Roatate image about it's centre
<p>I am trying an application like rotating image with motion sensor....My problem is that the image does not rotate about centre properly....And my angle range is 0 to 90 and 0 to -90..
And below is my code.....</p>

<pre><code>  public void onDraw(Canvas canvas) {
    super.onDraw(canvas);
 Bitmap arrow = BitmapFactory.decodeResource(getResources(),R.drawable.arrow);
 int arrowW = arrow.getWidth();
 int arrowH = arrow.getHeight();
 float scaleWidth = 1;
 float scaleHeight = 1;
 int centrex = arrowW/2;
 int centrey = arrowH/2;
 int X=108;
 int Y=100;
 int angle=0;

   Matrix matrix = new Matrix();
   matrix.postScale(scaleWidth, scaleHeight);

   matrix.postRotate(angle, X+centrex , Y+centrey );
   Bitmap resizedBitmap = Bitmap.createBitmap(arrow, 0, 0, arrow.getWidth(), arrow.getHeight(), matrix, true);
  canvas.save();
  canvas.drawBitmap(resizedBitmap, X, Y, null);
  invalidate();
 }
</code></pre>

<p>I am getting the angle values from onCreate method.....Using orientation sensor(roll values)..
But When I rotate the screen my  image is  rotating but not exactly around the image centre.....</p>

<p>Thanks......</p>
