Android: strange weight inversion in LinearLayout -


this xml layout i'm working on:

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:background="#ffffff"     android:orientation="vertical" >      <scrollview          android:layout_weight="2"          android:id="@+id/scrollconfirm"          android:layout_width="fill_parent"         android:layout_height="fill_parent">    </scrollview>    <linearlayout        android:layout_margintop="20px"       android:layout_weight="1"        android:id="@+id/imagenumpad"        android:orientation="vertical"        android:layout_width="fill_parent"        android:layout_height="fill_parent">         <imageview android:src="@drawable/myicon"             android:layout_width="fill_parent"             android:layout_height="wrap_content"             android:layout_gravity="bottom"             android:background="#ffffff"         />    </linearlayout> </linearlayout>

since have setted scrollview layout_weight="2" , linearlayout (child) layout_weight="1" expected scrollview use twice free space linearlayout. obtain opposite result. scrollview smaller linearlayout. whereas if set scrollview layout_weight="1" , linearlayout layout_weight="2", scrollview greater linearlayou.

how possible??

weight inverse because using match_parent layout_height. weight used distribute remaining empty space or take away space when total sum larger linearlayout. set heights 0dip work.

i.e., set layout_height = "0dip" both scrollview , inner linearlayout.

reference :

the use of layout_weight android layouts


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