Get The Measures of Popup Window

You won't get the height or width of the view, which hasn't been drawn on the screen.

pupLayout.getWidth() // this will give you 0

You need to get the width like this

int width = MeasureSpec.makeMeasureSpec(0, MeasureSpec. UNSPECIFIED);

Use it like this

View pupLayout = inflater.inflate(R.layout.linearlayout_popup, base);
pupLayout.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 
            MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));

int x = location[0] - (int) ((pupLayout.getMeasuredWidth() - v.getWidth()) / 2 );