Hi, As written, your getView() method *never* reuses the convertView parameter. This means you are creating new Views and new Bitmaps every time the method is called, which happen very often while scrolling/flinging a grid.
You first need to start using the convertView when possible (if convertView != null, cast it to an ImageView and set your drawable on it.) Note that setting the scale type, layout params and background resource should be done only when convertView == null. This will save you a lot of time. Finally, you should create a cache for your bitmaps to avoid reloading them all the time. I encourage you to read the source code of the following application to see how to implement an efficient list of images: http://code.google.com/p/shelves/ Also refer to my Google I/O 2009 talk about UI optimization: http://code.google.com/events/io/2009/sessions/TurboChargeUiAndroidFast.html In this talk I describe how to implement getView() efficiently and talk about image caches briefly at the end. On Mon, Apr 26, 2010 at 12:50 AM, Lars <axberg.l...@gmail.com> wrote: > Hi > > I have a gallery in wich I show a row of images, the images can both > be from the Camera gallery or from the internet as a web url. My > getView() method makes an exception when I put to many images from the > gallery inside it. Should i down sample the images before attaching > them to the view? and how is that done ? heres my getView method: > > public View getView(int position, View convertView, ViewGroup parent) > { > > > Controller co = Controller.GetInstance(); > > ImageView imageView = new ImageView(context); > > > if(co.server.currRecord.image.get(position).containsKey("data")) > { > // we have a content URI and assign it to the gallery > > imageView.setImageURI((Uri)co.server.currRecord.image.get(position).get("data")); > } > else > { > //we have a web url and need our ImageOperation method to > fetch and decode the drawable. > > imageView.setImageDrawable(FileConvert.ImageOperations(context, > Controller.GetInstance().server.currRecord.image.get(position).get("url").toString())); > } > > imageView.setScaleType(ImageView.ScaleType.FIT_XY); > imageView.setLayoutParams(new Gallery.LayoutParams(150, 120)); > imageView.setBackgroundResource(itemBackground); > > return imageView; > } > > - Lars > > -- > 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 > -- Romain Guy Android framework engineer romain...@android.com 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 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
