Question

When I create a new Canvas in onDraw() like this:

Canvas c = new Canvas(myBitmap);

and then use this to draw something, it dosen’t work.

But when I use the canvas parameter from onDraw(Canvas canvas), it works. Can someone tell me why?

Answer 1

Try out this –

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);

And, see the related question from Stackoverflow

and, try out the Sampleapp also.