LAYOUT - CAP NHAT MARGIN LAYOUT

RelativeLayout relativeLayoutTrangSanPhamDanhMucGridView = (RelativeLayout)v.findViewById(R.id.relativeLayoutTrangSanPhamDanhMucGridView);
RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams)relativeLayoutTrangSanPhamDanhMucGridView.getLayoutParams();
params.setMargins(0, 0, 40, 0); //substitute parameters for left, top, right, bottomrelativeLayoutTrangSanPhamDanhMucGridView.setLayoutParams(params);