title: android expandablelistview how to set space between groups items
body: <p>I have expandablelistview and I want to add padding (or margin) between the groups items, I used <code>margin-botton</code> on the group items, it works but now it is also applied to the group item and its childs, I want to keep a space between groups items, not between a group item and its child, i work like this:</p>
  
  <h3> main xml</h3>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="vertical" 
      android:background="#FFFFFF"&gt;
  
      &lt;TextView android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:typeface="serif"
          android:textSize="25dip"
          android:textColor="#025f7c"
          android:text="@string/tv_allAddresses"
          android:layout_gravity="center"
          android:layout_marginTop="20dip"
          android:layout_marginBottom="25dip"/&gt;
  
      &lt;ExpandableListView
          android:id="@+id/elv_all_addresses_addresses"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
           android:padding="10dip"&gt;
      &lt;/ExpandableListView&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <h3>group xml </h3>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="vertical" &gt;
  
      &lt;TextView
          android:id="@+id/tv_all_address_group_groupName"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:paddingLeft="30dip"
          android:textColor="#000000"
          android:textSize="20dip"
          android:typeface="serif" /&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <h3> child xml </h3>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="horizontal" &gt;
  
      &lt;TextView
          android:id="@+id/tv_all_address_child_label"
          android:paddingLeft="50dip"
          android:typeface="serif"
          android:textSize="15dip"
          android:textColor="@color/BlueViolet"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content" /&gt;
  
      &lt;TextView
          android:id="@+id/tv_all_address_child_value"
          android:textColor="#000000"
          android:layout_marginLeft="10dip"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content" /&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>