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. -- 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
