更改android字体无效

    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Hello World"
    android:fontFamily="@font/your_font_file" />

<?xml version="1.0" encoding="utf-8"?>
<font-family xmlns:android="http://schemas.android.com/apk/res/android">
    <font
        android:font="@font/your_font_file"
        android:fontStyle="normal"
        android:fontWeight="400" />
    <font
        android:font="@font/your_font_bold_file"
        android:fontStyle="normal"
        android:fontWeight="700" />
</font-family>

    <!-- Customize your theme here. -->
    <item name="android:fontFamily">@font/font_family</item>
    <item name="fontFamily">@font/font_family</item>
</style>