Android MapView not filling parent inside CardView

Question

Let me briefly explain what I'm trying to do. I am getting a restaurant from Yelp and putting the restaurant's attributes into a CardView. The reason I want a CardView is because I want swiping functionality. I want to be able to swipe left, right, and up. To do this, I need a RecyclerView to handle every direction (or so I've come to understand from reading this). If someone has a better way to do this please let me know.

For some reason, when you set MapView's layout_height to a concrete value, it resizes fine. But it won't fill the parent.

I don't want to set a concrete value for obvious compatibility issues.

Also, is it possible to disable swiping on the MapView part of the CardView?

So here are my layout files:

fragment_main.xml

<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:showIn="@layout/activity_main"
    tools:context=".MainActivityFragment">

    <RadioGroup
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_alignParentTop="true"
        android:id="@+id/radioGroup">

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Use Zip Code"
            android:id="@+id/useZip"
            android:checked="false" />

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Use Location"
            android:id="@+id/useLocation"
            android:checked="false" />
    </RadioGroup>

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="number"
        android:ems="10"
        android:id="@+id/zipcode"
        android:hint="zip code"
        android:layout_below="@+id/radioGroup"
        android:layout_centerHorizontal="true"
        android:visibility="gone" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Generate"
        android:id="@+id/generate"
        android:layout_gravity="bottom|center_horizontal"
        android:layout_below="@+id/zipcode"
        android:layout_centerHorizontal="true" />

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_centerHorizontal="true"
        android:layout_below="@+id/generate"
        android:layout_alignParentBottom="true">

        <android.support.v7.widget.RecyclerView
            android:orientation="vertical"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:id="@+id/container">

        </android.support.v7.widget.RecyclerView>

    </LinearLayout>

</RelativeLayout>

restaurant_item.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:id="@+id/restaurantContainer"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:map="http://schemas.android.com/tools">

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

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:orientation="horizontal">

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

                <ImageView
                    android:layout_width="@dimen/_75sdp"
                    android:layout_height="@dimen/_75sdp"
                    android:id="@+id/thumbnail"
                    android:layout_margin="@dimen/_5sdp"/>

                <ImageView
                    android:layout_width="@dimen/_75sdp"
                    android:layout_height="@dimen/_15sdp"
                    android:id="@+id/rating"
                    android:layout_margin="@dimen/_5sdp"/>
            </LinearLayout>

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

                <TextView
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:textAppearance="?android:attr/textAppearanceLarge"
                    android:id="@+id/name"
                    android:gravity="top"
                    android:layout_margin="@dimen/_5sdp"/>

                <TextView
                    android:layout_width="fill_parent"
                    android:layout_height="fill_parent"
                    android:textAppearance="?android:attr/textAppearanceMedium"
                    android:id="@+id/categories"
                    android:layout_margin="@dimen/_5sdp"/>
            </LinearLayout>

        </LinearLayout>

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="fill_parent">

            <com.google.android.gms.maps.MapView
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:id="@+id/mapView"
                map:mapType="normal"
                map:liteMode="true"
                map:cameraZoom="14"/>

        </LinearLayout>

    </LinearLayout>

</android.support.v7.widget.CardView>

Here's a screenshot of the problem:

Answer 1

Either set CardView height to let's say 200dp and MapView to fill_parent.

This way it will fill remaining height, you can adjust CardView height. or set CardView height to wrap_content and then provide your MapView height like 200dp (or whatever height you want).

Update: RecyclerView is a scroll view. Which means it has infinite height and every Card you put in it should have it's own height, card can't have fill_parent.

Now if you want your MapView to have rest of the height. I assume you mean rest of the Card height. For this first you have to define how long you want your Card to be.

Ex: If you set your Card height to 500dp, MapView to fill_parent and your content other than MapView inside Card is 100dp then MapView will take rest of the height (400dp).

If you want MapView to take rest of the height on the mobile screen then you have to remove RecyclerView and just use Card.