create Bitmap from byteArray in android

Question

I want to create a bitmap from a bytearray .

I tried the following codes

Bitmap bmp;

bmp = BitmapFactory.decodeByteArray(data, 0, data.length);


        

Answer 1

You need a mutable Bitmap in order to create the Canvas.

Bitmap bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
Bitmap mutableBitmap = bmp.copy(Bitmap.Config.ARGB_8888, true);
Canvas canvas = new Canvas(mutableBitmap); // now it should work ok

Edit: As Noah Seidman said, you can do it without creating a copy.

BitmapFactory.Options options = new BitmapFactory.Options();
options.inMutable = true;
Bitmap bmp = BitmapFactory.decodeByteArray(data, 0, data.length, options);
Canvas canvas = new Canvas(bmp); // now it should work ok