Dynamically resize fragment in android -

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i have fragment fill of screen. now, if add new fragment each fragment fill half of screen. how can this?enter image description here

i tried layout , programmatically added fragments. doesn't work.

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"     android:layout_height="match_parent" android:paddingleft="@dimen/activity_horizontal_margin"     android:paddingright="@dimen/activity_horizontal_margin"     android:paddingtop="@dimen/activity_vertical_margin"     android:paddingbottom="@dimen/activity_vertical_margin"     tools:context="tech.test.org.game.game$placeholderfragment">       <relativelayout         android:id="@+id/relativelayout"         android:layout_width="match_parent"         android:layout_height="0px"         android:layout_weight="50">       </relativelayout>      <relativelayout         android:id="@+id/relativelayout2"         android:layout_width="match_parent"         android:layout_height="0px"         android:layout_below="@+id/relativelayout"         android:layout_weight="50"         >         </relativelayout>  </relativelayout>

thanks.

the answer given kat-hat correct takes load, load ui may hamper performance. 

    <relativelayout         android:id="@+id/relativelayout"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:layout_weight="0.5"    >      </relativelayout>      <relativelayout         android:id="@+id/relativelayout2"         android:layout_width="match_parent"         android:layout_height="match_parent"         android:layout_weight="0.5"         android:visibility="gone" >          </relativelayout>  </linearlayout>

when adding second fragment programatically set layout2 visibility visible.

findviewbyid(r.id.relativelayout2).setvisibility(view.visible);

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