[Android] Layout의 중앙에 TextView표시

RelativeLayout fl = new RelatedLayout(this);

fl.setBackgroundColor(Color.BLUE);

TextView tv = new TextView(this);

tv.setText("Set Text");

tv.setBackgroundColor(Color.WHITE);

tv.setHeight(100);

tv.setWidth(100);

tv.setGravity(Gravity.CENTER);

LayoutParams lp2 = 

new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

lp2.addRule(RelativeLayout.CENTER_IN_PARENT);

fl.addView(tv, lp2);