java - How to use FragmentTransaction's add() method to set a Fragment in a RelativeLayout -

i'am using drawerlayout slide right left , accomplish task i'have created below's method :

xml code :

<android.support.v4.widget.drawerlayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:facebook="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/drawer_layout" android:layout_width="match_parent" android:layout_height="match_parent" >  <!-- framelayout display fragments -->  <relativelayout     android:id="@+id/mainview"     android:layout_width="match_parent"     android:layout_height="match_parent" >   </relativelayout>  <!-- listview display slider menu -->  <relativelayout     android:id="@+id/drawerview"     android:layout_width="240dp"     android:layout_height="wrap_content"     android:layout_gravity="start" >      <listview         android:id="@+id/list_slidermenu"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:background="@color/list_background"         android:divider="@color/list_divider"         android:dividerheight="1dp" /> </relativelayout> 

java code :

public class profileactivity extends actionbaractivity { .... private drawerlayout mdrawerlayout; private actionbardrawertoggle mdrawertoggle;  relativelayout drawerview; relativelayout mainview; ....  @override protected void oncreate(bundle savedinstancestate) {       ............. //     .............//     drawerview = (relativelayout) findviewbyid(r.id.drawerview);     mainview = (relativelayout) findviewbyid(r.id.mainview);      mdrawertoggle = new actionbardrawertoggle(this, mdrawerlayout, r.drawable.ic_drawer, r.string.app_name, r.string.app_name) {         public void ondrawerclosed(view view) {             supportinvalidateoptionsmenu();         }          public void ondraweropened(view drawerview) {             supportinvalidateoptionsmenu();         }          @override         public void ondrawerslide(view drawerview, float slideoffset) {             super.ondrawerslide(drawerview, slideoffset);             mainview.settranslationx(slideoffset * drawerview.getwidth());             mdrawerlayout.bringchildtofront(drawerview);             mdrawerlayout.requestlayout();         }     };     mdrawerlayout.setdrawerlistener(mdrawertoggle);  }   } 

so want add fragment in relativelayout code .

any idea ?

    fragmentmanager fm = getfragmentmanager();     fragmenttransaction ft = fm.begintransaction();     view containerview = findviewbyid(r.id.mainview);     ft.add(r.id.mainview, fragment);     ft.commit();     fm.executependingtransactions(); 

you can call code in oncreate().