android混淆(Obfuscate)

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?并修改target dex

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<!--?Convert?this?project's?.class?files?into?.dex?files.?-->??<target?name="dex"?depends="compile,optimize">??????<echo>Converting?compiled?files?and?external?libraries?into?${out-folder}/${dex-file}...</echo>??????<apply?executable="${dx}"?failonerror="true"?parallel="true">??????????<arg?value="--dex"?/>??????????<arg?value="--output=${intermediate-dex-location}"?/>??????????<arg?path="${outdir-classes-location}"?/>??????????<fileset?dir="${external-libs-folder}"?includes="*.jar"/>??????</apply>??</target>??