ThreeGames/app/src/main/res/layout/toast.xml

<?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">
    <LinearLayout
        android:layout_width="match_parent"
        android:orientation="horizontal"
        android:background="@android:color/darker_gray"
        android:gravity="center"
        android:padding="20dp"
        android:layout_height="match_parent">

        <TextView
            android:layout_width="wrap_content"
            android:id="@+id/tvToast"
            android:text="Toast"
            android:textSize="35sp"
            android:textColor="#fff"
            android:layout_height="wrap_content"/>
    </LinearLayout>
</LinearLayout>