xml - Android - ScrollView doesnt work on Relative Layout -

i put scrollview around relative layout adding dynamically. if set height of relative layout fixed amount goes off of page scrollview work.

example:

 <scrollview      android:id="@+id/scrollview1"     android:layout_width="match_parent"     android:layout_height="match_parent"      android:fillviewport="true" >      <relativelayout         android:id="@+id/llcustomrow"         android:layout_width="match_parent"         android:layout_height="800dp" >     </relativelayout> </scrollview> 

but need relativelayout able hold many items add dynamically o set relativelayout height wrap_content. once add enough items relative layout going off screen scrollview doesnt register

below how dynamically adding relative layout

linearlayout mlinearlayout; relativelayout rlcopy; relativelayout[] rarray = new relativelayout[20]; int counter = 0; relativelayout llcustomrow; relativelayout.layoutparams paramsleft;    @override public view oncreateview(layoutinflater inflater, viewgroup container,         bundle savedinstancestate) {     mlinearlayout = (linearlayout) inflater.inflate(             r.layout.customworkout, container, false);       paramsleft = new relativelayout.layoutparams(relativelayout.layoutparams.wrap_content,                                                  relativelayout.layoutparams.wrap_content);       llcustomrow = (relativelayout)mlinearlayout.findviewbyid(r.id.llcustomrow);      for(int = 0;i<=rarray.length-1;i++){         rarray[i] = (relativelayout)view.inflate(getactivity(), r.layout.addworkoutlayout, null);              paramsleft.addrule(relativelayout.align_parent_left);              paramsleft.setmargins(10, 0, 0, 0);              rarray[i].setlayoutparams(paramsleft);      }     button badd = (button) mlinearlayout.findviewbyid(r.id.baddexcercise);        badd.setonclicklistener(new onclicklistener() {                  @override         public void onclick(view v) {                  rarray[counter].sety(rarray[counter-1].gety() + (rarray[counter-1].getheight() +25));               llcustomrow.addview(rarray[counter]);                counter++;          }     });       return mlinearlayout; } 

thanks

why using relativelayout? i'd advise switching linearlayout.