tasks.withType(Dex) { dexTask ->
def command = [] as List
command << '--minimal-main-dex'
command << '--set-max-idx-number=50000'
dexTask.setAdditionalParameters(command)
}
我从互联网上复制这段代码（例如Is there a way to limit method amount in main dex file while using MultiDex feature in Android Studio），直到昨天才这样。我也使用svn来比较两个版本的差异。（但没有任何改变，它只是不会以某种方式工作。）
gradle输出的错误是：
--minimal-main-dex is only supported in combination with --multi-dex and --main-dex-list
usage:
dx --dex [--debug] [--verbose] [--positions=<style>] [--no-locals]
[--no-optimize] [--statistics] [--[no-]optimize-list=<file>] [--no-strict]
[--keep-classes] [--output=<file>] [--dump-to=<file>] [--dump-width=<n>]
[--dump-method=<name>[*]] [--verbose-dump] [--no-files] [--core-library]
[--num-threads=<n>] [--incremental] [--force-jumbo] [--no-warning]
[--multi-dex [--main-dex-list=<file> [--minimal-main-dex]]
[--input-list=<file>]
[<file>.class | <file>.{zip,jar,apk} | <directory>] ...
Convert a set of classfiles into a dex file, optionally embedded in a
jar/zip. Output name must end with one of: .dex .jar .zip .apk or be a directory.
Positions options: none, important, lines.
--multi-dex: allows to generate several dex files if needed. This option is
exclusive with --incremental, causes --num-threads to be ignored and only
supports folder or archive output.
--main-dex-list=<file>: <file> is a list of class file names, classes defined by
those class files are put in classes.dex.
--minimal-main-dex: only classes selected by --main-dex-list are to be put in
the main dex.
--input-list: <file> is a list of inputs.
Each line in <file> must end with one of: .class .jar .zip .apk or be a directory.
dx --annotool --annotation=<class> [--element=<element types>]
[--print=<print types>]
dx --dump [--debug] [--strict] [--bytes] [--optimize]
[--basic-blocks | --rop-blocks | --ssa-blocks | --dot] [--ssa-step=<step>]
[--width=<n>] [<file>.class | <file>.txt] ...
Dump classfiles, or transformations thereof, in a human-oriented format.
dx --find-usages <file.dex> <declaring type> <member>
Find references and declarations to a field or method.
declaring type: a class name in internal form, like Ljava/lang/Object;
member: a field or method name, like hashCode
dx -J<option> ... <arguments, in one of the above forms>
Pass VM-specific options to the virtual machine that runs dx.
dx --version
Print the version of this tool (1.11).
dx --help
Print this message.
Error:Execution failed for task ':app:dexDevDebug'.
> com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.8.0_65\bin\java.exe'' finished with non-zero exit value 1