Android guide page image configuration problem

In order to display it well on mobile phones, the aspect ratios of mobile phones with different screen sizes are different, so our basic idea is to enlarge the picture based on the width. The mobile phone can be easily configured through the centerCrop attribute in the scaleType in the ImageView

Layout code:

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

    <ImageView
        android:scaleType="centerCrop"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/launcher_bg"
        />
</LinearLayout>