activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView 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"
    tools:context="com.so.moreview.ui.activity.MainActivity">

    <LinearLayout
        android:id="@+id/ll_content"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="@dimen/eight_dp">

        <LinearLayout
            android:id="@+id/ll_item"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@android:color/darker_gray"
            android:orientation="vertical"
            android:padding="@dimen/eight_dp"
            tools:ignore="UselessParent">

            <EditText
                android:id="@+id/et_item"
                android:layout_width="match_parent"
                android:layout_height="@dimen/forty_dp"
                android:background="@android:color/white"
                android:gravity="center_vertical"
                android:inputType="textMultiLine"
                android:textSize="@dimen/sixteen_sp"
                tools:ignore="LabelFor" />

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/eight_dp">

                <ImageButton
                    android:id="@+id/ib_add"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentEnd="true"
                    android:background="@drawable/add"
                    android:contentDescription=""
                    tools:ignore="ContentDescription" />
            </RelativeLayout>
        </LinearLayout>
    </LinearLayout>
</ScrollView>