rotate an image aroound a point
- by Girish
Hi all,
I have an image which is of rectangular dimension, eg 30 x 60 pixels
I want to rotate this image around the bottom center of the image, i.e
i want to set the pivot in the above example as (15, 60 )pixel.
I am using a drawble and matrix to get this done,
whatever i try i always end up rotating around center of the image.
Code is :
Bitmap bitmapOrg = BitmapFactory.decodeFile("/sdcard/DCIM/2010-06-01_15-32-42_821.jpg");
// float angle = (angle + 10.0f)%360.0f;
if(null !=bitmapOrg)
{
int width = bitmapOrg.getWidth();
int height = bitmapOrg.getHeight();
int newWidth = 15;
int newHeight = 15;
// calculate the scale - in this case = 0.4f
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
/* Canvas c = new Canvas(bitmapOrg);
float px = ;
float py;
c.rotate(angle, px, py)*/
// createa matrix for the manipulation
Matrix matrix = new Matrix();
// resize the bit map
matrix.postScale(scaleWidth, scaleHeight);
// rotate the Bitmap
// matrix.postRotate(45);
// recreate the new Bitmap
Bitmap resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0,
width, height, matrix, true);
// make a Drawable from Bitmap to allow to set the BitMap
// to the ImageView, ImageButton or what ever
BitmapDrawable bmd = new BitmapDrawable(resizedBitmap);
ImageView imageView = new ImageView(this);
// set the Drawable on the ImageView
imageView.setImageDrawable(bmd);
// center the Image
imageView.setScaleType(ScaleType.CENTER);
// imageView.layout(100, 300, 0, 0);
// linLayout.addView(imageView);
// add ImageView to the Layout
linLayout.addView(imageView,
new AbsoluteLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 10, 30
)
);
can anyone let me know how to get this rectified?
