The heap works pretty much like in a regular VM. As your app needs more memory the heap grows accordingly (but doesn't shrink.) For instance, if you are using 1 MB out of your 2 MB of allocated heap and need to load 2 more MB, the heap will grow to more than 3 MB, and you will use 3 MB out of the heap. But when the heap reaches a total allocated size of 16 MB and your app needs more memory, you get an OutOfMemoryError.
On Wed, Dec 3, 2008 at 11:30 PM, EboMike <[EMAIL PROTECTED]> wrote: > > Thanks, Romain. I'm grabbing them from a server, but you're right, if > anything, I should convert and re-save them in a smaller format before > caching them locally. Well, I just tried to get it running quickly :) > > One laaast thing - You mentioned that an app has a 16MB heap. How is > that split up? A Runtime.getRuntime().freeMemory() right on startup in > the app above gives me about 800KB or so (although the app is later > able to allocate 1MB to decode an image). I'm not very familiar with > Dalvik's memory management, how is the whole thing set up? > > -Mike > > > On Dec 3, 11:26 pm, Romain Guy <[EMAIL PROTECTED]> wrote: >> Well you could start by not loading such huge images in a Gallery. >> Even if the recycler was working correctly it is a LOT of data to read >> and to decode. It's also a lot of wasted memory (and it also slows >> drawing down since the bitmaps are drawn rescaled.) You should use >> BitmapFactory.Options or Bitmap.createScaledBitmap to load your image >> pre-scaled to a much more reasonable size. >> >> >> >> On Wed, Dec 3, 2008 at 11:23 PM, EboMike <[EMAIL PROTECTED]> wrote: >> >> > Thanks a lot for the very quick replies. One last thing: Do you happen >> > to have any remote idea about when the next SDK release is scheduled? >> > My app is currently running out of memory a lot :) >> >> > On Dec 3, 11:13 pm, Romain Guy <[EMAIL PROTECTED]> wrote: >> >> A memory leak is actually totally expected in that case. Gallery, like >> >> ListView, GridView, etc. uses a recycling heap. Every time a view is >> >> unused, it is moved to the recycler. Unfortunately, if it's never >> >> taken out of the recycler... >> >> >> On Wed, Dec 3, 2008 at 11:07 PM, EboMike <[EMAIL PROTECTED]> wrote: >> >> >> > Thanks a lot, Romain! Question though - even if the gallery is not >> >> > converting the views, why doesn't it release references to them as you >> >> > move away? >> >> >> > Say, I move from view 0 to view 1, with view 0 being completely off- >> >> > screen, the gallery should remove its reference to view 0 since it is >> >> > no longer needed, and thus allow the gc to free up any memory it >> >> > holds. In fact, when I go back to view 0, I can see that a new view is >> >> > created. So what happened to the old view 0? Even with view conversion >> >> > not working, there shouldn't be memory leaks. >> >> >> > -Mike >> >> >> > On Dec 3, 11:04 pm, Romain Guy <[EMAIL PROTECTED]> wrote: >> >> >> I just checked and the bug is simply that Gallery does not convert the >> >> >> views. I'll try to fix it as soon as possible. >> >> >> >> On Wed, Dec 3, 2008 at 10:45 PM, EboMike <[EMAIL PROTECTED]> wrote: >> >> >> >> > I've already asked this in <a href="http://groups.google.com/group/ >> >> >> > android-developers/msg/9cdbf47be2505810?hl=en">This thread</a>: Here >> >> >> > is a pretty simple Gallery setup. It seems to leak with every image >> >> >> > that's loaded (see the original thread for details). >> >> >> >> > I'm tempted to file it as a bug, but I want to mention it here first >> >> >> > to make sure I'm not just making a simple mistake in my usage of the >> >> >> > Gallery. Also (as mentioned in another thread), convertView is always >> >> >> > null -- the Gallery never seems to recycle