I thought you were using an image of an arrow? I would put a breakpoint here: screenW = w;
Make sure screenW and screenH are getting set correctly. On Saturday, September 15, 2012 12:42:36 AM UTC-5, Haris wrote: > > > > > Hai bob thanks for your reply....... > > I made the change as you said... * > > Y = (int) (screenH /2) - (arrowH / 2) ;* > > But still the same results. > > And here is some screen shot of my results at central position left and > right.... > > > Centre<https://lh3.googleusercontent.com/-gmk0bpPFRaA/UFQTgNViVXI/AAAAAAAAAJk/L8aKeWbyfyY/s1600/centre.jpg> > > Left<https://lh5.googleusercontent.com/--1s1WMp6JWs/UFQUKYdzHDI/AAAAAAAAAJs/2p77As5VGY0/s1600/left.jpg> > > Right<https://lh6.googleusercontent.com/-Gopc01ZOM94/UFQUoJ0d76I/AAAAAAAAAJ0/OxShY4rktZ4/s1600/right.jpg> > > Thanks...... > > > > On Monday, 10 September 2012 18:48:32 UTC+5:30, Haris wrote: >> >> Hai all >> >> 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..... >> >> 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(); >> } >> >> 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..... >> >> Thanks...... >> > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
