oasystem/oamodule/src/main/res/layout/activity_document_add.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".activity.document.DocumentAddActivity">

    <androidx.core.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="40dp"
        android:scrollbars="none">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <LinearLayout style="@style/item_hor_content">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_vertical"
                    android:text="文档类型"
                    android:textColor="@color/black"
                    android:textSize="14sp" />

                <TextView
                    android:id="@+id/tv_doc_type"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_vertical"
                    android:clickable="true"
                    android:drawableRight="@drawable/ic_arrow_right"
                    android:focusable="true"
                    android:gravity="right"
                    android:hint="请选择文档类型"
                    android:textColor="@color/black"
                    android:textSize="14sp" />
            </LinearLayout>

            <LinearLayout style="@style/item_hor_content">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_vertical"
                    android:text="文件类型"
                    android:textColor="@color/black"
                    android:textSize="14sp" />

                <TextView
                    android:id="@+id/tv_file_type"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_vertical"
                    android:clickable="true"
                    android:drawableRight="@drawable/ic_arrow_right"
                    android:focusable="true"
                    android:gravity="right"
                    android:hint="请选择文件类型"
                    android:textColor="@color/black"
                    android:textSize="14sp" />
            </LinearLayout>

            <LinearLayout style="@style/item_ver">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_vertical"
                    android:text="文档文件"
                    android:textColor="@color/black"
                    android:textSize="14sp" />

                <RelativeLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="5dp"
                    android:background="@drawable/shp_rectangle_gray"
                    android:orientation="vertical">

                    <androidx.recyclerview.widget.RecyclerView
                        android:id="@+id/rlv_files"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        tools:itemCount="3" />

                </RelativeLayout>
            </LinearLayout>

            <LinearLayout style="@style/item_ver">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_vertical"
                    android:text="文件说明"
                    android:textColor="@color/black"
                    android:textSize="14sp" />

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="5dp"
                    android:background="@drawable/shp_rectangle_gray"
                    android:orientation="vertical">

                    <EditText
                        android:id="@+id/et_summary"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center_vertical"
                        android:background="@null"
                        android:gravity="left"
                        android:hint="请输入文件说明"
                        android:minLines="3"
                        android:padding="5dp"
                        android:textColor="@color/black"
                        android:textSize="14sp" />
                </LinearLayout>
            </LinearLayout>

            <LinearLayout style="@style/item_ver">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_vertical"
                    android:text="备注"
                    android:textColor="@color/black"
                    android:textSize="14sp" />

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="5dp"
                    android:background="@drawable/shp_rectangle_gray"
                    android:orientation="vertical">

                    <EditText
                        android:id="@+id/et_remark"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center_vertical"
                        android:background="@null"
                        android:gravity="left"
                        android:hint="请输入备注"
                        android:minLines="3"
                        android:padding="5dp"
                        android:textColor="@color/black"
                        android:textSize="14sp" />
                </LinearLayout>
            </LinearLayout>
        </LinearLayout>
    </androidx.core.widget.NestedScrollView>


    <Button
        android:id="@+id/btn_confirm"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_margin="10dp"
        android:background="@drawable/sel_btn_submit"
        android:text="上传"
        android:textColor="@color/col_white_gray_press" />

</RelativeLayout>