Search code examples
javaandroidxmlanimationandroid-6.0-marshmallow

Android Recycler View notifyItemRemoved animation cut off

I'm currently working on a Grade Manager for school written in Java for Android 6. I just started with Android so I'm no expert.

The Problem:
If I call the method notifyItemRemoved() on my RecycleView Adapter and the last CardView moves from the left bottom place to the upper right place, the View is resized and the animation is cut of.

Now I don't know why that view is resized because RecycleView's layout_height attribute is match_parent.

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView 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"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context=".SemesterActivity"
    tools:showIn="@layout/activity_semester">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/subject_list_view"
        android:padding="20dp"
        android:layout_below="@+id/title"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"/>

</android.support.v4.widget.NestedScrollView>

I took a GridLayoutManager as LayoutManager for the RecycleView.

subjectListView.setLayoutManager(new GridLayoutManager(ActivityContext, 2));

How i update the RecycleView:

SubjectAdapterObj.notifyItemRemoved(viewHolder.getAdapterPosition());

The animation is the default animation.

Could the GridLayoutManager be the problem?

Video Example:

Animation cut off

Solution

  • So I finally found out what the problem was.
    It actually was the NestedScrollView which resizes it's children.
    So what you need to do is to simply add android:fillViewport="true" to your NestedScrollView.

    Thats it. I hope it helps someone although it's not a really difficult bug. I just searched at the wrong places.