fragment_konwledge_center.xml

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

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#f5f5f5"
        android:orientation="vertical">

        <TextView
            android:id="@+id/tv_search"
            android:layout_width="match_parent"
            android:layout_height="40dp"
            android:layout_marginLeft="13dp"
            android:layout_marginRight="13dp"
            android:background="@color/cl_white"
            android:gravity="center"
            android:text="@string/konwledge_querry"
            android:textColor="@color/common_text_color" />


        <com.scwang.smartrefresh.layout.SmartRefreshLayout
            android:id="@+id/refresh_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginTop="2dp">

            <androidx.recyclerview.widget.RecyclerView
                android:id="@+id/rv_knowledge"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:overScrollMode="never" />

        </com.scwang.smartrefresh.layout.SmartRefreshLayout>

    </LinearLayout>
</layout>