在AlertDialog中设置单选按钮和文本的样式

Question

因此，我创建了一个自定义主题，并将其作为AlertDialog.Builder构造函数的参数提供。

下面是显示对话框的代码：

private void showSortDialog() {
final CharSequence[] options = new String[] {"Relevance", "Newest"};
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivityReference(),
                                                          R.style.RadioDialogTheme);
    builder.setTitle("Sort by");
    builder.setSingleChoiceItems(options, -1, new DialogInterface.OnClickListener() {
    . . . . 
    builder.create().show();
}

风格如下：

<style name="RadioDialogTheme" parent="Theme.AppCompat.Light.Dialog.Alert">
    <item name="android:textColorAlertDialogListItem">@drawable/radiobutton_textcolor_selector
    </item>
    <item name="android:listChoiceIndicatorSingle">@drawable/apptheme_btn_radio_holo_light
    </item>
</style>

我能够找到我在样式中添加的几个属性，根据它们的状态更改单选按钮/文本的颜色。但是我无法自定义文本外观（我想更改大小、提供填充等）。

我确信有一些属性可以用来设置文本的样式，但我找不到它。有人能帮我吗？谢谢

Answer 1

我猜你差不多需要：

fun showSortDialog(context: Activity) {
    val options = arrayOf(
        "Relevance",
        "Price - Low to High",
        "Price - High to Low",
        "Newest"
    )
    val builder = AlertDialog.Builder(context, R.style.MultiChoiceAlertDialog)
    val view = context.layoutInflater.inflate(R.layout.dialog_custom, null, false)
    val radioGroup = view.findViewById<RadioGroup>(R.id.radiogroup)

    val purpleColor = ContextCompat.getColor(context, R.color.purple)
    val radioStyle = ContextThemeWrapper(radioGroup.context, R.style.MyRadioButton)
    for (option in options) {
        val radioButton = RadioButton(radioStyle)
        radioButton.setText(option)
        radioGroup.addView(radioButton)
    }
    radioGroup.setOnCheckedChangeListener { group, checkedId ->
        for (child in radioGroup.children) {
            child as RadioButton
            if (child.id == checkedId) {
                child.setTextColor(purpleColor)
            } else {
                child.setTextColor(Color.BLACK)
            }
        }
    }
    builder.setView(view)
    builder.show()
}

样式：

 <style name="YourAlertDialog.Button" parent="Widget.MaterialComponents.Button.TextButton">
    <item name="android:textColor">@color/colorPrimary</item>
    <item name="android:textSize">20sp</item>
    <item name="android:textAllCaps">false</item>
    <item name="android:gravity">left</item>
    <item name="android:letterSpacing">0</item>
</style>
<style name="MultiChoiceAlertDialog" parent="Theme.MaterialComponents.Light.Dialog.Alert">
    <item name="buttonBarPositiveButtonStyle">@style/YourAlertDialog.Button</item>
    <item name="buttonBarNegativeButtonStyle">@style/YourAlertDialog.Button</item>
    <item name="buttonBarNeutralButtonStyle">@style/YourAlertDialog.Button</item>
    <item name="android:background">#fff</item>
    <item name="android:textColorPrimary">#000</item>
    <item name="android:textColor">@drawable/selector_custom</item>
    <item name="android:colorActivatedHighlight">#0f0</item>
    <item name="android:colorControlActivated">#00f</item>
    <item name="colorControlNormal">@color/gray</item>
    <item name="colorControlActivated">@color/purple</item>
    <item name="dialogCornerRadius">8dp</item>
</style>

<style name="MyRadioButton" parent="Theme.AppCompat.Light">
    <item name="colorControlNormal">@color/gray</item>
    <item name="colorControlActivated">@color/purple</item>
</style>

以及自定义布局（dialog_custom.xml）：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical">
<androidx.appcompat.widget.AppCompatTextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margin="16dp"
    android:text="Sort by"
    android:textColor="#000"
    android:textSize="20sp" />
<RadioGroup
    android:id="@+id/radiogroup"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
</RadioGroup>