Draw From Old Canvas - Android

Question

I\'m making an App that needs to be able to draw new graphics on top of the last set.

This is my current onDraw() method -

protected void onDraw(Canvas          


        

Answer 1

You will have to store the previous image persistently onto a ArrayList, and during ondraw, loop through the ArrayList to redraw all items.

something like this:

for (Graphic graphic : _graphics) {
    bitmap = graphic.getBitmap();
    coords = graphic.getCoordinates();
    canvas.drawBitmap(bitmap, coords.getX(), coords.getY(), null);
}