Question

我尝试在Android中旋转位图并在ImageView中显示定向位图。

focus

并使用https://gist.github.com/9re/1990019中的ExifUtil尝试旋转它

uri = Uri.parse(path)
try {
    Bitmap myBitmap = MediaStore.Images.Media.getBitmap(getActivity().getContentResolver(), uri);
    Bitmap orientedBitmap = ExifUtil.rotateBitmap(path, myBitmap);
    imageView.setImageBitmap(orientedBitmap);
} catch (IOException e) {
    e.printStackTrace();
}

它给了我这个日志

public class ExifUtil {
    public static Bitmap rotateBitmap(String src, Bitmap bitmap) {
        try {
            int orientation = getExifOrientation(src);

            if (orientation == ExifInterface.ORIENTATION_NORMAL) {
                return bitmap;
            }

            Matrix matrix = new Matrix();
            switch (orientation) {
                case ExifInterface.ORIENTATION_FLIP_HORIZONTAL:
                    matrix.setScale(-1, 1);
                    break;
                case ExifInterface.ORIENTATION_ROTATE_180:
                    matrix.setRotate(180);
                    break;
                case ExifInterface.ORIENTATION_FLIP_VERTICAL:
                    matrix.setRotate(180);
                    matrix.postScale(-1, 1);
                    break;
                case ExifInterface.ORIENTATION_TRANSPOSE:
                    matrix.setRotate(90);
                    matrix.postScale(-1, 1);
                    break;
                case ExifInterface.ORIENTATION_ROTATE_90:
                    matrix.setRotate(90);
                    break;
                case ExifInterface.ORIENTATION_TRANSVERSE:
                    matrix.setRotate(-90);
                    matrix.postScale(-1, 1);
                    break;
                case ExifInterface.ORIENTATION_ROTATE_270:
                    matrix.setRotate(-90);
                    break;
                default:
                    return bitmap;
            }

            try {
                Bitmap oriented = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
                bitmap.recycle();
                return oriented;
            } catch (OutOfMemoryError e) {
                e.printStackTrace();
                return bitmap;
            }
        } catch (IOException e) {
            e.printStackTrace();
        } 

        return bitmap;
    }

    private static int getExifOrientation(String src) throws IOException {
        int orientation = ExifInterface.ORIENTATION_UNDEFINED;
        Log.e("src", src);
        try {
            ExifInterface exif = new ExifInterface(src);
            orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, orientation);
        } catch (SecurityException | IllegalArgumentException e) {
            e.printStackTrace();
        }

        return orientation;
    }
}

为什么ExifInterface exif = new ExifInterface（src）;`在带有两个缺失斜杠的文件路径上抛出FileNotFoundException？

Answer 1

从该路径中删除“file：//”，以便最终获得真实的文件系统路径

/storage/emulated/0/DCIM/image20171117_170310.jpg

Android ExifInterface抛出FileNotFoundException

1 个答案: