I want photo inside the imageview should not go outside on dragging. In my code when i start to drag bitmap inside the imageview its goes out from imageview but i want when it cross the imageview its should come at starting point of imageview.

How to achieve this. please help me for this.

@Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.save();
        scaleCount=scaleCount+scale;
        angleCount = addAngle(angleCount, Math.toDegrees(angle));       
        Log.v("Positions", "X: "+x+" " + "Y: "+y);
        Log.d("ScaleCount", String.valueOf(scaleCount));
        Log.d("Angle", String.valueOf(angleCount));     

        if (!isInitialized) {
            int w = getWidth();
            int h = getHeight();
            position.set(w / 2, h / 2);
            isInitialized = true;
        }
        Paint paint = new Paint();
        Log.v("Height and Width", "Height: "+ getHeight() + "Width: "+ getWidth());
        transform.reset();
        transform.postTranslate(-width / 2.0f, -height / 2.0f);
        transform.postRotate((float) Math.toDegrees(angle));
        transform.postScale(scale, scale);
        transform.postTranslate(position.getX(), position.getY());
        canvas.drawBitmap(bitmap, transform, paint);
        canvas.restore();
        BitmapWidth=BitmapWidth+bitmap.getScaledWidth(canvas);
        BitmapHeight=BitmapHeight+bitmap.getScaledHeight(canvas);

        try {
            /*paint.setColor(0xFF007F00);
            canvas.drawCircle(vca.getX(), vca.getY(), 30, paint);
            paint.setColor(0xFF7F0000);
            canvas.drawCircle(vcb.getX(), vcb.getY(), 30, paint);*/

            /*paint.setColor(0xFFFF0000);
            canvas.drawLine(vpa.getX(), vpa.getY(), vpb.getX(), vpb.getY(), paint);
            paint.setColor(0xFF00FF00);
            canvas.drawLine(vca.getX(), vca.getY(), vcb.getX(), vcb.getY(), paint);*/
        }
        catch(NullPointerException e) {
            // Just being lazy here...
        }
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        vca = null;
        vcb = null;
        vpa = null;
        vpb = null;
        x=event.getX();
        y=event.getY();
        try {
            touchManager.update(event);

            if (touchManager.getPressCount() == 1) {
                vca = touchManager.getPoint(0);
                vpa = touchManager.getPreviousPoint(0);
                position.add(touchManager.moveDelta(0));
            }
            else {
                if (touchManager.getPressCount() == 2) {
                    vca = touchManager.getPoint(0);
                    vpa = touchManager.getPreviousPoint(0);
                    vcb = touchManager.getPoint(1);
                    vpb = touchManager.getPreviousPoint(1);

                    VMVector2D current = touchManager.getVector(0, 1);
                    VMVector2D previous = touchManager.getPreviousVector(0, 1);
                    float currentDistance = current.getLength();
                    float previousDistance = previous.getLength();

                    if (currentDistance-previousDistance != 0) {
                        scale *= currentDistance / previousDistance;
                    }
                    angle -= VMVector2D.getSignedAngleBetween(current, previous);
                    /*angleCount=angleCount+angle;*/
                }
            }
            invalidate();
        }
        catch(Exception exception) {
        //  Log.d("VM", exception.getMessage());
        }
        return true;
    }