java.lang.OutOfMemoryError:位图大小超过VM预算

Question

所以我有一个懒惰的图像加载器ListView.我还使用本教程来更好地管理内存并将SoftReferenceBitmap图像存储在我的ArrayList.

我的ListView作品从数据库中加载了8张图像,然后一旦用户滚动到底部,它就会加载另外8张等等.当有大约35张图像或更少时,没有问题,但是还有我的应用程序强制关闭OutOfMemoryError.

我无法理解的是我在try catch中有我的代码:

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 < 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();
}

但是try catch块没有捕获OutOfMemory异常,根据我的理解,SoftReference当应用程序内存不足时,应该清除Bitmap映像,从而停止OutOfMemory抛出异常.

我在这做错了什么？

Answer 1

我想这篇文章可能会对你有所帮助

//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;
}

Answer 2

OutOfMemoryError是一个错误而不是异常，你不应该捕获它。

请参阅http://mindprod.com/jgloss/exception.html

编辑：已知问题请参阅此问题