F:\apk\>apktool
Apktool v1.3.1 - a tool for reengineering Android apk files
Copyright 2010 Ryszard Wi?niewski <brut.alll@gmail.com>
Apache License 2.0 (http://www.apache.org/licenses/LICENSE-2.0)

Usage: apktool [-v|--verbose] COMMAND [...]

COMMANDs are:

    d[ecode] [OPTS] <file.apk> [<dir>]
        Decode <file.apk> to <dir>.

        OPTS:

        -s, --no-src
            Do not decode sources.
        -r, --no-res
            Do not decode resources.
        -d, --debug
            Decode in debug mode. Check project page for more info.
        -f, --force
            Force delete destination directory.
        -t <tag>, --frame-tag <tag>
            Try to use framework files tagged by <tag>.

    b[uild] [OPTS] [<app_path>] [<out_file>]
        Build an apk from already decoded application located in <app_path>.

        It will automatically detect, whether files was changed and perform
        needed steps only.

        If you omit <app_path> then current directory will be used.
        If you omit <out_file> then <app_path>/dist/<name_of_original.apk>
        will be used.

        OPTS:

        -f, --force-all
            Skip changes detection and build all files.
        -d, --debug
            Build in debug mode. Check project page for more info.

    if|install-framework <framework.apk> [<tag>]
        Install framework file to your system.

For additional info, see: http://code.google.com/p/android-apktool/

F:\apk>apktool
'java' 不是内部或外部命令，也不是可运行的程序或批处理文件。