Convert a large bitmap from byte array

Question

I know this question has been asked so many times here. I have gone through all that I came across, and unfortunately all of them said the same answer.

My requirement: I need to convert huge byte array to bitmap. By huge I meant, I am sending an http request to fetch an image, the image is fetched as byte array, I need to display this image in my application in an image view. The problem is, the image I need to fetch can be of any size, ranging from 100kb to 10+mb. The following is the solution I found all over the internet for converting byte array to bitmap in android.

Bitmap bitmap = BitmapFactory.decodeByteArray(bitmapdata , 0, bitmapdata.length); //bitmapdata is the byte array

This works perfectly for small images, but as the image size increases to say from 2-3mb onwards, this will crash with an out of memory error. Is there a better way for the bitmap conversion which won't crash my app?

refer this http://stackoverflow.com/a/13226946/942224 may be it'll help you.. — Sanket Kachhela, Aug 11 '14 at 06:21
It is from a file input stream. I need it from a byte array. — Harikrishnan, Aug 11 '14 at 06:23
yes... if you are fetching images from gallery than you have a file path.. than you can try my answer.. — Sanket Kachhela, Aug 11 '14 at 06:28
so use decodeByteArray with BitmapFactory.Options parameter like in a link abouve — pskink, Aug 11 '14 at 06:29
I want to convert a byte array that i get as the response of an http request to a bitmap. Not a file. — Harikrishnan, Aug 11 '14 at 06:29

score 0 · Answer 1 · answered Aug 11 '14 at 06:27

0

Heavy bitmaps usually mean very large bitmaps. You can limit the size of a resulting bitmap from a byte array (or input stream) by using Options with the BitmapFactory:

Options options = new Options();
options.outWidth = widthLimit;
options.outHeight = heightLimit;
Bitmap bitmap = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length, options);

This should get you started.

answered Aug 11 '14 at 06:27

Gil Moshayof

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What if I need the bitmap in full resolution without down sizing? – Harikrishnan Aug 11 '14 at 06:30
There's no point to have a higher resolution than your screen size. Try limiting it to that? If you're trying to display a truly massive picture which the user should be able to scroll, then you should perhaps try methods like splitting the image up into segments, or even look at rendering it using OpenGL-ES textures. – Gil Moshayof Aug 11 '14 at 06:32
Let me try this one. :) – Harikrishnan Aug 11 '14 at 06:34
I know I was testing the extremes, but this caused the same crash when I tested with an image of 16mb in size. I may receive images of any size, mostly heavily sized images like this in my app. – Harikrishnan Aug 11 '14 at 07:15

Convert a large bitmap from byte array

1 Answers1