android - Display a lisView on mapView -

i want display listview on mapview in below image of google maps app.

initially map visible. when user clicks on tab want listview appear on mapview.

but problem using below layout not display maps(gray screen visible). however, listview displayed.

layout :

<?xml version="1.0" encoding="utf-8"?> <relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     android:id="@+id/pickmatcheslayout"     android:layout_width="match_parent"     android:layout_height="match_parent" >      <tabhost         android:id="@+id/tabhost"         android:layout_width="match_parent"         android:layout_height="match_parent" >          <linearlayout             android:layout_width="match_parent"             android:layout_height="match_parent"             android:orientation="vertical" >              <tabwidget                 android:id="@android:id/tabs"                 android:layout_width="match_parent"                 android:layout_height="wrap_content" >             </tabwidget>              <framelayout                 android:id="@android:id/tabcontent"                 android:layout_width="match_parent"                 android:layout_height="match_parent" >                  <relativelayout                     android:id="@+id/map_layout"                     android:layout_width="match_parent"                     android:layout_height="match_parent" >                      <fragment                         android:id="@+id/map"                         android:name="com.google.android.gms.maps.mapfragment"                         android:layout_width="match_parent"                         android:layout_height="match_parent" />                      <include layout="@layout/listview" >                     </include>                 </relativelayout>             </framelayout>         </linearlayout>     </tabhost>  </relativelayout> 

method set tabs :

// set tabs private void setuptabs() {      // tabhost     tabhost = (tabhost) findviewbyid(r.id.tabhost);     tabhost.setup();      // create tabs     tabspec sourceonlystate = tabhost.newtabspec(source_only_state);     sourceonlystate.setcontent(r.id.map);     sourceonlystate.setindicator("source only");      tabspec allstate = tabhost.newtabspec(all_state);     allstate.setcontent(r.id.map);     allstate.setindicator("all");      tabspec maptypes = tabhost.newtabspec(map_features);     maptypes.setcontent(r.id.map_layout);     maptypes.setindicator("map types");      // add tabs in tabhost     tabhost.addtab(sourceonlystate);     tabhost.addtab(allstate);     tabhost.addtab(maptypes);      // set tab change listener     tabhost.setontabchangedlistener(this); } 

onclick of tab start new activity , code related listview in activity , set theme activity

android:theme="@android:style/theme.holo.dialog.noactionbar"