Conversion of apk files to swf file format

Android installation packages (.apk) generally do not contain documents, pictures, or any multimedia file so it is not possible to convert apk to swf, unless you meant to extract some Flash animation (.swf) out of the .apk package.

It might be possible that you were looking for an installation package for some kind of Android app converter. In such case, you can either try to find one using a proper conversion query like SWF to MP4, or browser Google Play to find the app you were looking for. Some users also look for a way to convert Android game to Flash game (hence why apk to swf conversion), but that's not something you do with a simple conversion, you would need some development tools for that.

Open APK file    Open SWF file