在学习的同时又看了很多造型。要知道的一件重要的事情是，代码比样式更高级。按键的样式并不适用，所以我感谢Ramakrishna Joshi在这篇文章中的回答。我在其中添加了白天和夜晚的主题:

private fun AlertDialog.dlgTextColor() {
    val currentNightMode = (resources.configuration.uiMode
            and Configuration.UI_MODE_NIGHT_MASK)
    when (currentNightMode) {
        Configuration.UI_MODE_NIGHT_YES -> {
            this.getButton(AlertDialog.BUTTON_POSITIVE).setTextColor(ContextCompat.getColor(context, R.color.yellow_accent))
            this.getButton(AlertDialog.BUTTON_NEGATIVE).setTextColor(ContextCompat.getColor(context, R.color.yellow_accent))
        }
        Configuration.UI_MODE_NIGHT_NO -> {
            this.getButton(AlertDialog.BUTTON_POSITIVE).setTextColor(ContextCompat.getColor(context, R.color.blue_accent))
            this.getButton(AlertDialog.BUTTON_NEGATIVE).setTextColor(ContextCompat.getColor(context, R.color.blue_accent))
        }
    }
}

对它的调用是:

.dlgTextColor()

在对话构建器中，对该方法的调用确实跟在.show之后。

下面是一种使用样式的自然方法:

如果你的AppTheme继承自Theme。MaterialComponents,那么:

<style name="AlertDialogTheme" parent="ThemeOverlay.MaterialComponents.Dialog.Alert">
    <item name="buttonBarNegativeButtonStyle">@style/NegativeButtonStyle</item>
    <item name="buttonBarPositiveButtonStyle">@style/PositiveButtonStyle</item>
</style>

<style name="NegativeButtonStyle" parent="Widget.MaterialComponents.Button.TextButton.Dialog">
    <item name="android:textColor">#f00</item>
</style>

<style name="PositiveButtonStyle" parent="Widget.MaterialComponents.Button.TextButton.Dialog">
    <item name="android:textColor">#00f</item>
</style>

如果你的AppTheme继承自Theme。AppCompat:

<style name="AlertDialogTheme" parent="ThemeOverlay.AppCompat.Dialog.Alert">
    <item name="buttonBarNegativeButtonStyle">@style/NegativeButtonStyle</item>
    <item name="buttonBarPositiveButtonStyle">@style/PositiveButtonStyle</item>
</style>

<style name="NegativeButtonStyle" parent="Widget.AppCompat.Button.ButtonBar.AlertDialog">
    <item name="android:textColor">#f00</item>
</style>

<style name="PositiveButtonStyle" parent="Widget.AppCompat.Button.ButtonBar.AlertDialog">
    <item name="android:textColor">#00f</item>
</style>

使用你的AlertDialogTheme在你的AppTheme

<item name="alertDialogTheme">@style/AlertDialogTheme</item>

或者在构造函数中

androidx.appcompat.app.AlertDialog.Builder(context, R.style.AlertDialogTheme)

或者如果你正在使用MaterialAlertDialogBuilder，那么使用

<item name="materialAlertDialogTheme">@style/AlertDialogTheme</item>

使用styles.xml (value)

非常简单的解决方案，改变colorPrimary作为您的选择，它将改变按钮文本的警告框的颜色。

<style name="MyAlertDialogStyle" parent="android:Theme.Material.Dialog.Alert">


        <!-- Used for the buttons -->
        <item name="colorAccent">@android:color/white</item>
        <!-- Used for the title and text -->
        <item name="android:textColorPrimary">@color/black</item>

        <!-- Used for the background -->
        <item name="android:background">#ffffff</item>
        <item name="android:colorPrimary">@color/white</item>
        <item name="android:colorAccent">@color/white</item>
        <item name="android:windowEnterAnimation">@anim/bottom_left_enter</item>
    </style>

替代方案(使用Java)

 @SuppressLint("ResourceAsColor")
            public boolean onJsAlert(WebView view, String url, String message, final JsResult result) {

                AlertDialog dialog = new AlertDialog.Builder(view.getContext(), R.style.MyAlertDialogStyle)

                        .setTitle("Royal Frolics")
                        .setIcon(R.mipmap.ic_launcher)
                        .setMessage(message)
                        .setPositiveButton("OK", (dialog1, which) -> {
                            //do nothing
                            result.confirm();
                        }).create();

                Objects.requireNonNull(dialog.getWindow()).getAttributes().windowAnimations = R.style.MyAlertDialogStyle;
                dialog.show();
                
                dialog.getButton(AlertDialog.BUTTON_POSITIVE).setTextColor(R.color.white);
                return true;

            }

按钮和其他文本的颜色也可以通过主题来改变:

values-21 / styles.xml

<style name="AppTheme" parent="...">
  ...
  <item name="android:timePickerDialogTheme">@style/AlertDialogCustom</item>
  <item name="android:datePickerDialogTheme">@style/AlertDialogCustom</item>
  <item name="android:alertDialogTheme">@style/AlertDialogCustom</item>
</style>

<style name="AlertDialogCustom" parent="android:Theme.Material.Light.Dialog.Alert">
  <item name="android:colorPrimary">#00397F</item>
  <item name="android:colorAccent">#0AAEEF</item>
</style>

结果:

以下是@trungdinhtrong接受的答案的Kotlin版本:

val alert = builder.create()
if (button1Text == "Delete") {
    alert.setOnShowListener { dialog ->
        alert.getButton(AlertDialog.BUTTON_POSITIVE).setTextColor(Color.RED);
    }
}

BTW, it seems like Android's idea of "positive" and "negative" buttons isn't compatible with the idea of "safe" and "destructive" buttons. In a dialog with Cancel and Delete buttons, I think Android would consider Delete the positive button because it performs an action, but I would consider it a destructive button because it leads to data loss. So instead of using the styles file to set positive and negative button colors, I'm using this code to make the Delete button red even though it's the "positive" button.

这是一个自定义主题，以改变AlertDialog按钮的textColor。 它在我的设备上工作-三星ga70 -安卓11

<style name="AlertDialogCustom" parent="Theme.AppCompat.Light.Dialog.Alert">
    <!--Support for other devices, I think so-->
        <item name="android:textColor">@color/yourcolor</item>
        <item name="colorButtonNormal">@color/yourcolor</item>
        <item name="colorAccent">@color/yourcolor</item>
    <!--only this code works on my device-->
        <item name="buttonBarButtonStyle">@style/MyButtonStyle</item>
    </style>

    <!--only this code works on my device-->
    <style name="MyButtonStyle" parent="Widget.AppCompat.Button.Borderless">
        <item name="android:textColor">@color/yourcolor</item>
    </style>