android: set margin on PopupWindow by code

I want to set left and right margins on popupwindow. I try setting layout params on layout , and then set margin , but not work.

Can anyone give me code for setting margin on popupwindow

Here is code

LayoutInflater inflater = (LayoutInflater) QuestionsActiviy.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View layout = inflater.inflate(R.layout.popup, (ViewGroup) findViewById(R.id.popup_element));


        ratePw = new PopupWindow(layout);
        ratePw.setWidth(WindowManager.LayoutParams.FILL_PARENT);
        ratePw.setHeight(WindowManager.LayoutParams.WRAP_CONTENT);
        ratePw.setFocusable(true);

        ratePw.showAtLocation(layout, Gravity.CENTER, 0, 0);

Thanks.

as your layout is top on window, and you are doing this dynamically, by using width and height of screen, so to set margin 10 on sll side you can use:

Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int width = size.x;
int height = size.y;

LayoutInflater inflater = (LayoutInflater) QuestionsActiviy.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.popup, (ViewGroup) findViewById(R.id.popup_element));


ratePw = new PopupWindow(layout);
ratePw.setWidth(width-20);
ratePw.setHeight(height-20);
ratePw.setFocusable(true);