-v7a/libavcodec.so"
        pickFirst "lib/armeabi-v7a/libavfilter.so"
        pickFirst "lib/armeabi-v7a/libavformat.so"
        pickFirst "lib/armeabi-v7a/libavutil.so"
        pickFirst "lib/armeabi-v7a/libswresample.so"
        pickFirst "lib/armeabi-v7a/libswscale.so"
        pickFirst "lib/armeabi-v7a/libpostproc.so"
    }