Views - yes
Canvas - you can create your own to draw into a bitmap, but views are
handed a Canvas on their onDraw() method. For a given drawing pass,
all of the views (usually) are handed the same Canvas (which points to
the screen). However, on a subsetquent call to onDraw(), the actual
Canvas object may be different (even if it also points to the screen).
Drawable - this is an abstraction for something that knows how to draw
itself inside its bounds. There are lots of subclasses (you can create
your own), including one that wrapps a Bitmap
Bitmap - this is a basic drawing primitive that can be drawn into a
Canvas, and/or can be the target of a Canvas. It has basic dimensions
and a reference to memory for pixels (either the screen or to
offscreen memory)
On Nov 4, 2008, at 8:42 AM, joshbeck wrote:
Hello all,
Is this correct?
View: The android screen is divided up into views. Views are basic
layout objects.
Canvas: You need to have at least one canvas if you want to do any
drawing. Each
view potentially has its own canvas.
Drawable: ---)This is where my 10:30 bedtime turns into a 2:30 am nap
in the chair before work.)
-What is the difference between a Bitmap and a Drawable?
Can Drawables only be used with ImageView Views?
Thanks for any help.
Josh Beck
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