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打release包时出现transformNativeLibsWithStripDebugSymbolForRelease异常：
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:transformNativeLibsWithStripDebugSymbolForAppRelease'.
...
at java.lang.Thread.run(Thread.java:745)
Caused by: org.gradle.process.internal.ExecException: A problem occurred starting process 'command 'C:/Users/tlanyan/AppData/Local/Android/Sdk/ndk-bundle/toolchains/mips64el-linux-android-4.9/prebuilt/windows-x86_64/bin/mips64el-linux-android-strip''
at org.gradle.process.internal.DefaultExecHandle.setEndStateInfo(DefaultExecHandle.java:198)
at org.gradle.process.internal.DefaultExecHandle.failed(DefaultExecHandle.java:329)
at org.gradle.process.internal.ExecHandleRunner.run(ExecHandleRunner.java:86)
... 5 more
Caused by: net.rubygrapefruit.platform.NativeException: Could not start 'C:/Users/tlanyan/AppData/Local/Android/Sdk/ndk-bundle/toolchains/mips64el-linux-android-4.9/prebuilt/windows-x86_64/bin/mips64el-linux-android-strip'
at net.rubygrapefruit.platform.internal.DefaultProcessLauncher.start(DefaultProcessLauncher.java:27)
at net.rubygrapefruit.platform.internal.WindowsProcessLauncher.start(WindowsProcessLauncher.java:22)
at net.rubygrapefruit.platform.internal.WrapperProcessLauncher.start(WrapperProcessLauncher.java:36)
at org.gradle.process.internal.ExecHandleRunner.run(ExecHandleRunner.java:68)
... 5 more
Caused by: java.io.IOException: Cannot run program "C:/Users/tlanyan/AppData/Local/Android/Sdk/ndk-bundle/toolchains/mips64el-linux-android-4.9/prebuilt/windows-x86_64/bin/mips64el-linux-android-strip" (in directory "E:/Demos/app/android/app"): CreateProcess error=2, The system cannot find the file specified
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
at net.rubygrapefruit.platform.internal.DefaultProcessLauncher.start(DefaultProcessLauncher.java:25)
... 8 more
Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified
at java.lang.ProcessImpl.create(Native Method)
at java.lang.ProcessImpl.<init>(ProcessImpl.java:386)
at java.lang.ProcessImpl.start(ProcessImpl.java:137)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
... 9 more
上网查教程，许多博客中说的升级gradle版本、修改sdk版本等未能解决问题。
卸载ndk是最后的选择，但不愿意为了一个项目作出这么大的牺牲。仔细看错误日志，发现情况和网上教程不同：网上教程解决的是NullException问题，而我是IoException。于是根据transformNativeLibsWithStripDebugSymbolForRelease和no such file or directory两个关键词再次上网搜索，终于在StackOverflow上找到解决办法：在build.gradle配置中增加不trip项：
packagingOptions{
doNotStrip '*/mips/*.so'
}
新增配置后再次打包，问题解决。