如何更改Base.Theme.AppCompat.Dialog.Alert的框架？

Question

我有一个奇怪的问题，我的“警告对话框”开始看起来像这样： 我

我不知道为什么-在以前的版本中它们看起来很正常-没有这种奇怪的，宽阔的黑框。如何改变呢？ 我的风格代码：

    <style name="AlertDialogStyle" parent="Base.Theme.AppCompat.Dialog.Alert"> <!-- This theme has black settings icons -->
    <item name="colorPrimary">@color/app_mint</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/blackColor</item>
    <item name="android:windowBackground">@color/whiteColor</item>
    <item name="android:background">@color/app_main_color</item>
    <item name="android:fontFamily">@font/dosis_light</item>
    <!-- active thumb & track color (30% transparency) -->
    <item name="colorControlActivated">#46bdbf</item>
    <item name="android:titleTextStyle">@style/eventInfoTextLarge</item>
    <!-- inactive thumb color -->
    <item name="colorSwitchThumbNormal">#f1f1f1</item>
    <!-- inactive track color (30% transparency) -->
    <item name="android:colorForeground">#42221f1f</item>
    <item name="android:textColorPrimary">@color/blackColor</item>
</style>

活动代码：

    private void showDeleteConfirmationDialog() {
    // Create an AlertDialog.Builder and set the message, and click listeners
    // for the positive and negative buttons on the dialog.
    AlertDialog.Builder builder = new AlertDialog.Builder(this, R.style.AlertDialogStyle);
    builder.setMessage(livewind.example.andro.liveWind.R.string.delete_dialog_msg);
    builder.setPositiveButton(livewind.example.andro.liveWind.R.string.delete, new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int id) {
            // Windsurfer clicked the "Delete" button, so delete the event and remove 5 points.
            deleteEvent();
        }
    });
    builder.setNegativeButton(livewind.example.andro.liveWind.R.string.cancel, new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int id) {
            // Windsurfer clicked the "Cancel" button, so dismiss the dialog
            // and continue editing.
            if (dialog != null) {
                dialog.dismiss();
            }
        }
    });

    // Create and show the AlertDialog
    AlertDialog alertDialog = builder.create();
    alertDialog.show();
}

感谢您的帮助。