I would vote with all my 4 thumbs up for the *option* of creating a mutable bitmap from a file/input-stream/etc. For optimizations, the default should still be immutable bitmaps (as you described), but an option for loading it into a mutable bitmap would be great!.
Question: Is there a way around this in Android2.2, by using the Bitmap's *NDK* api? On Jan 17, 2:55 pm, Romain Guy <[email protected]> wrote: > I'll try to add a new API to load mutable bitmaps from BitmapFactory but I > can't make any guarantee as to when it will be added to the platform (it's > doubtful it will be in the first release of Android 3.0.) The main reason > why bitmaps are mutable when loaded from a BitmapFactory is optimization. > When a Bitmap is immutable the rendering layer might be able to draw it more > efficiently. Also, when a Bitmap is loaded from resources and used in > drawables, it is shared by all the drawables. It's also better to have > immutable bitmaps when recording pictures (which is what WebView does for > faster rendering.) > > As for your Log.d issue, I have never used a Galay Tab, so I have no idea. > I've used Log.d successfully on numerous other devices though. > > > > > > On Mon, Jan 17, 2011 at 11:46 AM, Matthew Fleming <[email protected]> wrote: > > Thanks very much for the explanation regarding the 3 memory functions. > > I should have known this; my mistake. > > > I really wish Google would consider modifying the BitmapFactory > > methods to allow for loading a mutable bitmap from a file/stream/ > > resource. The current arrangement has no obvious justification, and, > > judging from a few postings here and there, has caused problems for > > other developers as well. > > > Any thoughts on why I can't use Log.d with actual hardware? > > > Matthew Fleming > > > On Jan 17, 12:44 pm, Romain Guy <[email protected]> wrote: > > > Hi Matthew, > > > > I am sorry that you didn't get a better answer before, but this is, > > > unfortunately, the only way of doing it with the existing APIs. This kind > > of > > > feedback is important to us because it tells us what APIs application > > > developers need. > > > > As for your second question, the values returned are expected. > > > Runtime.freeMemory() tells you how much you can still allocate on the > > heap > > > before it needs to expand. Runtime.totalMemory() indicates the current > > size > > > of the heap, and Runtime.maxMemory() tells you how big the heap can be > > > before your run out of memory. > > > > On Mon, Jan 17, 2011 at 4:18 AM, Matthew Fleming <[email protected]> > > wrote: > > > > Hi, > > > > > I posted earlier about my need to find a way to load a mutable bitmap. > > > > I need to be able to load a bitmap from an input stream, annotate it, > > > > and save it. At present, the only thing I seem to be able to do is > > > > load an immutable bitmap, copy it, annotate the copy, and then save > > > > that. THIS IS NOT A SOLUTION, because then I need memory for two > > > > copies of the bitmap, and I am working with large images. > > > > > COULD SOMEONE FROM GOOGLE PLEASE TELL US WHY the BitmapFactory methods > > > > don't have the option of creating the Bitmap as mutable? A bit heavy- > > > > handed to force the Bitmap to be immutable, don't you think? For that > > > > matter, DOES ANYONE AT GOOGLE PAY ANY ATTENTION TO THIS GROUP? You > > > > post to the Apple Developer groups, you get an answer (even on the > > > > weekend) from a real live person who knows what he's talking about, > > > > and who is (usually) on the Apple payroll. Not here. > > > > > Second question. I figured I would check the available memory before > > > > loading the bitmap, then load it at reduced resolution if necessary. > > > > But Runtime.getRuntime().freeMemory() returns values that make no > > > > sense. For example, if I put this in the onCreate of my first (main) > > > > activity: > > > > long freeMemory = Runtime.getRuntime().freeMemory(); > > > > Log.d("tag",String.valueOf(freeMemory)); > > > > freeMemory = Runtime.getRuntime().maxMemory(); > > > > Log.d("tag",String.valueOf(freeMemory)); > > > > I get a total memory of 16,777,216, but free memory of only 472,824. > > > > This can't be right. > > > > > The above is with the emulator. When I try it with my Samsung Galaxy > > > > Tab, I don't get any information, because Log.d() doesn't seem to work > > > > at all with the actual hardware. Why is that? > > > > > Some real assistance with these problems would be much appreciated. > > > > Google? Anyone home? > > > > > Matthew Fleming, MD > > > > Fleming Dermatopathology, LLC > > > > DermVision, LLC > > > > > -- > > > > 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%2Bunsubs[email protected]><android-developers%2Bunsubs > > [email protected]> > > > > For more options, visit this group at > > > >http://groups.google.com/group/android-developers?hl=en > > > > -- > > > Romain Guy > > > Android framework engineer > > > [email protected] > > > > Note: please don't send private questions to me, as I don't have time to > > > provide private support. 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%2Bunsubs[email protected]> > > For more options, visit this group at > >http://groups.google.com/group/android-developers?hl=en > > -- > Romain Guy > Android framework engineer > [email protected] > > Note: please don't send private questions to me, as I don't have time to > provide private support. All such questions should be posted on public > forums, where I and others can see and answer them- Hide quoted text - > > - Show quoted text - -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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