Converting byte[] to Bitmap not working - Null pointer exception

Question

When I execute bitmap.getHeight(); I got a nullPointerException. This is how I try to get my bitmap:

In my json:"pic":"iVBORw0KGgoAAAANSUhEUgAAAgAAAAGACAIAAABUQk3......."

I retrieve from json the following:

byte[] decode = Base64.decode(jsonObj.getString("pic"), Base64.DEFAULT);
Log.i("size",decode.length+""); //65535
Bitmap pic = getImage(decode);

public static Bitmap getImage(byte[] image) {
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inPreferredConfig = Bitmap.Config.ARGB_8888;
    return BitmapFactory.decodeByteArray(image, 0, image.length,options);
}

But I can't display the image. Any ideas?

Exactly where is your ´bitmap´ variable, and where do you execute ´getHeight()´? — Squirrelkiller
– Squirrelkiller, Commented Sep 20, 2016 at 8:29
you may try this link<br/> - stackoverflow.com/questions/11613594/… - stackoverflow.com/questions/11547327/… — Arif Ramadan
– Arif Ramadan, Commented Sep 20, 2016 at 8:32
My Bitmap variable is pic and whatever operation I try to do with it is giving me nullpointerexception. Thanks Arif, that link will be very useful when trying to convert bitmaps retrieving Blob from my local database, but for now is not giving me the solution to this. — lulu666
– lulu666, Commented Sep 20, 2016 at 8:43

Anton Malyshev · Accepted Answer · 2016-09-20 08:55:01Z

0

The error must be inside BitmapFactory.decodeByteArray and most probably the source of the problem is unsupported image format. Check that you pass base64 encoded jpeg, png, gif or bmp.

Also if you get 65535 as decode's size - it is very suspicious. Maybe the data is trimmed in database (if you have limit of 65535 for blob size) or somewhere else.

edited Sep 20, 2016 at 8:55

answered Sep 20, 2016 at 8:49

Anton Malyshev

8,9462 gold badges33 silver badges48 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

lulu666 Over a year ago

Thats the problem, I can't go further than 65KB to store... I need to compress previously. Thanks.

greenapps Over a year ago

Check that you pass base64 encoded jpeg, png, gif or bmp. No. Certainly not base64 encoded. And i think that gif and bmp are not supported too.

Anton Malyshev Over a year ago

Certainly yes, because Base64.decode is called in the code.

greenapps Over a year ago

Mmm.. that is new for me. Never saw that done. Sorry for the confusion.

greenapps Over a year ago

As i had problems to believe this i did a test and base64 encoded a byte array for which BitmapFactory.decodeByteArray() delivered a perfect bitmap. After encoding it failed.

Collectives™ on Stack Overflow

Converting byte[] to Bitmap not working - Null pointer exception

1 Answer 1

5 Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

5 Comments

Linked

Related