[Solved] Clear SurfaceView

[Alexander Schmidt]

Hey guys,
I'm new in this Forum and I hope you can help me with a little SurfaceView problem.

An external Thread is calling doDraw:

 Canvas c=null;
    try{
         c=mHolder.lockCanvas(null);
         synchronized(mHolder)
               mySurfaceView.doDraw(c);     
    }finally{
         if(c!=null)
              mHolder.unlockCanvasAndPost(c);     
    }

The doDraw() in MySurfaceView

    public void doDraw(Canvas canvas({
         canvas.drawBitmap(mBackground, 0, 0, null);
         canvas.DrawPath(line, paint);
    }

What I see now, is the image in the background and a line. But if the configuration of the line changes, i don't see the line "moving". There now is a line for every call of doDraw().

I found this in the DevGuide:

On each pass you retrieve the Canvas from the SurfaceHolder, the previous state of the Canvas will be retained. In order to properly animate your graphics, you must re-paint the entire surface. For example, you can clear the previous state of the Canvas by filling in a color with drawColor() or setting a background image with drawBitmap(). Otherwise, you will see traces of the drawings you previously performed.

But I have a background Image and it doesnt help.
So I tried

canvas.drawColor(Color.BLACK);

I even tried to draw a rectangle:

canvas.drawRect(new Rect(0,0,canvas.getWidth(), canvas.getHeigth()), paintBlack);

But it's not working.
And now I need your help ;)

[Alexander Schmidt]

Solved it.
I dont know why i use Path().
I have to use drawLine() instead.