canvas.save(Canvas.MATRIX_SAVE_FLAG);
canvas.rotate(angle, *X + *getWidth() >> 1, *Y +* getHeight() >> 1);
super.dispatchDraw(canvas);
canvas.restore();
On Monday, September 10, 2012 2:22:15 PM UTC-5, lbendlin wrote:
>
> canvas.save(Canvas.MATRIX_SAVE_FLAG);
> canvas.rotate(angle, getWidth() >> 1, getHeight() >> 1);
> super.dispatchDraw(canvas);
> canvas.restore();
>
> On Monday, September 10, 2012 9:18:32 AM UTC-4, 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......
>>
>
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