将样式应用于警报对话框

问题描述

我决定尝试在Android上尝试对话框.我遇到的问题是尝试应用某些样式时.检查文档，我发现了这一点:

I decided to try material alert dialogs on android.The problem I am having is when I try to apply some styles. Checking the docs, I found this:

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

所以我决定尝试一下:

  <style name="BaseTheme" parent="Theme.MaterialComponents.DayNight.NoActionBar">

    <item name="materialAlertDialogTheme">@style/Theme.App.MaterialDialogAlert</item>

  </style>
      <style name="Theme.App.MaterialDialogAlert" parent="ThemeOverlay.MaterialComponents.Dialog.Alert">
        <!-- FIXME: this does not work. it does not change the title appearance. -->
    <!--    <item name="materialAlertDialogTitleTextStyle">@style/TextAppearance.App.MaterialDialogAlert.Title.Text</item>-->
        <!-- FIXME: this change only the title font, not the message appearance -->
        <item name="android:fontFamily">@font/nunito_semi_bold</item>
        <item name="buttonBarPositiveButtonStyle">@style/Widget.App.Button.TextButton</item>
        <item name="buttonBarNegativeButtonStyle">@style/Widget.App.Button.TextButton</item>
      </style>

    <style name="TextAppearance.App.MaterialDialogAlert.Title.Text" parent="MaterialAlertDialog.MaterialComponents.Title.Text">
        <item name="android:fontFamily">@font/nunito_semi_bold</item>
      </style>

但是到目前为止，我可以成功设置按钮的样式.关于标题和消息，我有一些问题.现在，我可以通过以下方式将某些样式应用于标题:

But so far I could style the buttons successfully. With the title and message I have some issues. Now I am able to apply some styles to the title with this:

<item name="android:fontFamily">@font/nunito_semi_bold</item>

但是我认为这不是正确的方法.首先，这不会将字体应用于消息部分.其次，我想应用其他文本样式，一种用于标题，一种用于消息部分.

But I do not think this is the proper way. First this does not apply the font to the message section. Second, I would like to apply other text styles, one for title and one for the message section.

我也尝试过检查以下样式:MaterialAlertDialog.MaterialComponents.Title.Text在某处可以应用该项目:

I tried also checking this style: MaterialAlertDialog.MaterialComponents.Title.Text where I can see that this item is being applied at some point:

<item name="android:textAppearance">?attr/textAppearanceSubtitle1</item>

所以我决定在基本主题中声明这一点:

So I decided to declare this in my base theme:

<style name="BaseTheme" parent="Theme.MaterialComponents.DayNight.NoActionBar">
    <item name="textAppearanceSubtitle1">@style/TextAppearance.App.Subtitle1</item>
  </style>

  <style name="TextAppearance.App.Subtitle1" parent="TextAppearance.MaterialComponents.Subtitle1">
    <item name="android:fontFamily">@font/nunito_semi_bold</item>
  </style>

但没有任何改变.

所以我的问题是:

1. 如何使用主题/样式正确执行此操作.
2. 我当前的代码在做什么错了?

编辑我也尝试过使用它:

EDITI tried using this too:

  <style name="Theme.App.MaterialDialogAlert" parent="ThemeOverlay.MaterialComponents.Dialog.Alert">
    <item name="materialAlertDialogTitleTextStyle">@style/Dialog.App.MaterialDialogAlert.Title.Text</item>
    <item name="materialAlertDialogBodyTextStyle">@style/TextAppearance.App.MaterialDialogAlert.Body.Text</item>
    <item name="buttonBarPositiveButtonStyle">@style/Widget.App.Button.TextButton</item>
    <item name="buttonBarNegativeButtonStyle">@style/Widget.App.Button.TextButton</item>
  </style>

  <style name="Dialog.App.MaterialDialogAlert.Title.Text" parent="MaterialAlertDialog.MaterialComponents.Title.Text">
    <item name="android:textAppearance">@style/TextAppearance.App.Subtitle1</item>
  </style>

  <style name="TextAppearance.App.Subtitle1" parent="TextAppearance.MaterialComponents.Subtitle1">
    <item name="fontFamily">@font/nunito_semi_bold</item>
    <item name="android:fontFamily">@font/nunito_semi_bold</item>
  </style>

但是它不起作用.

