Android/app/src/main/res/layout/item_day.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    xmlns:tools="http://schemas.android.com/tools"
    android:background="#ffffff"
    android:layout_marginTop="0.5dp"
    android:layout_height="50dp">

    <LinearLayout
        android:id="@+id/ll_day"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="vertical">

        <TextView
            android:id="@+id/tv_day"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true"
            android:gravity="center"
            tools:text="1"
            android:textSize="15dp"/>

        <TextView
            android:id="@+id/tv_check_in_check_out"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="2dp"
            android:gravity="center"
            android:text="入住"
            android:textColor="@color/white"
            android:textSize="12dp"
            android:visibility="gone" />

    </LinearLayout>

</RelativeLayout>