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--- Begin Message ---A bug would be great. Please send me the link. Thanks! On Mon, Sep 14, 2009 at 8:49 AM, michael maitlen <[email protected]>wrote:> > After trying to get the bug to occur all weekend, I was finally able > to get it to happen this morning. > > Once the screen freezes and the "Force Close Dialog" comes up, non of > the buttons have any effect with on the screen. In the logs though, > the Home button, triggers a DeadObjectException...I've got an > extensive log that I could supply, I assume it'd be better to post it > on the bug page? > > Another interesting thing...the device is completely unresponsive, I > even tried to call it from my home phone with no response at all, and > I'm positive I had the correct phone number. > > On Sep 11, 8:59 pm, Dianne Hackborn <[email protected]> wrote: > > 10 threads is still a lot. All of the devices you will run on the > > foreseeable future are only going to have one cpu, so one thread, maybe > two > > (you might get some parallelism out of decoding while another thread is > > reading through problem not much) should be more than enough. Going up > to > > ten has a good chance of having worse performance than just a couple, > since > > the scheduler is now needing to bounce around between all those threads > > (plus until 1.6 we are only relying on the Linux nice level for > scheduling > > threads, so the more threads you have doing work in the background, the > more > > time you will take away from the main thread as it wants slices to > interact > > with the user). > > > > Anyway nothing you do should make the system freeze, so there is > definitely > > a system bug there. :) Does pressing the home button not work either? > > > > On Fri, Sep 11, 2009 at 7:00 PM, Mark Murphy <[email protected] > >wrote: > > > > > > > > > > > > > michael m wrote: > > > > What I am doing, which I question, is loading each image via a thread > > > > as it is retrieved from the ImageCache...I pass back a default image > > > > if the bitmap is null, then update the default image in the > ImageViews > > > > with the Bitmap is loaded from the sdcard; I'm doing this by posting > > > > to a Handler in the Adapter from the thread that loads the image. > > > > > I suspect you are going to get in trouble with that many threads. > > > > > > So if the number of threads is the problem I'm thinking of loading > all > > > > the bitmaps when the app is first initiated, probably using the > > > > AsyncTask class. > > > > > That is probably too far in the other extreme. > > > > > > A question I have though about this is that the docs > > > > say that you can only call execute() once...what's happens if some of > > > > my Bitmaps are garbage collected?? Do I then call individual threads > > > > to reload? I've looked through some of the Google apps, Shelves and > > > > Photostream, but they don't seem to be using Bitmaps wrapped in > > > > SoftReferences. > > > > > I've wrapped up this pattern in a ThumbnailAdapter: > > > > >http://github.com/commonsguy/cwac-thumbnail/tree/master > > > > > Basically, I use AsyncTaskEx, which is my fork of AsyncTask that allows > > > for 10 parallel threads -- not infinite, but not only 1. > > > > > I also gave up on SoftReferences, as posts in this list from a month or > > > two ago gave me the impression that SoftReferences are effectively > > > pointless with the current Dalvik garbage collection implementation. > > > Instead, I use an LRU cache, (re)loading images on demand via > AsyncTaskEx. > > > > > It may be, though, that ThumbnailAdapter will "just work" for you, > > > though I have not tried it for images starting on the SD card -- I was > > > focused on caching them off the Internet. I don't have much in the way > > > of documentation at this point, but there is a sample app in the github > > > project. While I suspect I'll be upgrading the implementation in the > > > coming months, the "API" (put the URL of the image to be loaded in the > > > ImageView's setTag()) should remain constant. > > > > > If you give it a whirl and run into problems, ping me on the cw-android > > > Google Group, and I may be able to help: > > > > >http://groups.google.com/group/cw-android > > > > > -- > > > Mark Murphy (a Commons Guy) > > >http://commonsware.com|http://twitter.com/commonsguy > > > > > Android Development Wiki:http://wiki.andmob.org > > > > -- > > 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. > > > -- 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] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
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