<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:background="@color/transparent"
    android:layout_height="match_parent">

    <androidx.cardview.widget.CardView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:cardElevation="20dp"
        app:cardCornerRadius="10dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.3">

        <LinearLayout
            android:layout_width="wrap_content"
            android:gravity="center_horizontal"
            android:layout_height="wrap_content"
            android:padding="30dp"
            android:orientation="vertical">

            <com.google.android.material.progressindicator.LinearProgressIndicator
                android:id="@+id/progress_indicator"
                android:layout_width="500dp"
                android:layout_height="30dp"
                android:layout_marginHorizontal="50dp"
                app:indicatorColor="?attr/colorPrimary" />

            <TextView
                android:id="@+id/tv_loading"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="20dp"
                android:text="提示信息" />

        </LinearLayout>

    </androidx.cardview.widget.CardView>

</androidx.constraintlayout.widget.ConstraintLayout>