问题
I have an image which is stored as a byte[] array, and I want to flip the image before I send it off to be processed elsewhere (as a byte[] array).
I've searched around and can't find a simple solution without manipulating each bit in the byte[] array.
What about converting the byte array[] to an image type of some sort, flipping that using an existing flip method, and then converting that back to a byte[] array?
Any advice?
Cheers!
回答1:
Byte array to bitmap:
Bitmap bmp = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length);
Use this to rotate the image by providing the right angle (180):
public Bitmap rotateImage(int angle, Bitmap bitmapSrc) {
Matrix matrix = new Matrix();
matrix.postRotate(angle);
return Bitmap.createBitmap(bitmapSrc, 0, 0,
bitmapSrc.getWidth(), bitmapSrc.getHeight(), matrix, true);
}
Then back to the array:
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] flippedImageByteArray = stream.toByteArray();
来源:https://stackoverflow.com/questions/16950953/flip-image-stored-as-a-byte-array