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java.lang.OutOfMemoryError: bitmap size exceeds VM budget

开发者 https://www.devze.com 2023-01-20 18:04 出处:网络
So I\'ve got a lazy image loader for my ListView. I also use this tutorial for better memory management and have SoftReference Bitmap images stored in my ArrayList.

So I've got a lazy image loader for my ListView. I also use this tutorial for better memory management and have SoftReference Bitmap images stored in my ArrayList.

My ListView works loads 8 images from a DB then once the user scrolls all the way to the bottom it loads another 8 etc etc. There was no issue when there were around 35 images or less, but any more and my app Force Closes with OutOfMemoryError.

The thing that I can't understand is I have my code inside a try catch:

try
{
    BitmapFactory.Options o = new BitmapFactory.Options();
    o.inJustDecodeBounds = true;
    BitmapFactory.decodeByteArray(image, 0, image.length, o);

    //Find the correct scale value. It should be the power of 2.
    int width_tmp = o.outWidth, height_tmp = o.outHeight;
    int scale = 1;

    while(true)
    {
        if(width_tmp/2 < 开发者_高级运维imageWidth || height_tmp/2 < imageHeight)
        {
            break;
        }

        width_tmp/=2;
        height_tmp/=2;
        scale++;
    }

    //Decode with inSampleSize
    BitmapFactory.Options o2 = new BitmapFactory.Options();
    o2.inSampleSize = scale;
    bitmapImage = BitmapFactory.decodeByteArray(image, 0, image.length, o2);        
}
catch (Exception e)
{
    e.printStackTrace();
}

But the try catch block isn't catching the OutOfMemory exception and from what I understand the SoftReference Bitmap images should be cleared when the application is running out of memory stopping the OutOfMemory exception being thrown.

What am I doing wrong here?


I suppose may be this post will help you

//decodes image and scales it to reduce memory consumption
private Bitmap decodeFile(File f){
    try {
        //Decode image size
        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(new FileInputStream(f),null,o);

        //The new size we want to scale to
        final int REQUIRED_SIZE=70;

        //Find the correct scale value. It should be the power of 2.
        int width_tmp=o.outWidth, height_tmp=o.outHeight;
        int scale=1;
        while(true){
            if(width_tmp/2<REQUIRED_SIZE || height_tmp/2<REQUIRED_SIZE)
                break;
            width_tmp/=2;
            height_tmp/=2;
            scale*=2;
        }

        //Decode with inSampleSize
        BitmapFactory.Options o2 = new BitmapFactory.Options();
        o2.inSampleSize=scale;
        return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
    } catch (FileNotFoundException e) {}
    return null;
}


OutOfMemoryError is an error not an exception, you should not catch it.

see http://mindprod.com/jgloss/exception.html

EDIT: known problem see this issue


Error and Exception are subclassed from Throwable. Error are supposed to be so drastic, that you should not catch them.

But you can catch anything.

try
{ 
}
catch (Throwable throwable)
{
}
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