我也从材料组件回购中尝试过

Also I tried this from the material components repo:

  <style name="Theme.App.MaterialDialogAlert" parent="ThemeOverlay.MaterialComponents.Dialog.Alert">
    <item name="materialAlertDialogTitleTextStyle">@style/Dialog.App.MaterialDialogAlert.Title.Text</item>
    <item name="materialAlertDialogBodyTextStyle">@style/Dialog.App.MaterialDialogAlert.Body.Text</item>
    <item name="buttonBarButtonStyle">@style/Widget.App.Button.TextButton</item>
  </style>

  <style name="Dialog.App.MaterialDialogAlert.Title.Text" parent="MaterialAlertDialog.MaterialComponents.Title.Text">
    <item name="android:textAppearance">@style/TextAppearance.App.Subtitle1</item>
  </style>

  <style name="Dialog.App.MaterialDialogAlert.Body.Text" parent="@style/MaterialAlertDialog.MaterialComponents.Body.Text">
    <item name="android:textAppearance">@style/TextAppearance.Body2</item>
    <item name="fontFamily">@font/nunito_regular</item>
    <item name="android:fontFamily">@font/nunito_regular</item>
    <item name="android:textColor">@color/color_error</item>
  </style>

但不起作用.

我唯一可以自定义的想法就是将标题添加到主题中:

The only think I could customise was the title by adding this to the theme:

<item name="android:windowTitleStyle">@style/Dialog.App.MaterialDialogAlert.Title.Text</item>

---

我正在检查库中的代码，并且可以看到正在使用此布局: mtrl_alert_dialog.xml

在这里我可以看到:

<TextView
            android:id="@android:id/message"
            style="?attr/materialAlertDialogBodyTextStyle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingLeft="?attr/dialogPreferredPadding"
            android:paddingRight="?attr/dialogPreferredPadding"/>

在这里我们可以看到对materialAlertDialogBodyTextStyle的引用.也许这是库中的错误?

where we can see a reference to materialAlertDialogBodyTextStyle. So maybe it is a bug in the library?

推荐答案

您可以使用以下样式来自定义标题和正文:

You can use this style to customize the title and the body:

<style name="Theme.App.MaterialDialogAlert" parent="ThemeOverlay.MaterialComponents.Dialog.Alert">
    <!-- Title -->
    <item name="materialAlertDialogTitleTextStyle">@style/MyTitle_MaterialAlertDialog</item>
    <!-- Body -->
    <item name="materialAlertDialogBodyTextStyle">@style/BodyMaterialAlertDialog.MaterialComponents.Body.Text</item>
</style>

然后定义标题的样式:

<style name="MyTitle_MaterialAlertDialog" parent="@style/MaterialAlertDialog.MaterialComponents.Title.Text">
    <item name="android:textAppearance">@style/MyTitle_TextAppearance.MaterialComponents.Subtitle1</item>
</style>

<style name="MyTitle_TextAppearance.MaterialComponents.Subtitle1" parent="TextAppearance.MaterialComponents.Subtitle1">
    <item name="fontFamily">.....</item>
    <item name="android:fontFamily">....</item>
    <item name="android:textStyle">.....</item>
</style>

然后为主体定义:

  <style name="BodyTextAppearance.MaterialComponents.Body2" parent="@style/TextAppearance.MaterialComponents.Body2">
    <item name="android:textColor">@color/....</item>
    <item name="android:textSize">20sp</item>
    <item name="android:textStyle">bold</item>
    <item name="android:textAllCaps">true</item>
    <item name="fontFamily">.....</item>
    <item name="android:fontFamily">....</item>
  </style>

这篇关于将样式应用于警报对话框的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！