com/xd/testcommandpattern/DownloadFragment.java
 com.xd.testcommandpattern.DownloadFragment
com/xd/testcommandpattern/DownloadService.java
 com.xd.testcommandpattern.DownloadService
com/xd/testcommandpattern/BuildConfig.java
 com.xd.testcommandpattern.BuildConfig
com/xd/testcommandpattern/MainActivity.java
 com.xd.testcommandpattern.MainActivity