android - DrawerLayout populating menus from other activity -

i'am creating menu 2 navigation drawers 1 in each side:

left/right navigation drawers

everything working should want separate populating tasks main activity left activity , right activity, on had separeted layouts (just better struture)

this main layout:

<!-- main content view -->  <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"     tools:context=".mainactivity" >      <listview         android:id="@+id/main_list_viewer"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:background="@android:color/white"         android:divider="@android:color/darker_gray"         android:dividerheight="1dp"         android:footerdividersenabled="true"         android:paddingleft="1dp" >     </listview>      <textview         android:id="@+id/textview1"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_alignparentleft="true"         android:layout_alignparenttop="true"         android:text="@string/hello_world" /> </relativelayout>  <!-- left navigation drawer -->  <include layout="@layout/activity_left" />  <!-- right navigation drawer -->  <include layout="@layout/activity_right" /> 

and left drawer layout:

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/left_drawer" android:layout_width="240dp" android:layout_height="match_parent" android:layout_gravity="left" android:background="#111" android:orientation="vertical" >  <linearlayout     android:id="@+id/buttons_linear_layout"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:orientation="horizontal" >      <imagebutton         android:id="@+id/login_image_button"         android:layout_width="50dip"         android:layout_height="50dip"         android:contentdescription="@string/login_image"         android:src="@drawable/ic_launcher" />      <imagebutton         android:id="@+id/logout_image_button"         android:layout_width="50dip"         android:layout_height="50dip"         android:contentdescription="@string/login_image"         android:src="@drawable/ic_launcher" /> </linearlayout>  <listview     android:id="@+id/left_list_viewer"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:background="@android:color/white"     android:choicemode="singlechoice"     android:divider="@android:color/black"     android:dividerheight="0dp" > </listview> 

now populated left navigation drawer listviewer dummies.

public class leftactivity extends sherlockactivity implements onclicklistener{ private listview leftlistview; private arrayadapter<string> listadapter; // session manager class sessionmanager session;  @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_left);     movetasktoback(true);     leftlistview = (listview) findviewbyid(r.id.left_list_viewer);      // create , populate list of planet names.     string[] planets = new string[] { "mercury", "venus", "earth", "mars",             "jupiter", "saturn", "uranus", "neptune" };     arraylist<string> planetlist = new arraylist<string>();     planetlist.addall(arrays.aslist(planets));      // create arrayadapter using planet list.     listadapter = new arrayadapter<string>(this, r.layout.simplerow,             planetlist);      // add more planets. if passed string[] instead of list<string>     // arrayadapter constructor, must not add more items.     // otherwise exception occur.     listadapter.add("ceres");     listadapter.add("pluto");     listadapter.add("haumea");     listadapter.add("makemake");     listadapter.add("eris");      // set arrayadapter listview's adapter.     leftlistview.setadapter(listadapter);      // onclicklistener's button, after pressed send     // onclick method button pressed     imagebutton loginimagebutton = (imagebutton) findviewbyid(r.id.login_image_button);     loginimagebutton.setonclicklistener(this);     imagebutton logouimagebutton = (imagebutton) findviewbyid(r.id.logout_image_button);     logouimagebutton.setonclicklistener(this);  }  // method decide what button pressed public void onclick(view v) {     session = new sessionmanager(getapplicationcontext());     switch (v.getid()) {     case r.id.login_image_button:         if (session.isloggedin() == false) {             intent intent = new intent(getapplicationcontext(),                     loginactivity.class);             intent.setflags(intent.flag_activity_clear_top);             startactivity(intent);         } else {             log.d("moodydebud",                     "entrará aqui se o utilizador ja estiver logado e em vez de vir para aqui irá para defeniçoes de utilizador");         }         break;     case r.id.logout_image_button:         if (session.isloggedin() == true) {             session.logoutuser();         } else {             // só entra neste else caso o utilizador ainda nao esteja             // loggado entao é reencaminhado para o loginactivity             intent intent = new intent(getapplicationcontext(),                     loginactivity.class);             intent.setflags(intent.flag_activity_clear_top);             startactivity(intent);         }         break;     default:         throw new runtimeexception("unknown button id");     } } 

}

but problem when start mainactivity leftactivitity it's not initialized , listview empty, think intent it's not option because on main menu. ideas how solve this? in advance ;)