Android java horizontal recyclerview in vertical match_parent not work

Question

I followed the following tutorial: Here .

Which allows you to create such a thing:

I modified the layout a little bit.

  list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#831067d2"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#384148"
        android:orientation="horizontal"
        android:paddingLeft="10dp"
        android:paddingTop="10dp"
        android:paddingBottom="10dp">

        <ImageView
            android:id="@+id/iconApp"
            android:layout_width="30dp"
            android:layout_height="30dp" />

        <TextView
            android:id="@+id/titleApp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="5dp"
            android:text="Sample title"
            android:textColor="@android:color/white" />

    </LinearLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view_list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:orientation="horizontal" />

</LinearLayout>

list_single_card.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    app:cardCornerRadius="5dp"
    app:cardUseCompatPadding="true">

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

        <ImageView
            android:id="@+id/previewImageWidget"
            android:layout_width="150dp"
            android:layout_height="150dp"
            android:padding="5dp"
            android:layout_gravity="center_horizontal" />

        <TextView
            android:id="@+id/nameWidget"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/previewImageWidget"
            android:gravity="center"
            android:padding="5dp"
            android:text="Sample title"
            android:textColor="@android:color/black"
            android:textSize="18sp" />

    </LinearLayout>

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

The problem is the upper part where the "Section" is, does not take all the space it should take, its size is equal to the size of the content of the internal recyclerview the horizontal one.

Here:

I do not know if the problem is due to this:

  MainActivity.java

RecyclerView my_recycler_view = (RecyclerView) findViewById(R.id.my_recycler_view);
my_recycler_view.setHasFixedSize(true);
RecyclerViewDataAdapter adapter = new RecyclerViewDataAdapter(this, allSampleData);
my_recycler_view.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
my_recycler_view.setAdapter(adapter);

or

RecyclerViewDataAdapter.java

SectionListDataAdapter itemListDataAdapter = new SectionListDataAdapter(mContext, singleSectionItems);
itemRowHolder.recycler_view_list.setHasFixedSize(true);
itemRowHolder.recycler_view_list.setLayoutManager(new LinearLayoutManager(mContext, LinearLayoutManager.HORIZONTAL, false));
itemRowHolder.recycler_view_list.setAdapter(itemListDataAdapter);

Answer 1

Did you try to remove the second linear (in list_item.xml) layout's paddingLeft="10dp" and paddingTop="10dp" and then make change the layout_height="wrap_content" to layout_height="match_parent" for the first and second linear layout and make sure than #fillViewPort Is enabled for both of them

Answer 2

Modify your file list_item.xml to this:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#831067d2">

    <LinearLayout
        android:id="@+id/horizontalBarLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:background="#384148"
        android:orientation="horizontal"
        android:paddingLeft="10dp"
        android:paddingTop="10dp"
        android:paddingBottom="10dp"
        android:weightSum="10">

        <TextView
            android:id="@+id/titleApp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="5dp"
            android:text="Sample title"
            android:textColor="@android:color/white"
            android:layout_weight="9"/>

        <ImageView
            android:id="@+id/iconApp"
            android:layout_width="30dp"
            android:layout_height="30dp"
            android:layout_weight="1"/>

    </LinearLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view_list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:orientation="horizontal"
        android:layout_below="@+id/horizontalBarLayout"/>

</RelativeLayout>