Assigning FrameLayout as half of parent RelativeLayout

Question

I have a frame layout inside a relative layout, that everything else is positioned below it. How can I make this frame layout take up one half of the whole screen?

I tried with weight but it doesn't change anything..

<RelativeLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
style="@style/mainLayoutStyle">

<FrameLayout 
       android:id="@+id/codeLayout"
       style="@style/codeLayoutLargeStyle">   

        <TextView 
            android:id="@+id/DisplayTextView"
            style="@style/DisplayTextViewLargeStyle"/>
</FrameLayout>
......
.....
   <LinearLayout 

Answer 1

I have a frame layout inside a relative layout, that everything else is positioned below it

Then you are using wrong layout as your parent. You should replace RelativeLayout with LinearLayout, set FrameLayout heights to match_parent and android:layout_weight="1" then wrap everyghing that you want below anything needed (Relative, Linear whatever) ensuring it got also set height and layout_weight as above. Then you will get 50%-50% height split

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <FrameLayout
        android:layout_weight="1"
        android:background="#ff0000"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

    <RelativeLayout
        android:layout_weight="1"
        android:background="#0000ff"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</LinearLayout>