CoordinatorLayout and weight

Question

I need to create a Coordinatorlayout with a Linear Layout and a RecyclerView with the same space for both.

I've tried setting layout_weight 0.5 but the RecyclerView is taking all the space.

This is my code.

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

     <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="0.5"
        android:background="@android:color/holo_green_light">

     </LinearLayout>

     <android.support.v7.widget.RecyclerView
        android:id="@+id/lvToDoList"            
        android:layout_weight="0.5"
        android:background="@android:color/holo_blue_bright"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
     </android.support.v7.widget.RecyclerView>

     <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end|right"
        android:layout_marginBottom="@dimen/activity_vertical_margin"
        android:layout_marginEnd="@dimen/activity_horizontal_margin"
        android:layout_marginRight="@dimen/activity_horizontal_margin"
        android:src="@android:drawable/ic_input_add" />

</android.support.design.widget.CoordinatorLayout>

How can I achive that?

Regards, Diego.

Answer 1

layout_weight working only in LinearLayout. So, put LinearLayout as middle layer:

<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="0.5"
            android:background="@android:color/holo_green_light">
        </LinearLayout>

        <android.support.v7.widget.RecyclerView
            android:id="@+id/lvToDoList"
            android:background="@android:color/holo_blue_bright"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="0.5"
            >
        </android.support.v7.widget.RecyclerView>

    </LinearLayout>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end|right"
        android:layout_marginBottom="@dimen/activity_vertical_margin"
        android:layout_marginEnd="@dimen/activity_horizontal_margin"
        android:layout_marginRight="@dimen/activity_horizontal_margin"
        android:src="@android:drawable/ic_input_add" />

</android.support.design.widget.CoordinatorLayout>