I think the problem is that the onCreate() is never called. I put a
little error message in the onCreate(), and it does not show in the
output.
Is there a way to draw a canvas without using an onCreate() or an
onDraw()? This would be a lot more useful for me...
For example, can I do something like this:
public class TestDraw extends Activity {
public TestDraw() {
TestViewDraw view = new TestViewDraw(getBaseContext());
setContentView(view);
}
private class DemoView extends View{
public DemoView(Context context){
super(context);
Bitmap b = Bitmap.createBitmap(100, 100,
Bitmap.Config.RGB_565);
Canvas canvas = new Canvas(b);
canvas.drawColor(Color.WHITE);
}
}
}
On Mar 5, 3:01 pm, Mariano Kamp <mariano.k...@gmail.com> wrote:
> after the state of something you are interested in changes you can call
> invalidate() on the canvas which will afaik cause the canvas to be redrawn
> as soon as the UI thread gets to it.
>
> On Thu, Mar 5, 2009 at 8:09 PM, mcmc <manni...@gmail.com> wrote:
>
> > I have a method (let's call this methodA) and I would like the onDraw
> > function to be called in the middle of method A.
>
> > How would I do this? Right now, my onDraw is not being called at all.
>
> > private class DemoView extends View{
> > public DemoView(Context context){
> > super(context);
> > }
>
> > �...@override protected void onDraw(Canvas canvas) {
> > super.onDraw(canvas);
> > canvas.drawColor(Color.WHITE);
> > }
>
> > public void methodA(){
> > // do something
>
> > // i want onDraw to be called here...
>
> > // do something
> > }
> > }
>
>
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