any views. Why? >> >> >> >> > To make this run, you will need to put a JPG file into the data >> >> >> > folder >> >> >> > (see code). >> >> >> >> > package ebomike.memorytest; >> >> >> >> > import android.app.Activity; >> >> >> > import android.content.Context; >> >> >> > import android.graphics.Bitmap; >> >> >> > import android.graphics.BitmapFactory; >> >> >> > import android.graphics.drawable.BitmapDrawable; >> >> >> > import android.os.Bundle; >> >> >> > import android.util.Log; >> >> >> > import android.view.View; >> >> >> > import android.view.ViewGroup; >> >> >> > import android.widget.BaseAdapter; >> >> >> > import android.widget.Gallery; >> >> >> > import android.widget.ImageView; >> >> >> >> > public class MemoryTest extends Activity { >> >> >> >> > Gallery g; >> >> >> >> > /** Called when the activity is first created. */ >> >> >> > @Override >> >> >> > public void onCreate(Bundle savedInstanceState) { >> >> >> >> > String filePath; >> >> >> >> > // NOTE: Make this point to a JPEG file. >> >> >> > filePath = getFilesDir().getPath(); >> >> >> > filePath += "/TEST_IMAGE.jpg"; >> >> >> >> > super.onCreate(savedInstanceState); >> >> >> > setContentView(R.layout.main); >> >> >> >> > g = (Gallery) findViewById(R.id.Gallery01); >> >> >> > g.setAdapter(new FullImageAdapter(this, filePath)); >> >> >> > } >> >> >> >> > class FullImageAdapter extends BaseAdapter >> >> >> > { >> >> >> > Context context; >> >> >> > String path; >> >> >> >> > FullImageAdapter(Context c, String path) >> >> >> > { >> >> >> > context = c; >> >> >> > this.path = path; >> >> >> > } >> >> >> >> > public int getCount() >> >> >> > { >> >> >> > return 1024; >> >> >> > } >> >> >> >> > public int getViewTypeCount() >> >> >> > { >> >> >> > return 1; >> >> >> > } >> >> >> >> > public boolean hasStableIds() >> >> >> > { >> >> >> > return true; >> >> >> > } >> >> >> >> > public int getItemViewType(int position) >> >> >> > { >> >> >> > return 0; >> >> >> > } >> >> >> >> > public View getView(int position, View convertView, ViewGroup >> >> >> > parent) >> >> >> > { >> >> >> > ImageView view; >> >> >> >> > if (convertView != null) >> >> >> > { >> >> >> > // Note that we never get here. Why? >> >> >> > view = (ImageView) convertView; >> >> >> > } >> >> >> > else >> >> >> > { >> >> >> > view = new ImageView(context); >> >> >> > } >> >> >> >> > Bitmap bitmap = BitmapFactory.decodeFile(path); >> >> >> > BitmapDrawable drawable = new BitmapDrawable(bitmap); >> >> >> > view.setImageDrawable(drawable); >> >> >> >> > return view; >> >> >> > } >> >> >> >> > public Object getItem(int position) >> >> >> > { >> >> >> > return position; >> >> >> > } >> >> >> >> > public long getItemId(int position) >> >> >> > { >> >> >> > return position; >> >> >> > } >> >> >> > } >> >> >> > } >> >> >> >> > The layout: >> >> >> >> > <?xml version="1.0" encoding="utf-8"?> >> >> >> > <LinearLayout xmlns:android="http://schemas.android.com/apk/res/ >> >> >> > android" >> >> >> > android:orientation="vertical" >> >> >> > android:layout_width="fill_parent" >> >> >> > android:layout_height="fill_parent"> >> >> >> > <TextView >> >> >> > android:layout_width="fill_parent" >> >> >> > android:layout_height="wrap_content" >> >> >> > android:text="@string/hello" >> >> >> > /> >> >> >> > <Gallery android:id="@+id/Gallery01" >> >> >> > android:layout_width="fill_parent" >> >> >> > android:layout_height="fill_parent"></Gallery> >> >> >> >> > </LinearLayout> >> >> >> >> -- >> >> >> Romain Guywww.curious-creature.org >> >> >> -- >> >> Romain Guywww.curious-creature.org >> >> -- >> Romain Guywww.curious-creature.org > > > -- Romain Guy www.curious-creature.org --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. 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