I want to create a bitmap from a bytearray .
I tried the following codes
Bitmap bmp;
bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
and
ByteArrayInputStream bytes = new ByteArrayInputStream(data);
BitmapDrawable bmd = new BitmapDrawable(bytes);
bmp = bmd.getBitmap();
But ,When i am tring to initialize the Canvas object with the bitmap like
Canvas canvas = new Canvas(bmp);
It leads to an error
java.lang.IllegalStateException: Immutable bitmap passed to Canvas constructor
Then how to get a mutable bitmap from an byteArray.
Thanks in advance.
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