how to align center a bitmap inside a canvas in android?

i have a bitmap on canvas.i need to align bitmap to centre of canvas(centre of the image should be in centre of canvas.in my requirement,there should not give fixed points to align bitmap).while portrait view how to scale canvas and image appropriate to resolution?

    public void onDraw(Canvas canvas) {
    Bitmap imgtable = BitmapFactory.decodeResource(getResources(), R.drawable.table_01);
    canvas.drawColor(Color.TRANSPARENT);
    canvas.drawBitmap(imgtable, 10, 10, null);

    }