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我很简单MaterialAlertDialog，我想为 postive 按钮设置图标。所以我以编程方式设置图标，因为我想要多个警报对话框的唯一图标，并为所有人使用相同的主题dialog

这是我的做法。

final MaterialAlertDialogBuilder dialogBuilder = new MaterialAlertDialogBuilder(SubListActivity.this, R.style.AlertDialogTheme);
dialogBuilder.setTitle("Delete selected files ?");

ListView modeList = new ListView(SubListActivity.this);
modeList.setPadding(50,50,50,50);

CustomArrayAdapter adapter = new CustomArrayAdapter(SubListActivity.this, temp);
modeList.setAdapter(adapter);
dialogBuilder.setView(modeList);

dialogBuilder.setNegativeButton(android.R.string.no, null);
dialogBuilder.setPositiveButton(R.string.delete, (dialog, which) -> {

    //Some function
                    
}).setPositiveButtonIcon(getDrawable(R.drawable.ic_item_delete)).create().show();

主题

<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="rippleColor">@color/primarySubText</item>
    <item name="android:textColor">@color/primarySubText</item>
</style>

<style name="PositiveButtonStyle" parent="Widget.MaterialComponents.Button.TextButton.Icon">
    <item name="rippleColor">@color/secondaryLightColor</item>
    <item name="android:textColor">@color/darkRed</item>
    <item name="iconTint">@color/darkRed</item>
    <item name="iconSize">4dp</item>
    <item name="iconPadding">4dp</item>
</style>

结果：

在此处输入图像描述

如果我在主题中设置图标尺寸适合按钮。但正如我之前提到的，我想为永远的对话框设置唯一的图标。

那么如何调整图标大小呢？

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