I had a similar issue with storing temporary images (saving color- corrected images).
It turned out that storing a temp image (just plain binary data; a large array of int-s (ARGB)) on the SD-card was the fastest (still slow, though). Storing it on the phone, the cache (getCacheDir) or data (getFilesDir), was way slower (about 2 times for writing) than storing it on the SD-card. Note that i have a class-6 SD-card in my phone. Another reason to use the SD-card instead of the cache is the limited amount of phone-memory. Android will clear the cache when necessary, but stil.... I call Bitmap.getPixels a number of times on a *large* bitmap, using a temporary buffer, and write the contents of this buffer to a FileOutputStream that points to a temp file on the SD-card. If you have a *small* bitmap, just calling 'compres's using the PNG (no image- quality loss) is sufficient. Be sure to not assign an image extension (e.g ".jpg" or ".png") to the name of this temporary file... it may show in the Gallery app :-) On Oct 20, 9:02 am, Vitaly Polonetsky <topix...@gmail.com> wrote: > Thanks for your reply, that's what I'm planing to do.My other question was > where do I temporary store the image ? > I can store it in EXTERNAL_CONTENT_URI, Context.getCacheDir() or > Context.getFilesDir() ... > But what's preferable and why ? (considering: deletion timing, permissions, > locks, etc.) > Personally, I would choose cache dir. > > On Tue, Oct 20, 2009 at 12:52 AM, Streets Of Boston <flyingdutc...@gmail.com > > > > > > > wrote: > > > You can delete it while handling the onActivityResult (this method is > > called after your sub/child activity finishes). > > > On Oct 14, 10:02 am, m_vitaly <m_vit...@topixoft.com> wrote: > > > Ok, but what if I want to delete if after issuing startActivity, can I > > > do this ? > > > And where should I store it then ? > > > > On Oct 14, 4:20 am, Streets Of Boston <flyingdutc...@gmail.com> wrote: > > > > > When you store it in the EXTERNAL_CONTENT_URI, your image can already > > > > be shared with every other app on the phone. > > > > > When you added (inserted) the image, your result was a Uri. This Uri > > > > can be used by any other app to obtain your image. > > > > > On Oct 13, 4:42 pm, m_vitaly <m_vit...@topixoft.com> wrote: > > > > > > My program creates a bitmap and successfully stores it on external > > > > > storage (Images.Media.EXTERNAL_CONTENT_URI). > > > > > > The next option to implement is to share the image. > > > > > I'm thinking about different way of doing it: > > > > > 1. Save it as captured image (as before) and startActivity with > > > > > Intent.ACTION_SEND intent with the saved image uri. > > > > > 2. Save it in application's home directory (getFileStreamPath()), > > > > > startActivityForResult as in 1. and I hope that I'll recieve a result > > > > > when the message is sent. > > > > > 3. Save it in some kind of temp/cache folder and don't bother about > > > > > deleting it or delete it as in 2. > > > > > > Personally I prefer the second option. > > > > > > My questions are: > > > > > Will it work with startActivityForResult() as in 2. ? > > > > > Do I have access to temp/cache folder as in 3. ? If I do, Should I > > > > > delete the file afterwards ? > > > > > May be some flag for Intent.ACTION_SEND to delete the file > > > > > afterwards ? > > > > > > Thanks.- Hide quoted text - > > > > - Show quoted text - > > -- > Best regards, > Vitaly Polonetsky- Hide quoted text - > > - Show quoted text - --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
