Question

How can I create the bitmap from the canvas of custom view.

Answer 1

There is no way to extract the Bitmap out of a Canvas. The only way you can access it is to pass it yourself when creating the canvas like this new Canvas(myBitmap) and keep the reference.

EDIT2: see @Alex comment blow – the approach of passing a Bitmap to the Canvas does not seem to work for more recent versions of Android.

EDIT : If you don’t create the Canvas yourself, you could create a screen-sized Bitmap (or whatever size you need) and then pass it to the Canvas in onDraw calls like this: canvas.setBitmap(myBitmap).