Pre-guess size of Bitmap from the actual Uri, before scale-loading

Question

If you have a Uri and you need the Bitmap, you could theoretically do this

Bitmap troublinglyLargeBmp =
  MediaStore.Images.Media.getBitmap(
            


        

Answer 1

See the Android guide to handling large bitmaps.

Specifically this section:

BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeResource(getResources(), R.id.myimage, options);
int imageHeight = options.outHeight;
int imageWidth = options.outWidth;
String imageType = options.outMimeType;

EDIT

In your case, you'll replace the decodeResource line with:

BitmapFactory.decodeFileDescriptor(fileDescriptor.getFileDescriptor(), null, options);