JKBD/app/src/main/res/layout/layout_result.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@mipmap/dialog_bg"
    android:gravity="center">
    <TextView
        android:id="@+id/tv_result"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="你的分数是\n90分"
        android:gravity="center"
        android:layout_gravity="center"
        android:textSize="20sp"
        android:textColor="#000"/>

</LinearLayout>