Can't add RelativeLayout programmatically in android -

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i have xml layout file.this xml layout source code

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="wrap_content" android:layout_height="wrap_content" >  <relativelayout     android:id="@+id/rot"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:layout_alignparentleft="true"     android:layout_alignparenttop="true"     android:background="#ff0000" >      <imageview         android:id="@+id/btn_categorry"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_alignparentright="true"         android:layout_alignparenttop="true"         android:layout_marginright="12dp"         android:background="@drawable/ic_launcher" /> </relativelayout>

i try add new relativelayout programmatically,bellow 'rot' layout.i wrote code can't add new layout source

img.setonclicklistener(new onclicklistener() {          @override         public void onclick(view v) {             relativelayout.layoutparams parms = new relativelayout.layoutparams(                     relativelayout.layoutparams.fill_parent,                     relativelayout.layoutparams.wrap_content);             final relativelayout ll = new relativelayout(                     getapplicationcontext());              button add_btn = new button(getapplicationcontext());             add_btn.settext("click add textviiews , edittexts");             ll.addview(add_btn);              parms.addrule(relativelayout.below, r.id.rot);             ll.setlayoutparams(parms);         }     });

as said can't add layout.what doing wrong? if knows solution please me thanks

create object of main relative layout.

       relativelayout main = (relativelayout)findviewbyid(r.id.mainrelativelayout);        main.addview(ll);

add above code after ll.setlayoutparams(parms);


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