Why can't my recyclerview scroll completely

Question

I am trying to get recyclerview to scroll completely. For some reason the recyclerview stops to scroll at a particular spot, as if it as scrolled completedly.

Here's a picture of this:

Please keep in mind this is where the recyclerview scrolls to. And this fragment (screen) only contains the recyclerview.

this is the layout of the fragment containing the recyclerview:

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".ui.ways.WaysFragment"> <androidx.recyclerview.widget.RecyclerView android:id="@+id/recyclerview" android:layout_width="0dp" android:layout_height="0dp" app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" tools:listitem="@layout/custom_ways_item" /> </androidx.constraintlayout.widget.ConstraintLayout>

This the custom_view_item of the recyclerview:

<androidx.constraintlayout.widget.ConstraintLayout 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="425dp"> <androidx.cardview.widget.CardView android:id="@+id/cardView" android:layout_width="match_parent" android:layout_height="370dp" android:layout_rowWeight="1" android:layout_columnWeight="1" android:layout_marginStart="30dp" android:layout_marginTop="25dp" android:layout_marginEnd="30dp" android:foreground="?selectableItemBackground" app:cardCornerRadius="5dp" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent"> ..... </androidx.cardview.widget.CardView> </androidx.constraintlayout.widget.ConstraintLayout>

Thanks for your help in advance.. I'm more than happy to provide any information needed. Thanks again.

EDIT

Here's my activity_main.xml. I'm using navigation component method.

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/container" android:layout_width="match_parent" android:layout_height="match_parent"> <fragment android:id="@+id/nav_host_fragment_activity_main" android:name="androidx.navigation.fragment.NavHostFragment" android:layout_width="match_parent" android:layout_height="match_parent" app:defaultNavHost="true" app:layout_constraintBottom_toTopOf="@id/nav_view" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="@id/container" app:navGraph="@navigation/mobile_navigation" /> <com.google.android.material.bottomnavigation.BottomNavigationView android:id="@+id/nav_view" android:layout_width="0dp" android:layout_height="wrap_content" android:background="?android:attr/windowBackground" app:labelVisibilityMode="selected" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:menu="@menu/bottom_nav_menu" /> </androidx.constraintlayout.widget.ConstraintLayout>

How is the bottom navigation bar included in your layout? Is it also part of the ConstraintLayout holding your RecyclerView? — Ben P.
– Ben P., Commented Feb 13, 2022 at 19:25
@BenP. The naviagtion bar is on the main_activty's xml file I'm using navigation component method. And I have added the file above — Edwin
– Edwin, Commented Feb 13, 2022 at 19:33

Zain · Accepted Answer · 2022-02-13 20:02:32Z

The RecyclerView (fragment content) is drawn behind the BottomNavView; to solve this you need to make the fragment container to match the constraints by setting android:layout_height="0dp"; so that the constraints set can be applied:

 <fragment ... android:layout_height="0dp"

Kl3jvi · Accepted Answer · 2022-02-13 20:35:50Z

Give the recycler view a layout_height of 0dp so it can match constraints also link the bottom constraint to top of the bottom navigation menu.

<fragment android:id="@+id/nav_host_fragment_activity_main" android:name="androidx.navigation.fragment.NavHostFragment" android:layout_width="match_parent" android:layout_height="0dp" app:defaultNavHost="true" app:layout_constraintBottom_toTopOf="@id/nav_view" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" app:navGraph="@navigation/bottom_nav_menu" />

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