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
