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Since version 2.0 and on, CrossDict will no longer bundle the dictionary data. This can make CrossDict easier to upgrade; also it paves the way for CrossDict to support switching among multiple dictionaries.
To copy the dictionary data, you need run this APK only once. After that, CrossDict should be able to run, and you can safely uninstall this package.
The source code for this package is at the same github project as CrossDict itself, https://github.com/baohaojun/BTAndroidWebViewSelection, but with the branch named crossdict-gcide. In http://baohaojun.github.com/crossdict-gcide.html I will explain how to extract the GCIDE data for CrossDict.