The CompileOptions.bootClasspath property has been deprecated and is scheduled to be removed in Gradle 5.0. Please use the CompileOptions.bootstrapClasspath property instead.
NDK is missing a "platforms" directory.
If you are using NDK, verify the ndk.dir is set to a valid NDK directory.  It is currently set to D:\env\android_sdk\ndk-bundle.
If you are not using NDK, unset the NDK variable from ANDROID_NDK_HOME or local.properties to remove this warning.

NDK is missing a "platforms" directory.
If you are using NDK, verify the ndk.dir is set to a valid NDK directory.  It is currently set to D:\env\android_sdk\ndk-bundle.
If you are not using NDK, unset the NDK variable from ANDROID_NDK_HOME or local.properties to remove this warning.


FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':zjdroid'.
> java.lang.NullPointerException (no error message)

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

解決辦法編輯local.properties修改目錄如

ndk.dir=D\:\\env\\android_sdk\\ndk-bundle\\android-ndk-r17b

 D:\env\android_sdk\ndk-bundle\android-ndk-r17 的目錄

2018/06/13  12:37    <DIR>          .
2018/06/13  12:37    <DIR>          ..
2018/06/13  12:37    <DIR>          build
2018/06/13  12:37    <DIR>          meta
2018/06/13  12:37    <DIR>          platforms
2018/06/13  12:37    <DIR>          prebuilt
2018/06/13  12:37    <DIR>          python-packages
2018/06/13  12:37    <DIR>          shader-tools
2018/06/13  12:37    <DIR>          simpleperf
2018/06/13  12:37    <DIR>          sources
2018/06/13  12:37    <DIR>          sysroot
2018/06/13  12:37    <DIR>          toolchains
2018/06/13  12:37    <DIR>          wrap.sh
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