I am using .pvr files in my Android game. But when compressing it using Zipalign, the size of .pvr files are no change (another type of file worked well)
I tried to use the newest Zipalign tool, change flags
tools/windows/zipalign -v -f 4 C:_Working\Game.apk release_apk\Game.apk
The zipalign tool is not about compressing but about "aligning" elements in the zip file, which means moving them at a position in the zip file which is a multiple of bytes of the value you give (in this case 4 -- which means, every uncompressed element is located at an offset multiple of 4). Compression is completely orthogonal to zip-aligning.
Depending on what tool you use to build your APK, some build systems may keep some files uncompressed, so you should look at the documentation.
Another possibility is that the .pvr file is already compressed in itself so zipping it brings little gain in size.
