Thanks for the clarifications Dianne.
On Sat, Dec 26, 2009 at 11:56 PM, Dianne Hackborn <[email protected]>wrote: > On Fri, Dec 25, 2009 at 10:14 PM, Android Development <[email protected] > > wrote: > >> 1. Are these preferences shared across android applications or only within >> the given application ? I saw a note in the documentation that read: >> Note: currently this class does not support use across multiple processes. >> This will be added later. >> > > It is entirely per-application. This comment is in reference to accessing > it from multiple processes in your application, if you do that. > > So i assume that this is not possible (across application interaction) but >> might be made possible in future releases ? >> > > Shared preferences are entirely by definition owned by the application, and > will never be available to other applications. > > >> 2. Are there any best practices on what should be inserted in the >> SharedPreferences (if any) from a performance perspective (fast lookups) ? >> > > As little as possible? Not sure what else you are looking for here. The > less there is, the faster it will be. > > >> 3. Is the data stored in SharedPreferences secure ? Can I store passwords, >> license keys etc in it ? >> > > They are stored on disk without encryption, but under your uid. You can > decide how comfortable you are with the things you are storing. > > >> 4. Shared Preferences data becomes persistent once committed. What is the >> persistence scope ? Is the data persistent across application re-start ? >> > > It is persistent until the application's persistent data is erased -- i.e., > device wiped, or app and data uninstalled. > > -- > Dianne Hackborn > Android framework engineer > [email protected] > > 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 [email protected] > To unsubscribe from this group, send email to > [email protected]<android-developers%[email protected]> > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
