6

我在一个列表视图中使用 ImageLoader 来显示来自 URL 的图像。滚动列表时，应用程序没有响应。我检查了 logcat 并得到了这个日志报告http://pastebin.com/Zfsk7r9X。在此日志中，显示了“将目标 GC 堆从 55.234MB 固定到 48.00MB”。我怎样才能避免这个内存问题。我已经在 ImageLoader 类中完成了 System.GC() 。我使用的 decodeFile() 如下所示

// 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);

        // Find the correct scale value. It should be the power of 2.
        final int REQUIRED_SIZE = 70;
        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;
}
4

1 回答 1

5

消息“Clamp target GC heap”由 VM 在绝望时记录，堆分配失败，尝试后堆返回到以前的理想限制。从setIdealFootprintHeapSource.cpp 的文档中：

/*
 * Sets the maximum number of bytes that the heap source is allowed
 * to allocate from the system.  Clamps to the appropriate maximum
 * value.
 */
于 2012-12-15T06:36:00.827 回答