Slicing a Picture

I have a

Picture pic = webView.capturePicture();

which is potentially huge and needs to be sliced into multiple chunks that will fit the screen.

The naive thing I'm currently doing is

Bitmap bm = Bitmap.createBitmap(screenWidth开发者_如何学Python, screenHeigth, RGB_565);
Canvas canvas = new Canvas(bm);
canvas.drawPicture(pic);
fullScreenImageView.setImageBitmap(bm);

What would be the efficient way to "paginate" the Picture to be displayed on screen (these "pages" will be later replacing one another)?

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Can't you just call getDrawingCache() on the webView? You won't be creating any new bitmap because it is the cache of the webview which is uses to scroll.