We welcome patches. On Fri, Feb 6, 2009 at 4:45 PM, Inderjeet Singh <inder...@gmail.com> wrote:
> > I dont think assets/ files are compressed all that great. For my app, > I was able to cut down the size of overall apk by almost 50% by using > GZipInputStream. I posted the numbers a while back. > > But now I am paying the cost of decompression while loading those assets. > > I hope the Android platform can improve the compression of the apk > file itself in a subsequent release. > > Thanks > Inder > > > On Wed, Feb 4, 2009 at 2:25 PM, Dianne Hackborn <hack...@android.com> > wrote: > > Oh btw there is one improvement we have in aapt for Cupcake to better > > compress .png image files. > > > > On Wed, Feb 4, 2009 at 2:24 PM, Dianne Hackborn <hack...@android.com> > wrote: > >> > >> Yep I think they are pretty compact in their current form. Note that > the > >> resource table itself is not stored compressed in the .apk, so that it > can > >> be mmapped into the process, which is a pretty important optimization > for > >> many cases. > >> > >> You can imagine doing some additional processing of the images to > combine > >> them into a few larger uber-images (we've done this kind of thing on > >> previous platforms), but doing that well to the point where it is > actually a > >> win is not trivial, and it can easily lead to situations where you use > way > >> more memory than needed because you need to load the entire bitmap even > >> though you only use a few things in it. Imagine something displaying > the > >> icons of all of the applications for example, loading a huge bitmap from > >> each of the apps to pull out one little icon. > >> > >> If you want to work on further optimizing the data structures and code, > >> we'd be happy to talk about it on android-framework and consider such > >> patches. > >> > >> On Wed, Feb 4, 2009 at 10:06 AM, FranckLefevre <flas...@gmail.com> > wrote: > >>> > >>> > >>> Dear Raja, > >>> > >>> I think that compressing resources in APK would not be that convenient > >>> for two reasons: > >>> > >>> 1- when resources are actual pictures, they are usually already > >>> compressed (using GIF, JPG, PNG,...) and trying to ZIP them does not > >>> significantly reduce their size > >>> 2- APK resource files are offered through the framework (grep > >>> "assets" in the source code...) that "maps" these APK files, allowing > >>> to get a pointer to them. Compressing would lead to a buffer > >>> duplication that may impact memory and speed. > >>> > >>> IMHO, this APK format is quite smart and convenient as it is... > >>> > >>> Rgds. > >>> > >>> Franck > >>> > >>> > >>> > >>> > >>> > >>> On Feb 3, 11:44 am, Raja Nagendra Kumar <nagendra.r...@gmail.com> > >>> wrote: > >>> > When we open up the .apk file in winzip (as it is a jar file), we see > >>> > the classes are compressed and stored as one file. However the > >>> > resources are taken as is. Would it not be a nice approach to > compress > >>> > all the resources (specially if all the application has many images) > >>> > and store it as one file, as this could further bring down the .apk > >>> > size. I understand it needs more runtime memory though.. Are there > any > >>> > options to pack the resources this way already.. > >>> > > >>> > As Android seems to run j2se.. I am assuming that such kind of > runtime > >>> > memory is not an issue. > >>> > > >>> > Regards, > >>> > Raja Nagendra Kumar, > >>> > C.T.Owww.tejasoft.com > >>> > >> > >> > >> > >> -- > >> Dianne Hackborn > >> Android framework engineer > >> hack...@android.com > >> > >> Note: please don't send private questions to me, as I don't have time to > >> provide private support. All such questions should be posted on public > >> forums, where I and others can see and answer them. > >> > > > > > > > > -- > > Dianne Hackborn > > Android framework engineer > > hack...@android.com > > > > Note: please don't send private questions to me, as I don't have time to > > provide private support. All such questions should be posted on public > > forums, where I and others can see and answer them. > > > > > > > > > > > > > -- Dianne Hackborn Android framework engineer hack...@android.com Note: please don't send private questions to me, as I don't have time to provide private support. All such questions should be posted on public forums, where I and others can see and answer them. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
