Android Dialog fullScreen&Custom The Width&Height of The Dialog

Window dialogWindow = dialog.getWindow();
WindowManager.LayoutParams lp = dialogWindow.getAttributes();
lp.width=context.getResources().getDisplayMetrics().widthPixels;
lp.height=context.getResources().getDisplayMetrics().widthPixels;
dialogWindow.setGravity(Gravity.CENTER);
dialogWindow.setAttributes(lp);