old_way

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
 
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:weightSum="20">
 
        <View
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            />
 
        <View
            android:layout_width="0dp"
            android:layout_height="100dp"
            android:layout_weight="5"
            android:background="#ff0000" />
 
    </LinearLayout>
 
</RelativeLayout>