how to add filter in recyclerview android code example

Example: filtering recyclerview android

<?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:orientation="vertical"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:layout_marginBottom="4dp"
   app:cardCornerRadius="4dp">
   <RelativeLayout
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:layout_margin="4dp">
   <ImageView
      android:id="@+id/image_view"
      android:layout_width="50dp"
      android:layout_height="50dp"
      android:padding="2dp" />
   <TextView
      android:id="@+id/textView1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentTop="true"
      android:layout_toEndOf="@+id/image_view"
      android:text="Line 1"
      android:textColor="@android:color/black"
      android:textSize="20sp"
      android:textStyle="bold" />
   <TextView
      android:id="@+id/textView2"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_below="@+id/text_view1"
      android:layout_marginStart="8dp"
      android:layout_toEndOf="@+id/image_view"
      android:text="Line 2"
      android:textSize="15sp" />
   </RelativeLayout>
</android.support.v7.widget.CardView>