LayoutParams

LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) text.getLayoutParams();
lp.setMargins(1, 1, 10, 1);


//居中設置 （RelativeLayout）
RelativeLayout.LayoutParams lp2 = new RelativeLayout.LayoutParams(24, 24);
lp2.addRule(RelativeLayout.CENTER_IN_PARENT);


setGravity(Gravity.CENTER);