Question

我想将一个15Mb的图像文件加载到一个imageview中..我尝试使用piccasa和其他一些方法加载它，但都返回内存异常。

我使用的代码是

       Picasso.with(getActivity()).load(R.drawable.highqual).into(imageView);

有没有办法让它在Android

中成为可能

Answer 1

试试这个：

调用此函数decodeSampledBitmapFromFile(String filePath,int reqWidth, int reqHeight)

reqHeight和reqWidth是您的ImageView维度。另请注意，如果需要很长时间并发送给您ANR，请将其设置为单独的thread，然后将其设置为ImageView。

代码来自doc，我将其更改为读取图像文件。

public static int calculateInSampleSize(
            BitmapFactory.Options options, int reqWidth, int reqHeight) {
    // Raw height and width of image
    final int height = options.outHeight;
    final int width = options.outWidth;
    int inSampleSize = 1;

    if (height > reqHeight || width > reqWidth) {

        final int halfHeight = height / 2;
        final int halfWidth = width / 2;

        // Calculate the largest inSampleSize value that is a power of 2 and keeps both
        // height and width larger than the requested height and width.
        while ((halfHeight / inSampleSize) > reqHeight
                && (halfWidth / inSampleSize) > reqWidth) {
            inSampleSize *= 2;
        }
    }

    return inSampleSize;
    }

    public static Bitmap decodeSampledBitmapFromFile(String filePath,int reqWidth, int reqHeight) {

        // First decode with inJustDecodeBounds=true to check dimensions
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(filePath, options);

        // Calculate inSampleSize
        options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);

        // Decode bitmap with inSampleSize set
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeFile(filePath, options);
    }

参考：

Loading Large Bitmaps Efficiently

将高质量图像加载到imageview

1 个答案: