Android Listview

Question

How can I get a Listview to assemble the items as follows:

When you have only one item it occupies the entire screen, if you have two divide 50% of the screen size between the items and so on...

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  
   xmlns:tools="http://schemas.android.com/tools"
   android:id="@+id/RelativeLayout1"  
   android:layout_width="match_parent"  
   android:layout_height="match_parent"  
   android:orientation="vertical"
   tools:context=".ListViewActivity" >  

<ListView
    android:id="@+id/listaromaneiosview"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:divider="@color/Black"
    android:dividerHeight="5dp"
    tools:listitem="@layout/cre_004_listaromaneios_adpter" >

</ListView>

<TextView 
    android:id="@+id/textoListView"
    android:text=""
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_weight="3"
    android:textSize="@dimen/titulo"/>

<ImageButton
    android:id="@+id/selecionaRomaneio"
    android:layout_width="30dp"
    android:layout_height="match_parent"
    android:layout_gravity="left"
    android:layout_weight="1"
    android:background="@color/White"
    android:contentDescription="@string/app_name"
    android:maxWidth="100dp"
    android:onClick="actionListner"
    android:src="@android:drawable/ic_menu_delete" />

Answer 1

ListView, from the point of view of children, has infinite height, does not make sense a match_parent. What you need is a LinearLayout (don’t forget the orientation="vertical") and adds the children with layout_height="0dp" and layout_weight="1" (value does not matter, as long as it is the same for all items). For performance reasons, put also the weightSum in the LinearLayout as the sum of the weights (Weight) of the children. It is possible to do this at runtime also with setWeightSum().