Image on canvas to JPEG file

by
  1. create an empty bitmap
  2. create a new Canvas object and pass this bitmap to it
  3. call view.draw(Canvas) passing it the canvas object you just created. Refer Documentation of method for details.
  4. Use Bitmap.compress() to write the contents of the bitmap to an OutputStream, file maybe.

Pseudo code:

Bitmap  bitmap = Bitmap.createBitmap( view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
view.draw(canvas); 
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);

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