android: changing dialogfragment width & height

gistfile1.txt

DialogFragmentClass{
    @Override
    public void onStart() {
        super.onStart();
        int width = (int)(getResources().getDisplayMetrics().widthPixels*0.95);
        int height = (int)(getResources().getDisplayMetrics().heightPixels*0.30);
        getDialog().getWindow().setLayout(width, ViewGroup.LayoutParams.WRAP_CONTENT);
        //THIS WILL MAKE WIDTH 90% OF SCREEN 
        //HEIGHT WILL BE WRAP_CONTENT
        //getDialog().getWindow().setLayout(width, height);
    }
}