Android- Rotate image with single finger gesture

Question

I want to know about How to rotate the bitmap image with single touch gestures.kindly help and suggest some solutions. I done scaling the bitmap with the help of

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Answer 1

function that handles rotation with one finger, the main idea is to calculate the centerX and centerY of your view and taking into consideration the status bar height if you using one.

       @Override
       public boolean onTouch(View view, MotionEvent event) { 
         switch (action) {
                case MotionEvent.ACTION_UP:
                    break;
                case MotionEvent.ACTION_DOWN:

                    rotateX = event.getRawX();
                    rotateY = event.getRawY();

                    centerX = view.getX() + ((View) getParent()).getX() + (float) view.getWidth() / 2;

                    centerY = view.getY() + statusBarHeight + (float) view.getHeight() / 2;

                    break;

                case MotionEvent.ACTION_MOVE:

                    newRotateX = event.getRawX();
                    newRotateY = event.getRawY();

                    double angle = Math.atan2(event.getRawY() - centerY, event.getRawX() - centerX) * 180 / Math.PI;

                    view.setRotation((float) angle - 45);

                    rotateX = newRotateX;
                    rotateY = newRotateY;

            }
        }

        return true;
    }
};