Android ListView显示图像结果内存不足

Question

Okay,

I have what I think is an odd problem.

I load photos into a list view as the user scroll (meaning if picked up from disk or online, it takes a little time and they "pop in")

1)

I ensure that I only fetch one image online + resize to 1/3 width at a time (a lock) -- this is to ensure not eg 5 threads each are converting a .jpg to bitmap at the same time. (Imagine a user scrolling very fast, it would then be conceivable this could happen.)

2)

All images on disk are only 1/3 width

3)

While the bitmaps are scaled up to fit device width, I call recycle and set bitmaps to null when used in the getView . (I am converting bitmaps to a BitmapDrawable object which the listitem imageview uses in a setImageDrawable call)

4)

I reuse view in getView if not null

5)

I load bitmaps like this:

BitmapFactory.Options o = new BitmapFactory.Options();   
o.inPurgeable = false; // I do not use this since I resize/scale down images myself later
o.inInputShareable = false;
o.inPreferredConfig = Config.RGB_565;
res.bitmap = BitmapFactory.decodeStream(is, null, o);

6)

I also clean scrap items

public void onMovedToScrapHeap(View view) {
          final TextView description = (TextView)view.findViewById(R.id.listitem_news_content);
          description.setText("");
          final ImageView image = (ImageView)view.findViewById(R.id.listitem_news_image);
          image.setImageBitmap(null);                                            
        }

I am testing on a Samsung Galaxy II. Do you guys have any ideas on what more I could try? Since I only max need to show 10 items, I would think it should be possible...

Answer 1

Try using widely used library Universal Image Loader https://github.com/nostra13/Android-Universal-Image-Loader

It is simple and straight forward and you will never have to care about decoding images yourself.

Option two: There's a powerful new API for loading image is available from the team of Square http://square.github.io/picasso/

Answer 2

Try this, it worked for me in case of OutOfMemory...using System.gc()

bitmap = null;
imageView.setImageBitmap(null);
System.gc();