这应该有效.转到您的 styles.xml 文件.

This should work. Go to your styles.xmls file.

<style name="TextAppearance.AppCompat.Widget.ActionBar.Title" parent="@style/TextAppearance.AppCompat">

    <item name="android:textSize">TEXT_SIZE_HERE</item>
    <item name="android:textColor">COLOR_RESOURCE_HERE</item>
    <item name="android:fontFamily">FONT_HERE</item>
</style>

相应地进行编辑.此处的视频教程 [https://www.***.com/watch?v=510WE8CmiXI][1]

Edit accordingly. Video tutorial here [https://www.***.com/watch?v=510WE8CmiXI][1]