Android RecyclerView With Animation

1) Add this line in gradle file

    implementation 'com.android.support:recyclerview-v7:28.0.0'

2) Create Animation Resource File In anim Folder

i) item_animation_fall_down.xml 

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="300">

    <translate
        android:fromYDelta="-20%"
        android:toYDelta="0"
        android:interpolator="@android:anim/decelerate_interpolator"/>

    <alpha
        android:fromAlpha="0"
        android:toAlpha="1"
        android:interpolator="@android:anim/decelerate_interpolator"/>

    <scale
        android:fromXScale="105%"
        android:fromYScale="105%"
        android:toXScale="100%"
        android:toYScale="100%"
        android:pivotX="50%"
        android:pivotY="50%"
        android:interpolator="@android:anim/decelerate_interpolator"/>

</set>

ii) layout_fall_down.xml

<?xml version="1.0" encoding="utf-8"?>
<layoutAnimation xmlns:android="http://schemas.android.com/apk/res/android"
    android:animation="@anim/item_animation_fall_down"
    android:delay="15%"
    android:animationOrder="normal">

</layoutAnimation>

iii) item_slide_from_right.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="300">

    <translate
        android:fromXDelta="100%p"
        android:toYDelta="0"
        android:interpolator="@android:anim/decelerate_interpolator"/>

    <alpha
        android:fromAlpha="0"
        android:toAlpha="1"
        android:interpolator="@android:anim/decelerate_interpolator"/>

<!--Todo: Lets Run this App In Android Device-->
</set>

iv) layout_slide_right.xml

<?xml version="1.0" encoding="utf-8"?>
<layoutAnimation xmlns:android="http://schemas.android.com/apk/res/android"
    android:animation="@anim/item_slide_from_right"
    android:delay="15%"
    android:animationOrder="normal">

</layoutAnimation>


3) item.xml custom list of recyclerview

<?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:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:padding="10dp"
        android:layout_marginTop="5dp"
        android:layout_marginLeft="5dp"
        android:layout_marginBottom="5dp"
        android:layout_marginRight="5dp"
        android:background="@drawable/card_rect"
        android:layout_gravity="center">
        ]
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/txt_home"
            android:textAlignment="center"
            android:text="Title"
            android:textColor="#000000"
            android:textSize="18dp"
            android:textStyle="bold"
            android:layout_marginBottom="5dp"/>


    </LinearLayout>


</LinearLayout>

4) Item_Card.java

public class Item_Card {

    String name;

    public Item_Card(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

}

5) ItemAdapter.java

class ItemAdapter extends RecyclerView.Adapter<ItemAdapter.ViewHolder>{

    List<Item_Card> list;

    Context context;

    public ItemAdapter(List<Item_Card> list, Context context) {

        this.list = list;

        this.context = context;

    }

    @NonNull

    @Override

    public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {

        View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.items, viewGroup, false);

        return new ItemAdapter.ViewHolder(view);

    }

    @Override

    public void onBindViewHolder(@NonNull ViewHolder viewHolder, int position) {

        Item_Card Cards = list.get(position);

        final String name = Cards.getName();

        viewHolder.home_title.setText(name);

    }

    @Override

    public int getItemCount() {

        return list.size();

    }

    public class ViewHolder extends RecyclerView.ViewHolder{

        TextView home_title;

        public ViewHolder(View itemView) {

            super(itemView);

            home_title = (TextView) itemView.findViewById(R.id.txt_home);

        }

    }

}

6) activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Button
            android:id="@+id/btn_fall_down"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Fall Down" />


        <Button
            android:id="@+id/btn_slide_right"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Slide Right" />

    </LinearLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:layout_editor_absoluteY="55dp"
        tools:ignore="MissingConstraints" />


</LinearLayout> 

7) MainActivity.java

public class MainActivity extends AppCompatActivity {

    private RecyclerView recyclerView;
    private ItemAdapter adapter;
    private List<Item_Card> Cardss;
    private RecyclerView.LayoutManager mLayoutManager;

    Button btn_fall_down, btn_slide_right;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btn_fall_down = (Button) findViewById(R.id.btn_fall_down);
        btn_slide_right = (Button) findViewById(R.id.btn_slide_right);

        recyclerView = (RecyclerView) findViewById(R.id.recyclerview);

        recyclerView.setHasFixedSize(true);

        mLayoutManager = new GridLayoutManager(MainActivity.this,2);
        recyclerView.setLayoutManager(mLayoutManager);
        Cardss = new ArrayList<>();

        btn_fall_down.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Data(recyclerView, 0);
            }
        });



        btn_slide_right.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Data(recyclerView, 2);
            }
        });
    }

    private void Data(RecyclerView recyclerView, int type) {


        Context context = recyclerView.getContext();
        LayoutAnimationController controller = null; // for animation

        if (type == 0){
            controller = AnimationUtils.loadLayoutAnimation(context, R.anim.layout_fall_down);
        } if(type == 2){
            controller = AnimationUtils.loadLayoutAnimation(context, R.anim.layout_slide_right);
        }

        for (int i = 0; i <=20; i++) {
            Cardss.add(new Item_Card(
                    String.valueOf(i)
            ));
        }
        //adapter.notifyDataSetChanged();
        adapter = new ItemAdapter(Cardss, MainActivity.this);
        recyclerView.setAdapter(adapter);

        recyclerView.setLayoutAnimation(controller);
        recyclerView.getAdapter().notifyDataSetChanged();
        recyclerView.scheduleLayoutAnimation();
    }
}