Btw, on your device go to Manage Applications to see a list of how much internal storage each app is taking. This should give you some perspective on how much space is reasonable. Also Settings > Storage tells you the total available and used space on internal storage.
On Thu, Apr 14, 2011 at 11:10 AM, Dianne Hackborn <hack...@android.com>wrote: > 1MB is perfectly fine to store on internal storage. There is NO reason to > avoid internal storage for such a file. Just write a file there and don't > worry about it. For some devices, 10MB may be getting a *little* large... > but if this is a temporary file, it shouldn't be an issue. > > > On Thu, Apr 14, 2011 at 1:45 AM, Kacee <komal...@gmail.com> wrote: > >> Thanks Dianne... I think I have not put it in write way. >> In my particular case, >> SharedPreferences, Database are not applicable due to large file(.xml, >> html,etc) size >> >> My temp files may consume 1MB to say 10MB space. However, app deletes >> them as soon as they r not needed. Since temp filesize is little more, >> i am not sure if its a good option to store on device internal >> Storage. Hence one option left is SDCARD, but there to protect data, >> encryption needs to be applied...which probably i'll be doing now. >> >> >> >> On Apr 14, 12:40 pm, Dianne Hackborn <hack...@android.com> wrote: >> > You are mixing up all kinds of things. >> > >> > Each application has a directory on internal storage where its *private* >> > data goes. This is shared with all apps on internal storage; there is >> no >> > per-app quota, though if the overall storage starts getting low a >> > notification will displayed to the user which takes them to a list of >> apps >> > sorted by how much storage each one is taking, for them to deal with the >> > culprits. >> > >> > SharedPreferences is *one* way to put data in your private internal >> storage >> > area. It is in no way shape or form intended for large amounts of data. >> It >> > is for small settings data. >> > >> > Databases are another way to put data in your private internal storage. >> > This also is not intended for big blobs of binary data, but works well >> for >> > large amounts (megabytes) of structured data. >> > >> > Or you can just put whatever files you want in your internal storage, in >> > whatever format you want. >> > >> > The sd card / external storage is generally for *shared* data that does >> not >> > need to be protected from other apps. That said, you *can* protect it >> > basically as well as you can protect your private data if you do some >> work >> > -- for example generate a random key that you put in your internal >> storage >> > (so other apps can't get to it) which you use to encrypt the data on >> > external / sd card storage. This is basically how apps on SD card works >> -- >> > the system generates a random key for created encrypted filesystems on >> the >> > SD card in which it installs an application. >> > >> > >> > >> > On Thu, Apr 14, 2011 at 12:17 AM, Kacee <komal...@gmail.com> wrote: >> > > Yes to avoid memory issues later with preferences, we are storing temp >> > > files(in MB) on sdcard.... which then crops up problems of encryption/ >> > > file permissions/ etc. >> > > Aah... we can not expect desktop facilities from a device :) >> > >> > > On Apr 14, 11:25 am, Nikolay Elenkov <nikolay.elen...@gmail.com> >> > > wrote: >> > > > On Thu, Apr 14, 2011 at 3:07 PM, Kacee <komal...@gmail.com> wrote: >> > > > > I was wondering if there is any size limit for storing on shared >> > > > > preferences. Could not find any such info on >> developer.android.com. Is >> > > > > anyone aware of such space limit on internal storage ? >> > >> > > > Interesting question. Since each app is a different user, you'd have >> to >> > > use >> > > > quotas to do this. I haven't checked, but I doubt Android's kernel >> has >> > > support >> > > > for this. So unless the frameworks is imposing some restrictions >> (does >> > > it?), >> > > > your xml files can grow until there is internal storage left. >> Depending >> > > on how >> > > > parsing is done, though, you might run into memory problems with big >> > > > preferences files. You'd better use separate files and/or a database >> if >> > > you >> > > > need to store a lot of data. >> > >> > > -- >> > > 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 >> > >> > -- >> > 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, and so won't reply to such e-mails. 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 >> > > > > -- > 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, and so won't reply to such e-mails. 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, and so won't reply to such e-mails. 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
