对于标题和消息，您可以用途：

<style name="MaterialAlertDialog__Center" parent="@style/ThemeOverlay.MaterialComponents.MaterialAlertDialog">
        <item name="materialAlertDialogTitlePanelStyle">@style/Title.Panel.Center</item>
        <item name="materialAlertDialogBodyTextStyle">@style/Message.Center</item>
    </style>

    <style name="Title.Panel.Center" parent="MaterialAlertDialog.MaterialComponents.Title.Panel">
        <item name="android:gravity">center_horizontal</item>
    </style>

    <style name="Message.Center" parent="MaterialAlertDialog.MaterialComponents.Body.Text">
        <item name="android:gravity">center_horizontal</item>
    </style>

与：

MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialog_Center)
                .setTitle("Message")
                ..
                .show()

您可以创建自己的布局并将其添加到对话框中

val inflater=LayoutInflater.from(requireContext())
//Getting the custom view
val view=inflater.inflate(R.layout.YOUR_CUSTOM_LAYOUT,null)
//Obtaining the components
val title=view.findViewById(R.id.YOUR_CUSTOM_TILE)
title.text="Message"
val button=view.findViewById(R.id.YOUR_CUSTOM_BUTTON)
button.setOnCLickListener{
    //onClick
    }
val dialog=MaterialAlertDialogBuilder(requireContext()).setView(view).create()
dialog.show()

要使标题和消息居中，您只需在主题中更改此设置

<item name="materialAlertDialogTheme">@style/ThemeOverlay.MaterialComponents.MaterialAlertDialog.Centered</item>

以最简单的方式

MaterialAlertDialogBuilder(context, com.google.android.material.R.style.ThemeOverlay_Material3_MaterialAlertDialog_Centered)